Submission #1159664

#	Time	Username	Problem	Language	Result	Execution time	Memory
1159664		dzuizz	3D Histogram (COCI20_histogram)	C++20	20 / 110	2597 ms	59460 KiB

histogram

#include<bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	int n; cin>>n;
	int a[n],b[n];
	for(int i=0;i<n;++i){
		cin>>a[i]>>b[i];
	}
	int sta[n][18],stb[n][18];
	for(int i=0;i<n;++i)
		sta[i][0]=a[i],stb[i][0]=b[i];
	for(int j=0;j<17;++j)
		for(int i=0;i<=n-(1<<j);++i)
			sta[i][j+1]=min(sta[i][j],sta[i+(1<<j)][j]),
			stb[i][j+1]=min(stb[i][j],stb[i+(1<<j)][j]);
	int ans=0;
	for(int i=0;i<n;++i){
		for(int j=i;j<n;++j){
			int k=log2(j-i+1);
			int x=min(sta[i][k],sta[j-(1<<k)+1][k]);
			int y=min(stb[i][k],stb[j-(1<<k)+1][k]);
			ans=max(ans,x*y*(j-i+1));
		}
	}
	cout<<ans<<'\n';
	return 0;
}

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