public static void Run()
{
ConsoleScanner cs = new ConsoleScanner();
int n = cs.NextInt();
int[] a = new int[n];
for (int i = 0; i < n; i++)
{
a[i] = cs.NextInt();
}
a = a.OrderBy(x => x).ToArray();
long len = 0;
int prev = int.MaxValue;
for (int i = n - 1; i >= 0; i--)
{
if (a[i] < prev)
{
len += a[i];
prev = a[i];
if (prev == 1) break;
}
else
{
len += prev - 1;
prev--;
if (prev == 1) break;
}
}
Console.WriteLine(len);
}
// N ^ 2
public static void RunDP()
{
ConsoleScanner sc = new ConsoleScanner();
int n = sc.NextInt();
int[] a = new int[n];
int[] dp = new int[n];
dp[0] = 1;
for (int i = 0; i < n; i++)
{
a[i] = sc.NextInt();
if (i > 0)
{
int ind = -1, len = 0;
for (int j = i - 1; j >= 0; j--)
{
if (a[j] < a[i] && dp[j] > len)
{
len = dp[j];
ind = j;
}
}
dp[i] = (ind == -1) ? 1 : dp[ind] + 1;
}
}
Console.WriteLine(dp.Max());
}
public static void Run()
{
ConsoleScanner sc = new ConsoleScanner();
int n = sc.NextInt(), m = sc.NextInt(), k = sc.NextInt(), blockSize = (int)Math.Ceiling(Math.Sqrt(n));
int[] a = new int[n], pref = new int[n], count = new int[(int)2e6];
Query[] queries = new Query[m];
long[] offlineAnswers = new long[m];
for (int i = 0; i < n; i++)
{
a[i] = sc.NextInt();
if (i == 0) pref[i] = a[i];
else pref[i] = a[i] ^ pref[i - 1];
}
for (int i = 0; i < m; i++)
{
queries[i] = new Query { Id = i, Left = sc.NextInt() - 1, Right = sc.NextInt() - 1 };
queries[i].Block = queries[i].Left / blockSize;
}
queries = queries.OrderBy(q => q.Block).ThenBy(q => q.Right).ToArray();
int wL = 0, wR = 1;
count[pref[0]]++;
long ans = count[pref[1] ^ k];
count[pref[1]]++;
// Mo's Algorithm
foreach (Query query in queries)
{
while (wR < query.Right)
{
wR++;
ans += count[pref[wR] ^ k];
count[pref[wR]]++;
}
while (wR > query.Right)
{
count[pref[wR]]--;
ans -= count[pref[wR] ^ k];
wR--;
}
while (wL < query.Left)
{
count[pref[wL]]--;
ans -= count[pref[wL] ^ k];
wL++;
}
while (wL > query.Left)
{
wL--;
ans += count[pref[wL] ^ k];
count[pref[wL]]++;
}
offlineAnswers[query.Id] = ans + count[(wL > 0 ? pref[wL - 1] : 0) ^ k];
}
foreach (long res in offlineAnswers)
{
Console.WriteLine(res);
}
}
public static void Run()
{
ConsoleScanner cs = new ConsoleScanner();
int T = cs.NextInt();
while (T-- > 0)
{
int N = cs.NextInt();
long[] sum = new long[N], a = new long[N];
int[] index = new int[N];
for (int i = 0; i < N; i++)
{
a[i] = cs.NextInt();
index[i] = i;
if (i > 0) sum[i] = sum[i - 1] + a[i];
else sum[0] = a[0];
}
Array.Sort(a, index);
long res = 0;
int left = 0;
for (int i = N - 1; i >= 0; i--)
{
int maxIndex = index[i];
if (maxIndex >= left)
{
res += a[i] * (maxIndex - left) - (maxIndex > 0 ? sum[maxIndex - 1] : 0) + (left > 0 ? sum[left - 1] : 0);
left = maxIndex + 1;
}
}
Console.WriteLine(res);
}
}
public static void Run()
{
ConsoleScanner sc = new ConsoleScanner();
int n = sc.NextInt();
Solve(n);
Console.WriteLine(_sb);
}
public static void Run()
{
ConsoleScanner sc = new ConsoleScanner();
int T = sc.NextInt();
while (T-- > 0)
{
int N = sc.NextInt();
int[] a = new int[N];
for (int i = 0; i < N; i++)
{
a[i] = sc.NextInt();
}
int min = a.Min();
int[] solutions = new int[5];
