Submission #10988505

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Source Code Expand

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
#include<cmath>
using namespace std;
int fa[10010];//fa[i]表示i的父亲，祖先的父亲即为自己
void init(){//初始化
    for(int i=0;i<10000;i++) {
        fa[i]=i;//每一个人都是他家族的祖先
    }
}
int find(int x){//找祖先 
    return fa[x]=fa[x]==x?x:find(fa[x]);
}
bool ask(int x,int y){//查询 
    return find(x)==find(y);//如果x的祖先也是y的祖先，那么他们就是亲戚 
}
void uni(int x,int y){//合并两个家族 
    fa[find(x)]=find(y);//让x的祖先当y的祖先的孩子，就完成了x,y两家族的合并 
}
int main(){
    int n,m,x,y,z;
    init();
    scanf("%d%d",&n,&m);
    for(int i=1;i<=m;i++){
        scanf("%d%d%d",&z,&x,&y);
        if(z==1) uni(x,y);
        else puts(ask(x,y)?"Y":"N");
    }
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:25:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
                        ^
./Main.cpp:27:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d",&z,&x,&y);
                                 ^

Judge Result