Submission #1191624

#	Time	Username	Problem	Language	Result	Execution time	Memory
1191624		SmuggingSpun	3D Histogram (COCI20_histogram)	C++20	20 / 110	18 ms	1860 KiB

histogram

#include<bits/stdc++.h>
#define taskname "C"
using namespace std;
typedef long long ll;
const int lim = 2e5 + 5;
const int INF = 1e9;
template<class T>void minimize(T& a, T b){
	if(a > b){
		a = b;
	}
}
template<class T>void maximize(T& a, T b){
	if(a < b){
		a = b;
	}
}
int n, a[lim], b[lim];
namespace sub1{
	void solve(){
		ll ans = 0;
		for(int i = 1; i <= n; i++){
			int A = INF, B = INF;
			for(int j = i; j <= n; j++){
				minimize(A, a[j]);
				minimize(B, b[j]);
				maximize(ans, 1LL * (j - i + 1) * A * B);
			}
		}
		cout << ans;
	}
}
namespace sub2{
	void solve(){
		
	}
}
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	if(fopen(taskname".inp", "r")){
		freopen(taskname".inp", "r", stdin);
	}
	cin >> n;
	for(int i = 1; i <= n; i++){
		cin >> a[i] >> b[i];
	}
	if(n <= 2000){
		sub1::solve();
	}
	else{
		sub2::solve();
	}
}

Compilation message (stderr)

histogram.cpp: In function 'int main()':
histogram.cpp:40:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |                 freopen(taskname".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 0 / 90