Submission #4039154

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Source Code Expand

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

#define rep(i, n) for(int i = 0; i < n; i++)
#define in_arr(type, a, n) for(int i = 0; i < n; i++) scanf(type, &((a)[i]));

int main(){
    int n, *a;
    scanf("%d", &n);
    a = (int *)malloc(n);
    for(int i = 0; i < n; ++i){
        scanf("%d", &a[i]);
    }
    for(int i = n - 1; i > 0; --i){
        for(int j = i; j < n; ++j){
            if(a[j] > a[j - 1]){
                int tmp = a[j];
                a[j] = a[j - 1];
                a[j - 1] = tmp;
            }
        }
    }
    int alice = 0, bob = 0;
    for(int i = 0; i < n; i += 2){
        alice += a[i];
    }
    for(int i = 1; i < n; i += 2){
        bob += a[i];
    }
    printf("%d\n", alice - bob);
    free(a);
    return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:10:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ^
./Main.c:13:9: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a[i]);
         ^

Judge Result