Submission #701522

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
701522	2023-02-21 12:06:00	Abrar_Al_Samit	Duathlon (APIO18_duathlon)	C++17	23 / 100	1082 ms	1048576 KiB

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#include<bits/stdc++.h>
using namespace std;
 
const int nax = 1e5 + 2;
 
vector<int>g[nax];
int n, m;
long long ans = 0;
bool vis[nax];
int sub[nax];
 
int dfs1(int v, int p) {
  sub[v] = 1;
  vis[v] = 1;
  for(int u : g[v]) if(u!=p) {
    sub[v] += dfs1(u, v);
  }
  return sub[v];
}
long long C(int n, int r) {
  if(n<r) return 0;
  long long ret = 1;
  for(int i=n-r+1; i<=n; ++i) {
    ret *= i;
  }
  for(int i=1; i<=r; ++i) {
    ret /= i;
  }
  return ret;
 
 
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