UVA Machined Surfaces

#include<stdio.h>
#include<string.h>

const int INF=100;

int main()
{
    int n;
    int ans,i,j;
    char ss[100][30];
    int num[100];
    while(scanf("%d",&n) && n)
    {
        getchar();
        ans=0;
        memset(num,0,sizeof(num));
        int min=INF;
        for (i=0;i<n;i++)
        {
            gets(ss[i]);
            for (j=0;ss[i][j];j++)
            {
                if(ss[i][j]==' ') num[i]++;
            }
            if(min>num[i]) min=num[i];
        }
        for (i=0;i<n;i++)
        {
            ans+=num[i]-min;
        }
        printf("%d\n",ans);
    }
    return 0;
}