A
link
先输出前\(k\)个,再输出\(x\),最后输出后面的。
点击查看代码
#include<bits/stdc++.h>using namespace std;int n,k,x;signed main(){cin >> n >> k >> x;for(int i = 1;i <= n;++ i){int a;cin >> a;cout << a << " ";if(i == k) cout << x << " ";} return 0;}
B
[link](https://atcoder.jp/contests/abc361/tasks/abc361_b)