414 - Machined Surfaces

#include <cstring>#include <cstdio>//int cmp(const void *p1,const void *p2)//{//    return *(int*)p1<*(int*)p2;//}int main(){    int i,j,num,max;    int count[100];    char c;    while (scanf("%d",&num)!=EOF)    {        if(num==0)            break;        memset(count,0,sizeof(count));        max=0;        for(i=0; i<num; i++)        {            for(j=0; j<25; j++)            {                scanf("%c",&c);                if(c=='X')                    count[i]++;            }            getchar();            if(max<count[i])                max=count[i];        }        j=0;        //qsort(count,num,sizeof(int),cmp);        for(i=0; i<num; i++)            j+=max-count[i];        printf("%d\n",j);    }    return 0;}