sgu163

大水题
题目长度似乎与思考难度成反比。。。

直接贴代码了

#include <cmath>
#include <cstdio>

int main()
{
#ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif

    int n, m, x;
    int a[10] = {0}, *cnt = a + 5;
    scanf("%d%d", &n, &m);
    for(int i = 1; i <= n; ++i)
    {
        scanf("%d", &x);
        cnt[x]++;
    }
    int ans = 0;
    for(int i = -3; i <= 3; ++i)
        if(pow(i, m) > 0)
            ans += pow(i, m) * cnt[i];
    printf("%d\n", ans);

#ifndef ONLINE_JUDGE
    fclose(stdin), fclose(stdout);
#endif
    return 0;
}