题解 | #单词替换#

#include <iostream>
using namespace std;
string s[110], a, b;
int main() {
    int cnt = 0;
    while(cin >> s[++cnt]){}
    cnt--;
    a = s[cnt - 1];
    b = s[cnt];
    int i;
    for (i = 1; i <= cnt - 2; i++)
    {
        if(s[i] == a)
        {
            cout << b << " ";
        }
        else 
        {
            cout << s[i] << " ";
        }
    }
}