Submission #3887263

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef double D;
typedef pair<ll,ll> P;
#define M 1000000007
#define F first
#define S second
#define PB push_back
#define INF 100000000000000000
int par[200005],n,q;
int find(int a){
	if(a==par[a])return a;
	return par[a]=find(par[a]);
}
bool same(int a,int b){
	a=find(a);
	b=find(b);
	return a==b;
}
void unit(int a,int b){
	a=find(a);
	b=find(b);
	par[a]=b;
}
int main(void){
    scanf("%d%d",&n,&q);
    for(int i=0;i<n*2;i++)par[i]=i;
    while(q--){
		int w,x,y,z;
		scanf("%d%d%d%d",&w,&x,&y,&z);
		x--,y--;
		if(w==1){
			if(z%2==0){
				unit(x,y);
				unit(x+n,y+n);
			}else{
				unit(x,y+n);
				unit(x+n,y);
			}
		}else{
			if(same(x,y))printf("YES\n");
			else printf("NO\n");
		}
	}
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:27:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&q);
                        ^
./Main.cpp:31:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d%d",&w,&x,&y,&z);
                                ^

Judge Result