> #include <iostream>
> #include <vector>
> #include <stdio.h>
> using namespace std;
> 
> vector<int> idx[50001];
> 
> int main() {
> 	int N, K;
> 	//cin >> N >> K;
> 	scanf("%d%d", &N, &K);
> 	int jiahua = 0;
> 	int zu[50001];
> 	for(int i = 1; i <= N; i++) zu[i] = i;
> 	int state[50001] = {0};
> 	for(int i = 1; i <= N; i++) idx[i].push_back(i);
> 	for(int i = 0; i < K; i++){
> 		int zl, X, Y;
> 		//cin >> zl >> X >> Y;
> 		scanf("%d%d%d", &zl, &X, &Y);
> 		if(X <= 0 || X > N || Y <= 0 || Y > N || (zl == 2 && X == Y)){
> 			jiahua++;
> 			continue;
> 		}
> 		if(zu[X] == zu[Y]){
> 			if((zl == 1 && state[X] != state[Y]) || (zl == 2 && state[Y] != (state[X] + 1)%3)){
> 				jiahua++;
> 			}
> 			continue;
> 		}
> 		int Xnum = idx[zu[X]].size(), Ynum = idx[zu[Y]].size();
> 		int zux = zu[X], zuy = zu[Y];
> 		int offset = 0;
> 		if(Xnum >= Ynum){
> 			//全部弄到X这边来
> 			if(zl == 1) offset = (state[X] + 3 - state[Y]) % 3;
> 			else offset = (state[X] + 4 - state[Y]) % 3;
> 			for(int j = 0; j < Ynum; j++){
> 				zu[idx[zuy][j]] = zux;
> 				state[idx[zuy][j]] = (state[idx[zuy][j]] + offset) % 3;
> 				idx[zux].push_back(idx[zuy][j]);
> 			}
> 		}
> 		else{
> 			if(zl == 1) offset = (state[Y] + 3 - state[X]) % 3;
> 			else offset = (state[Y] + 2 - state[X]) % 3;
> 			for(int j = 0; j < Xnum; j++){
> 				zu[idx[zux][j]] = zuy;
> 				state[idx[zux][j]] = (state[idx[zux][j]] + offset) % 3;
> 				idx[zuy].push_back(idx[zux][j]);
> 			}
> 		}
> 	}
> 	cout << jiahua << endl;
> 	return 0;
> }
为什么cin输入超时