UVaOJ 414 - Machined Surfaces

#include 
#include 
int main(){
	char buf[30];
	memset(buf, '\0', sizeof(buf));
	int n = 0;
	while(~scanf("%d", &n) && n){
		fgets(buf, sizeof(buf), stdin);
		int sum = 0;
		int min = 65535;
		for(int i = 0; i < n; ++i){
			fgets(buf, sizeof(buf), stdin);//可以直接用不安全的gets(buf);
			int len = 0;
			char *tmp = buf;
			while(*tmp++ == 'X');
			--tmp;//就是这个地方忘记回退多走的一步指针，之前就没得到AC
			while(*tmp++ == ' '){
				++len;
			}
			if(len < min){
				min = len;
			}
			sum += len;
			len = 0;
			memset(buf, '\0', sizeof(buf));
		}
		printf("%d\n", sum - min * n);
	}
	return 0;
}