Submission #1797571

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Source Code Expand

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

int comp(const void *a, const void *b)
{
    return *(int *)a - *(int *)b;
}

int main(int argc, char const *argv[])
{
    int n, k;
    scanf("%d %d", &n, &k);

    int *r = (int *) calloc(n, sizeof(int));
    for (int i = 0; i < n; ++i) {
        scanf("%d", &r[i]);
    }
    qsort(r, n, sizeof(int), comp);

    double rate = 0;
    for (int i = 0; i < k; ++i) {
        rate = (rate + r[n-k+i]) / 2;
    }
    printf("%.6lf\n", rate);
    return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:12:5: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &k);
     ^
./Main.c:16:9: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &r[i]);
         ^

Judge Result