E. Mishap in Club

/*一道水题 ！！！*/

 1 #include <stdio.h>
 2 #include <string.h>
 3 #define N 310
 4 
 5 int main ()
 6 {
 7     char pop[N];
 8     int i,pop_len;
 9     while(scanf("%s",&pop)!=EOF)
10     {
11        pop_len=strlen(pop);
12        int jingqu=0;int chuqu=0;
13        int sum=0;
14        for(i=0;i<pop_len;i++)
15        {
16              if(pop[i]=='+') {if(chuqu>0){chuqu--;jingqu++;}else {jingqu++;sum++;}}
17              if(pop[i]=='-') {if(jingqu>0){chuqu++;jingqu--;}else {chuqu++;sum++;}}
18        }
19        printf("%d\n",sum);
20     }
21 }