题解

我目前认为最简单的做法

#include <bits/stdc++.h>
using namespace std;
const int INF = 1e9;
int main(){
    int h1;
    cin >> h1;
    int ans = INF;
    for(int i = 1; i <= 3; i++){
        int h;
        cin >> h;
        if(abs(h1 - h) < abs(h1 - ans) or abs(h1 - h) == abs(h1 - ans) and h <= ans){
            ans = h;
        }
    }
    cout << ans;
    return 0;
}