题目描述

blablabla

样例

blablabla

C++ 代码

#include<cstdio>
#include<iostream>
#include<string.h>
#include<vector>
#include<cstring>
#include<algorithm>
using namespace std;


int main(){

    char sentence[1024];
    scanf("%s",&sentence);
    char *tokenPtr=strtok(sentence,",");//sentence必须是一个char数组，不能是定义成指针形式
    string s[3];
    for (int i = 0; i < 3; ++i) {
        s[i]=tokenPtr;
        tokenPtr= strtok(NULL,",");
    }
    int pos=0;
    if((pos=s[0].find(s[1]))==string::npos){
        cout<<-1<<endl;
        return 0;
    }
    int pos1=0;
    if((pos1=s[0].rfind(s[2]))==string::npos){
        cout<<-1<<endl;
        return 0;
    }
  // cout<<pos<<"  "<<pos1<<endl;
    if(pos1-pos<=0||pos1-pos<s[1].length())
        {cout<<-1<<endl;
            return 0;
        }
    cout<<pos1-pos-s[1].length()<<endl;

    return 0;
}