Submission #3240284

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Source Code Expand

#include<cstdio>
using namespace std;

const int N = 400;
const int M = 1e5;
bool f[N+2][N+2];
int a[M+2],b[M+2];
int n,m;

int main()
{
    scanf("%d%d",&n,&m);
    for(int i=1; i<=m; i++) scanf("%d%d",&a[i],&b[i]);
    for(int i=1; i<=n; i++)
    {
        f[i][i] = true;
        for(int j=m; j>=1; j--)
        {
            bool x = f[i][a[j]],y = f[i][b[j]];
            if(x && y) {f[i][0] = true; break;}
            if((!x) && y) {f[i][a[j]] = true;}
            else if(x && (!y)) {f[i][b[j]] = true;}
        }
    }
    int ans = 0;
    for(int i=1; i<=n; i++)
    {
        for(int j=i+1; j<=n; j++)
        {
            if(f[i][0] || f[j][0]) continue;
            bool ok = true;
            for(int k=1; k<=n; k++)
            {
				if(f[i][k] && f[j][k]) ok = false;
			}
			ans += (ok);
		}
	}
	printf("%d\n",ans);
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:12:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
                        ^
./Main.cpp:13:54: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     for(int i=1; i<=m; i++) scanf("%d%d",&a[i],&b[i]);
                                                      ^

Judge Result