Submission #1462679

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;
map < int , int > is[1<<20];
int main(){
    int n , m;
    scanf("%d %d",&n,&m);
    for(int j = 1 ; j<= m ; j++){
        int a , b;
        cin>>a>>b;
        is[a][b] =1;
    }
    for(int j = 1 ; j <= n ; j++){
        if(is[1][j] && is[j][n]){
            puts("POSSIBLE");
            return 0;
        }
    }
    puts("IMPOSSIBLE");
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:6:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&n,&m);
                         ^

Judge Result