Submission #2827600

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Source Code Expand

#include <cstdio>
using namespace std;

int N, M;
int rel[410][410];

int main() {
    scanf("%d%d", &N, &M);
    for(int i=0; i<M; i++) {
        int x, y; scanf("%d%d", &x, &y);
        x--; y--;

        for(int z=0; z<N; z++) {
            if(rel[x][z]) rel[y][z] = true;
            if(rel[y][z]) rel[x][z] = true;
            if(rel[z][x]) rel[z][y] = true;
            if(rel[z][y]) rel[z][x] = true;
        }
        if(rel[y][y]) rel[x][x] = true;
        if(rel[x][x]) rel[y][y] = true;
        rel[x][y] = rel[y][x] = true;
    }

    int ans = 0;
    for(int i=0; i<N; i++) {
        for(int j=i+1; j<N; j++) {
            if(rel[i][i] || rel[j][j]) continue;
            if(!rel[i][j] && !rel[j][i]) {
                ans++;
            }
        }
    }
    printf("%d\n", ans);
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:8:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &N, &M);
                          ^
./Main.cpp:10:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         int x, y; scanf("%d%d", &x, &y);
                                        ^

Judge Result