题解 | #单词替换#

#include <iostream>
#include <vector>
#include <string>
using namespace std;

int main() 
{
    ios::sync_with_stdio(false);
    vector<string> bags;
    string temp;
    int nsize;
    while (cin >>temp) 
  
        bags.push_back(temp);

    nsize=bags.size();
    for(int i=0;i<nsize-3;++i)
    {
        if(bags[i]==bags[nsize-2])
            cout<<bags[nsize-1]<<" ";
        else
            cout<<bags[i]<<" ";
    }
    if(bags[nsize-3]==bags[nsize-2])
        cout<<bags[nsize-1]<<endl;
    else
        cout<<bags[nsize-3]<<endl;

}
// 64 位输出请用 printf("%lld")