oj.uz

Submission #315680

# Submission time Handle Problem Language Result Execution time Memory
315680 2020-10-23T16:27:35 Z Trickster Luxury burrow (IZhO13_burrow) C++14
100 / 100
 1347 ms 26876 KB 
#include <algorithm>
#include <string.h>
#include <iostream>
#include <stdio.h>
#include <vector>
#include <queue>
#include <cmath>
#include <set>
#include <map>
 
#define N 1010
#define ff first
#define ss second
#define ll long long
#define pb push_back
#define mod 1000000007
#define pii pair <int, int>
 
using namespace std;

int n, m, k;
int v[N][N];
int H[N][N];
pii p[N][N];

int main()
{
	cin >> n >> m >> k;
	
	for(int i = 1; i <= n; i++)
		for(int h = 1; h <= m; h++)
			cin >> v[i][h];
	
	int l = 1, md, r = 1e9, ans, sz;
	while(l <= r) {
		md = (l+r)/2;
		
		char c[N][N];
		for(int i = 1; i <= n; i++)
			for(int h = 1; h <= m; h++) {
				c[i][h] = '0';
				
				if(v[i][h] >= md) c[i][h] = '1';
			}
		
		for(int i = n; i >= 1; i--) {
			memset(H[i], 0, sizeof(H[i]));
			
			for(int h = 1; h <= m; h++) if(c[i][h] == '1') H[i][h] = H[i+1][h] + 1;
		}
		
		for(int i = 1; i <= n; i++) {
			vector <int> E;
			
			for(int h = 1; h <= m; h++) {
				p[i][h] = {0, m};
				
				while(!E.empty() && H[i][E.back()] > H[i][h]) {
					p[i][E.back()].ss = h-1;
					E.pop_back();
				}
				
				if(E.empty()) p[i][h].ff = 1;
				else {
					if(H[i][E.back()] == H[i][h]) p[i][h].ff = p[i][E.back()].ff;
					else p[i][h].ff = E.back()+1;
				}
				
				E.pb(h);
			}
		}
		
		int now = 0;
		for(int i = 1; i <= n; i++)
			for(int h = 1; h <= m; h++)
				now = max(now, H[i][h] * (p[i][h].ss - p[i][h].ff + 1));
		
		if(now >= k) {
			ans = md, sz = now;
			l = md+1;
		} else r = md-1;
	}
	
	cout << ans << " " << sz;
}
/*
3 3 3
1 1 1
1 2 2
1 2 2

1 10 5 
4 3 2 5 10 7 6 5 1 100

3 5 2
5 7 5 5 5
8 5 5 7 5
8 5 8 8 8
*/

Compilation message

burrow.cpp: In function 'int main()':
burrow.cpp:84:24: warning: 'sz' may be used uninitialized in this function [-Wmaybe-uninitialized]
   84 |  cout << ans << " " << sz;
      |                        ^~
burrow.cpp:84:17: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   84 |  cout << ans << " " << sz;
      |                 ^~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 640 KB Output is correct
5 Correct 2 ms 768 KB Output is correct
6 Correct 3 ms 896 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 11 ms 1792 KB Output is correct
9 Correct 24 ms 3200 KB Output is correct
10 Correct 58 ms 3576 KB Output is correct
11 Correct 92 ms 4600 KB Output is correct
12 Correct 52 ms 7288 KB Output is correct
13 Correct 71 ms 2552 KB Output is correct
14 Correct 148 ms 7288 KB Output is correct
15 Correct 147 ms 7400 KB Output is correct
16 Correct 184 ms 7892 KB Output is correct
17 Correct 172 ms 9208 KB Output is correct
18 Correct 454 ms 13304 KB Output is correct
19 Correct 437 ms 13944 KB Output is correct
20 Correct 917 ms 19552 KB Output is correct
21 Correct 972 ms 21752 KB Output is correct
22 Correct 1310 ms 26876 KB Output is correct
23 Correct 1347 ms 26836 KB Output is correct
24 Correct 682 ms 19320 KB Output is correct
25 Correct 719 ms 20088 KB Output is correct