为什么过不了！！！

 1 #include<stdio.h>
 2 
 3 int main()
 4 {
 5     int i;
 6     int fund;
 7     int a, b = 0, c, n;
 8     int end = 1, d = 0;
 9     double sum ;
10     for(i = 0; i < 12; i++){
11         scanf("%d", &fund);
12         a = 300 - fund + b;
13         if(a < 0){
14             end = 0;
15             n = i + 1;
16             n = -n;
17         }
18         b = a % 100;
19         c = a / 100 * 100;
20         d += c; 
21     }
22     if(end != 0){
23     sum = d * 1.2 + b;
24     printf("%.0f", sum);
25     }else{
26         printf("%d", n);
27     }
28       
29     return 0;
30 }#include<stdio.h>
31 
32 int main()
33 {
34     int i;
35     int fund;
36     int a, b = 0, c, n;
37     int end = 1, d = 0;
38     double sum ;
39     for(i = 0; i < 12; i++){
40         scanf("%d", &fund);
41         a = 300 - fund + b;
42         if(a < 0){
43             end = 0;
44             n = i + 1;
45             n = -n;
46         }
47         b = a % 100;
48         c = a / 100 * 100;
49         d += c; 
50     }
51     if(end != 0){
52     sum = d * 1.2 + b;
53     printf("%.0f", sum);
54     }else{
55         printf("%d", n);
56     }
57       
58     return 0;
59 }