for (int i = 0; i < N; i++)
{
int diff = a[i] - min;
solutions[0] += diff / 5 + (diff % 5) / 2 + (diff % 5) % 2;
solutions[1] += (diff + 1) / 5 + ((diff + 1) % 5) / 2 + ((diff + 1) % 5) % 2;
solutions[2] += (diff + 2) / 5 + ((diff + 2) % 5) / 2 + ((diff + 2) % 5) % 2;
solutions[3] += (diff + 3) / 5 + ((diff + 3) % 5) / 2 + ((diff + 3) % 5) % 2;
solutions[4] += (diff + 4) / 5 + ((diff + 4) % 5) / 2 + ((diff + 4) % 5) % 2;
}
Console.WriteLine(solutions.Min());
}
}
public static void Run()
{
ConsoleScanner sc = new ConsoleScanner();
long n = sc.NextLong(), a = sc.NextLong(), b = sc.NextLong(), c = sc.NextLong(), liters = 0;
if (b - c < a && n >= b)
{
long i = (n - b) / (b - c) + 1;
liters += i;
n -= i * (b - c);
}
liters += n / a;
Console.WriteLine(liters);
}
public static void Run()
{
ConsoleScanner sc = new ConsoleScanner();
int n = sc.NextInt();
string str = sc.ReadLine();
int[] altSeq = new int[n], revAltSeq = new int[n];
char current = str[0];
int index = 0;
altSeq[0] = index;
for (int i = 1; i < n; i++)
{
if (str[i] == current) altSeq[i] = index;
else
{
current = str[i];
index++;
altSeq[i] = index;
}
}
current = str[n - 1];
index = 0;
revAltSeq[n - 1] = index;
for (int i = n - 2; i >= 0; i--)
{
if (str[i] == current) revAltSeq[i] = index;
else
{
current = str[i];
index++;
revAltSeq[i] = index;
}
}
int[] dp = new int[n];
dp[0] = 1;
for (int i = 1; i < n; i++)
{
int merged = str[i] == str[i - 1] ? dp[i - 1] : dp[i - 1] + 1;
int newOne = str[i] == str[i - 1] ? altSeq[i - 1] + 2 : altSeq[i - 1] + 1;
dp[i] = Math.Max(merged, newOne);
}
int answer = altSeq[n - 1] + 1;
for (int i = 0; i < n - 1; i++)
{
answer = Math.Max(answer, dp[i] + (str[i] == str[i + 1] ? revAltSeq[i + 1] + 1 : revAltSeq[i + 1]));
}
answer = Math.Max(answer, dp[n - 1]);
Console.WriteLine(answer);
}
public static void Run()
{
ConsoleScanner sc = new ConsoleScanner();
int n = sc.NextInt();
long[] a = new long[1999], b = new long[1999];
while (n-- > 0)
{
int i = sc.NextInt(), j = sc.NextInt();
a[(j - i) + 999]++;
b[(1001 - j) - i + 999]++;
}
long sum = 0;
for (int i = 0; i < 1999; i++)
{
sum += (a[i] * (a[i] - 1)) / 2;
sum += (b[i] * (b[i] - 1)) / 2;
}
Console.WriteLine(sum);
}
public static void Run()
{
ConsoleScanner sc = new ConsoleScanner();
int n = sc.NextInt();
int min = int.MaxValue, oddCount = 0;
long sum = 0;
while (n-- > 0)
{
int t = sc.NextInt();
if (t % 2 == 1)
{
oddCount++;
min = Math.Min(min, t);
}
sum += t;
}
if (oddCount % 2 == 1) sum -= min;
Console.WriteLine(sum);
}
public static void Run()
{
ConsoleScanner sc = new ConsoleScanner();
int n = sc.NextInt(), p = sc.NextInt();
long[] l = new long[n], r = new long[n];
for (int i = 0; i < n; i++)
{
l[i] = sc.NextInt();
r[i] = sc.NextInt();
}
double expected = 0;
for (int i = 0; i < n; i++)
{
int j = (i + 1) % n;
long pi = r[i] / p - (l[i] - 1) / p, pj = r[j] / p - (l[j] - 1) / p;
double e = 1 - ((r[i] - l[i] + 1 - pi) * (r[j] - l[j] + 1 - pj) * 1.0) / ((r[i] - l[i] + 1) * (r[j] - l[j] + 1) * 1.0);
expected += e * 2e3;
}
Console.WriteLine(expected.ToString().Replace(",", "."));
}
public static void Run()
{
ConsoleScanner sc = new ConsoleScanner();
