Codeforces Round #687 (Div. 2, based on Technocup 2021 Elimination Round 2) A. Prison Break

• 题意:有一张\(n\)x\(m\)的图,图中每个点都关押着罪犯,在坐标\((r,c)\)处有一个出口,每名罪犯每秒可以可以像上下最有移动一个单位或者不动,问所有罪犯能够逃离监狱的最少时间.
• 题解:直接算四个顶点到出口的值求个最大即可.
• 代码:

#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define pb push_back
#define me memset
#define rep(a,b,c) for(int a=b;a<=c;++a)
#define per(a,b,c) for(int a=b;a>=c;--a)
const int N = 1e6 + 10;
const int mod = 1e9 + 7;
const int INF = 0x3f3f3f3f;
using namespace std;
typedef pair<int,int> PII;
typedef pair<ll,ll> PLL;

int t;
int n,m,r,c;

int main() {
    ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
	cin>>t;
	while(t--){
		cin>>n>>m>>r>>c;

		ll cnt1=r-1+c-1;
		ll cnt2=n-r+c-1;
		ll cnt3=r-1+m-c;
		ll cnt4=n-r+m-c;

		ll ans=max(cnt1,cnt2);
		ans=max(ans,cnt3);
		cout<<max(ans,cnt4)<<'\n';
	}

    return 0;
}