Comet OJ - Contest #11 A 水题

Code:

#include <bits/stdc++.h>
#define N 3000000
using namespace std;
char str[N];
int main()
{
    int minv=10,cur,len;
    scanf("%s",str+1),len=strlen(str+1);
    for(int i=1;i<=len;++i)
    {
        minv=min(minv, str[i]-'0');
        cur=str[i]-'0';
    }
    printf("%d\n",(minv-cur+10)%10);
    return 0;
}