A30581.单词替换

STL万嵗！

#include <iostream>
#include <string>
#include <bits/stl_pair.h>
#include <vector>
using namespace std;
pair<string, string> mp;
vector<string> sent;

int main() {
    string wd;
    while (cin >> wd) sent.push_back(wd);
    mp.second = sent.back(); sent.pop_back();
    mp.first = sent.back(); sent.pop_back();
    for (string &wd:sent) {
        if (wd == mp.first) wd = mp.second;
        cout << wd << ' ';
    }
    return 0;
}