zoj 1339 Machined Surfaces

#include <cstring>#include <cstdio>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;        for(i=0; i<num; i++) j+=max-count[i];        printf("%dn",j);    }    return 0;}