Submission #3046228

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Source Code Expand

#include<stdio.h>

int N,Q;
int P[200000],A[200000],B[200000];
int data[100000];

void init_data();
int root(int a);
void unite(int a,int b);
int query(int a,int b);

int main(){
	scanf("%d %d",&N,&Q);
	for(int i=0;i<Q;i++)scanf("%d %d %d",&P[i],&A[i],&B[i]);
	
	init_data();
	
	for(int i=0;i<Q;i++){
		if(P[i]==0)unite(A[i],B[i]);
		else {
			if(query(A[i],B[i])==1)printf("Yes\n");
			else printf("No\n");
		}
	}
	
	return 0;
}

void init_data(){
	for(int i=0;i<100000;i++)data[i]=i;
}

int root(int a){
	if(data[a]==a)return a;
	else return data[a]=root(data[a]);
}

void unite(int a,int b){
	a=root(a);
	b=root(b);
	if(a==b)return;
	
	data[a]=b;
}

int query(int a,int b){
	if(root(a)==root(b))return 1;
	else return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:13:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&N,&Q);
  ^
./Main.c:14:22: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
  for(int i=0;i<Q;i++)scanf("%d %d %d",&P[i],&A[i],&B[i]);
                      ^

Judge Result