int n = sc.NextInt(), k = sc.NextInt();
int left = 1, right = n * (k - 1) + 1, ksum = 0;
StringBuilder sb = new StringBuilder();
for (int i = 0; i < n; i++)
{
for (int j = 0; j < n; j++)
{
if (j < k - 1) sb.Append(left++ + " ");
else
{
if (j == k - 1) ksum += right;
sb.Append(right++ + " ");
}
}
sb.Append("\n");
}
Console.WriteLine(ksum);
Console.Write(sb);
}
public static void Run()
{
ConsoleScanner sc = new ConsoleScanner();
int n = sc.NextInt();
int[,] a = new int[n, n];
int[] p = new int[n];
for (int i = 0; i < n; i++)
{
for (int j = 0; j < n; j++)
{
a[i, j] = sc.NextInt();
}
}
int[] rem = new int[2];
int c = 0;
for (int i = 0; i < n; i++)
{
int[] count = new int[n + 1];
bool found = false;
for (int j = 0; j < n; j++)
{
if (i == j) continue;
count[a[i, j]]++;
if (count[a[i, j]] == 2)
{
p[i] = a[i, j];
found = true;
break;
}
}
if (!found) rem[c++] = i;
}
p[rem[0]] = n - 1;
p[rem[1]] = n;
foreach (int i in p)
{
Console.Write(i + " ");
}
}
// NlogN
public static void RunNlogN()
{
ConsoleScanner sc = new ConsoleScanner();
int n = sc.NextInt();
int[] a = new int[n], tails = new int[n];
for (int i = 0; i < n; i++)
{
a[i] = sc.NextInt();
}
tails[0] = a[0];
int spot = 1;
for (int i = 1; i < n; i++)
{
if (tails[0] >= a[i]) tails[0] = a[i];
else if (tails[spot - 1] <= a[i])
{
if (tails[spot - 1] < a[i]) tails[spot++] = a[i];
}
else tails[searchSpot(tails, 0, spot - 1, a[i])] = a[i];
}
Console.WriteLine(spot);
}
// Not solved yet! Should throw OutOfMemoryException
public static void Run()
{
ConsoleScanner sc = new ConsoleScanner();
int n = sc.NextInt(), m = sc.NextInt();
int[] a = new int[n];
int[] pref = new int[(int)3e6];
for (int i = 0; i < n; i++)
{
a[i] = sc.NextInt();
}
for (int i = 1; i < pref.Length; i++)
{
pref[i] = i ^ pref[i - 1];
}
int[,] dp = new int[n, n];
for (int r = 0; r < n; r++)
{
for (int l = r; l >= 0; l--)
{
if (l == r) dp[l, r] = a[l];
else
{
int xor1 = 0;
if (a[l] <= a[r]) xor1 = pref[a[r]] ^ (a[l] > 0 ? pref[a[l] - 1] : 0);
int xor2 = 0;
if (a[r] < a[l]) xor2 = pref[a[l]] ^ (a[r] > 0 ? pref[a[r] - 1] : 0);
dp[l, r] = Math.Max(dp[l, r - 1], Math.Max(dp[l + 1, r], Math.Max(xor1, xor2)));
}
}
}
StringBuilder sb = new StringBuilder();
while (m-- > 0)
{
int l = sc.NextInt() - 1, r = sc.NextInt() - 1;
sb.Append(dp[l, r] + "\n");
}
Console.WriteLine(sb);
}
public static void Run()
{
ConsoleScanner cs = new ConsoleScanner();
int n = cs.NextInt();
int[] ratings = new int[n];
int[] candies = new int[n];
for (int i = 0; i < n; i++)
{
ratings[i] = cs.NextInt();
}
for (int i = 0; i < n; i++)
{
if (i > 0 && i < n - 1)
{
if (ratings[i] <= ratings[i - 1] && ratings[i] <= ratings[i + 1]) candies[i] = 1;
}
else if (n > 1)
{
if (i == 0 && ratings[i] <= ratings[i + 1] || i == n - 1 && ratings[i] <= ratings[i - 1]) candies[i] = 1;
}
else candies[i] = 1;
}
for (int i = 1; i < n; i++)
{
if (ratings[i] > ratings[i - 1]) candies[i] = candies[i - 1] + 1;
}
for (int i = n - 2; i >= 0; i--)
{
if (ratings[i] > ratings[i + 1]) candies[i] = Math.Max(candies[i], candies[i + 1] + 1);
}
long sum = 0;
for (int i = 0; i < n; i++)
{
sum += candies[i];
}
Console.WriteLine(sum);
}
public static void Run()
