足以秒杀的一道题.

1 #include 
     
       2 #include 
      
        3 using namespace std; 4  5 int a[110] = {
   0}; 6  7 int main() 8 { 9     int n = 0, d = 0;10     scanf("%d%d", &n, &d);11     for (int i = 0; i < n; ++i) {12         scanf("%d", &a[i]);13     }14     int m = 0;15     scanf("%d", &m);16     int re = 0;17     sort(a, a + n);18     int t = 0;19     if (m < n) {20         t = m;21     } else {22         t = n;23         re -= d * (m - n);24     }25     for (int i = 0; i < t; ++i) {26         re += a[i];27     }28     printf("%d\n", re);29     return 0;30 }