题目描述

题目困难

样例

#include <iostream>
using namespace std;
int main()
{
    string a,b,c;
    char n;
    while(cin>>n,n!=',') a+=n;
    while(cin>>n,n!=',') b+=n;
    while(cin>>n) c+=n;
    if(a.size()<b.size() || a.size()<c.size()) puts("-1");
    else
    {
        int l=0;
        while(l+b.size()<=a.size())
        {
            int k=0;
            while(k<b.size())
            {
                if(a[k+l]!=b[k]) break;
                k++;
            }
            if(k==b.size()) break; 
            l++;
        }
        int r=a.size(); 
        while(r>=0) 
        {
            int k=0;
            while(k<c.size())
            {
                if(a[k+r]!=c[k]) break;
                k++;
            }
            if(k==c.size()) break;
            r--;
        }
        l+=b.size()-1;
        if(r>l) cout<<r-l-1<<endl; 
        else puts("-1");
    }
    return 0;
}