{
ConsoleScanner sc = new ConsoleScanner();
int n = sc.NextInt();
List<Point> points = new List<Point>();
Point f = new Point { x = sc.NextInt(), y = sc.NextInt(), i = 1 };
for (int i = 1; i < n; i++)
{
Point p = new Point { x = sc.NextInt(), y = sc.NextInt(), i = i + 1 };
p.dist = p.DistanceSqr(f);
points.Add(p);
}
points = points.OrderBy(p => p.dist).ToList();
Point s = points.First();
points.RemoveAt(0);
foreach (Point t in points)
{
if (!Collinear(f.x, f.y, s.x, s.y, t.x, t.y))
{
Console.WriteLine(f.i + " " + s.i + " " + t.i);
return;
}
}
}
public static void Run()
{
ConsoleScanner sc = new ConsoleScanner();
fact[0] = 1;
for (int i = 1; i < fact.Length; i++)
{
fact[i] = (i * fact[i - 1]) % Mod;
}
int A = sc.NextInt(), B = sc.NextInt(), D = sc.NextInt(), C = sc.NextInt();
long ans = 0;
if (A == 0 && B == 0 && C == 0 && D == 0) ans = 2;
else if (((A != 0 && D == 0) || (A == 0 && D != 0)) && B == 0 && C == 0) ans = 1;
if (B == C && B != 0)
{
ans = ((GetCombination(A + B, B) * GetCombination(D + B - 1, B - 1)) % Mod + (GetCombination(D + B, B) * GetCombination(A + B - 1, B - 1)) % Mod) % Mod;
}
else if (Math.Abs(B - C) == 1)
{
int M = Math.Max(B, C);
ans = (GetCombination(M + A - 1, M - 1) * GetCombination(M + D - 1, M - 1)) % Mod;
}
Console.WriteLine(ans);
}
public static void Run()
{
ConsoleScanner cs = new ConsoleScanner();
int n = cs.NextInt(), m = cs.NextInt(), acount = 0, bcount = 0, ccount = 0;
int[,] graph = new int[n, n];
char[] letter = Enumerable.Repeat(' ', n).ToArray();
LinkedList<int> nodes = new LinkedList<int>();
for (int i = 0; i < n; i++) nodes.AddLast(i);
for (int i = 0; i < m; i++)
{
int u = cs.NextInt() - 1, v = cs.NextInt() - 1;
graph[u, v] = 1;
graph[v, u] = 1;
}
for (int i = 0; i < n; i++)
{
int adj = 0;
for (int j = 0; j < n; j++)
{
if (graph[i, j] == 1) adj++;
}
if (adj == n - 1)
{
nodes.Remove(i);
letter[i] = 'b';
bcount++;
}
}
if (nodes.Count != 0)
{
int a = nodes.First();
nodes.RemoveFirst();
letter[a] = 'a';
acount++;
for (int i = 0; i < n; i++)
{
if (graph[a, i] == 1 && letter[i] == ' ')
{
letter[i] = 'a';
nodes.Remove(i);
acount++;
}
}
if (nodes.Count != 0)
{
int c = nodes.First();
nodes.RemoveFirst();
letter[c] = 'c';
ccount++;
for (int i = 0; i < n; i++)
{
if (graph[c, i] == 1)
{
if (letter[i] == ' ')
{
letter[i] = 'c';
nodes.Remove(i);
ccount++;
}
else if (letter[i] == ' ')
{
Console.WriteLine("No");
return;
}
}
}
if (nodes.Count > 0)
{
Console.WriteLine("No");
return;
}
for (int i = 0; i < n; i++)
{
if (letter[i] == 'b') continue;
int adj = 0;
for (int j = 0; j < n; j++)
{
if (graph[i, j] == 1)
{
if (letter[j] != 'b')
{
if (letter[i] != letter[j])
{
Console.WriteLine("No");
return;
}
else adj++;
}
}
}
if ((letter[i] == 'a' && adj < acount - 1) || (letter[i] == 'c' && adj < ccount - 1))
{
Console.WriteLine("No");
return;
}
}
}
}
Console.WriteLine("Yes");
for (int i = 0; i < n; i++) Console.Write(letter[i]);
}
public static void Run()
{
ConsoleScanner cs = new ConsoleScanner();
double d = cs.NextInt(), L = cs.NextInt(), v1 = cs.NextInt(), v2 = cs.NextInt();
Console.WriteLine(((L - d) / (v1 + v2)).ToString().Replace(",", "."));
}
