2024广东省赛 I.不等式

题目

#include <bits/stdc++.h>
using namespace std;
#define int long long

#define pb push_back

#define fi first

#define se second

#define lson p << 1

#define rson p << 1 | 1

#define ll long long

const int maxn = 1e6 + 5, inf = 1e9, maxm = 4e4 + 5, base = 37;
const int N = 4e3;
const int mod = 1e9 + 7;
// const int mod = 998244353;
// const __int128 mod = 212370440130137957LL;

int n, m;
int a[maxn];

//long long ? maxn ? n? m?
void solve(){
    ll res = 0;
    cin >> n >> m;
    vector<vector<int>> G(n + 1);
    vector<vector<pair<int, int>>> req(n + 1);
    vector<int> ind(n + 1), f(n + 1, 1);
    for(int i = 1; i <= m; i++){
        int x, y, z;
        cin >> x >> y >> z;
        G[y].pb(x);
        G[z].pb(x);
        ind[x] += 2;
        req[x].pb({y, z});
    }