Submission #3565372

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Source Code Expand

#include <iostream>
#include <cstdio>
using namespace std;
int n,m;
int fa[1000100];
int find(int x)
{
	if(x==fa[x])
		return x;
	return fa[x]=find(fa[x]);
}
int main()
{
	scanf("%d%d",&n,&m);
	for(int i=1; i<=n; i++)
		fa[i]=i;
	for(int i=1; i<=m; i++)
	{
		int a,b,c;
		scanf("%d%d%d",&a,&b,&c);
		int X=find(b),Y=find(c);
		if(a==0)
			fa[X]=Y;
		else
		{
			if(X!=Y)
				printf("No\n");
			else
				printf("Yes\n");
		}
	}
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:14:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
./Main.cpp:20:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d",&a,&b,&c);
                           ^

Judge Result