제출 #217978

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
217978	2020-03-31 11:32:07	Vimmer	철인 이종 경기 (APIO18_duathlon)	C++14	23 / 100	1116 ms	1048580 KiB

count_triplets

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#include <bits/stdc++.h>
#define F first
#define S second
#define sz(x) int(x.size())
#define pb push_back
#define N 100005
#define M ll(998244353)
using namespace std;
typedef long double ld;
typedef long long ll;
typedef short int si;
vector <int> g[N];
bool mk[N], mkr[N];
int i, j, n, m;
ll anser, siz[N], kol;
void calc(int v, int p)
{
    if (p != -1) {siz[p] -= siz[v]; siz[v] += siz[p];}
    for (auto it : g[v]) anser += (siz[v] - 1 - siz[it]) * siz[it];
 
 
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