oj.uz

Submission #375588

# Submission time Handle Problem Language Result Execution time Memory
375588 2021-03-09T14:53:47 Z astoria The Kingdom of JOIOI (JOI17_joioi) C++14
100 / 100
 3692 ms 70636 KB 
#include "bits/stdc++.h"
using namespace std;

#define int long long
const int H=2005,W=2005;
int h,w,lo,hi;
int g[H][W];

bool check(int x){
	int losen=w+1;
	for(int i=1; i<=h; i++){
		int lopo=0;
		for(int j=1; j<=w; j++){
			if(lo+x < g[i][j]) break;
			lopo++;
		}
		losen=min(losen,lopo);
		int hipo=w+1;
		for(int j=w; j>=1; j--){
			if(hi-x > g[i][j]) break;
			hipo--;
		}
		if(losen + 1 < hipo) return 0;
	}
	return 1;
}

void flip_row(){
	for(int i=1; i<=h; i++){
		for(int j=1; j<=w/2; j++){
			swap(g[i][j],g[i][w-j+1]);
		}
	}
}

void flip_col(){
	for(int j=1; j<=w; j++){
		for(int i=1; i<=h/2; i++){
			swap(g[i][j],g[h-i+1][j]);
		}
	}
}

bool f(int x){
	bool an=0;
	if(check(x)) an=1;
	flip_row();
	if(check(x)) an=1;
	flip_col();
	if(check(x)) an=1;
	flip_row();
	if(check(x)) an=1;
	flip_col();
	return an;
}

int32_t main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL); cout.tie(NULL);
	cin>>h>>w;
	lo=1e9+500; hi=-1e6;
	for(int j=0; j<=w+1; j++) g[0][j]=0;
	for(int i=1; i<=h; i++){
		g[i][0]=0;
		for(int j=1; j<=w; j++){
			cin>>g[i][j];
			lo=min(lo,g[i][j]);
			hi=max(hi,g[i][j]);
		}
		g[i][w+1]=0;
	}
	for(int j=0; j<=w+1; j++) g[h+1][j]=0;
	
	int l=0, r=1e9+100;
	while(l<r){
		int m=l+((r-l)/2);
		if(f(m)) r=m;
		else l=m+1;
	}
	cout<<l;
	
	//checkc(5);
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 2 ms 364 KB Output is correct
16 Correct 14 ms 1516 KB Output is correct
17 Correct 13 ms 1772 KB Output is correct
18 Correct 11 ms 1772 KB Output is correct
19 Correct 11 ms 1900 KB Output is correct
20 Correct 9 ms 1644 KB Output is correct
21 Correct 12 ms 2028 KB Output is correct
22 Correct 10 ms 1900 KB Output is correct
23 Correct 10 ms 1900 KB Output is correct
24 Correct 9 ms 1644 KB Output is correct
25 Correct 10 ms 1900 KB Output is correct
26 Correct 10 ms 1900 KB Output is correct
27 Correct 12 ms 1900 KB Output is correct
28 Correct 12 ms 1900 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 2 ms 364 KB Output is correct
16 Correct 14 ms 1516 KB Output is correct
17 Correct 13 ms 1772 KB Output is correct
18 Correct 11 ms 1772 KB Output is correct
19 Correct 11 ms 1900 KB Output is correct
20 Correct 9 ms 1644 KB Output is correct
21 Correct 12 ms 2028 KB Output is correct
22 Correct 10 ms 1900 KB Output is correct
23 Correct 10 ms 1900 KB Output is correct
24 Correct 9 ms 1644 KB Output is correct
25 Correct 10 ms 1900 KB Output is correct
26 Correct 10 ms 1900 KB Output is correct
27 Correct 12 ms 1900 KB Output is correct
28 Correct 12 ms 1900 KB Output is correct
29 Correct 3470 ms 52356 KB Output is correct
30 Correct 3349 ms 53436 KB Output is correct
31 Correct 3637 ms 55020 KB Output is correct
32 Correct 3669 ms 55020 KB Output is correct
33 Correct 3034 ms 47980 KB Output is correct
34 Correct 3692 ms 55044 KB Output is correct
35 Correct 3625 ms 70624 KB Output is correct
36 Correct 3113 ms 65364 KB Output is correct
37 Correct 3550 ms 70636 KB Output is correct