oj.uz

Submission #674180

# Submission time Handle Problem Language Result Execution time Memory
674180 2022-12-23T11:38:56 Z QwertyPi Maxcomp (info1cup18_maxcomp) C++14
100 / 100
 384 ms 45220 KB 
#include <bits/stdc++.h>
#define int long long
#define fi first
#define se second
#define pii pair<int, int>
using namespace std;

const int MOD = 1e9 + 7;
const int MAXN = 1e5 + 11;
const int B = 800;

int a[1001][1001];
int mx[1001][1001];
bool vis[1001][1001];

int dx[4] = {1, -1, 0, 0}, dy[4] = {0, 0, 1, -1};

int n, m; 
bool in(int i, int j){
	return 0 <= i && i < n && 0 <= j && j < m;
}

vector<pair<int, int>> dq[2001];
int32_t main(){
	cin >> n >> m;
	for(int i = 0; i < n; i++){
		for(int j = 0; j < m; j++){
			cin >> a[i][j];
			mx[i][j] = a[i][j];
		}
	}

	int _mx = 0;
	for(int i = 0; i < n; i++){
		for(int j = 0; j < m; j++){
			_mx = max(_mx, a[i][j]);
		}
	}
	
	for(int i = 0; i < n; i++){
		for(int j = 0; j < m; j++){
			if(mx[i][j] >= _mx - n - m) dq[n + m + mx[i][j] - _mx].push_back({mx[i][j], i * m + j});
		}
	}
	for(int k = n + m; k >= 0; k--){
		for(auto t : dq[k]){
			int i = t.se / m, j = t.se % m, val = t.fi;
			if(mx[i][j] != val || vis[i][j]) continue; vis[i][j] = true;
			for(int dir = 0; dir < 4; dir++){
				if(in(i + dx[dir], j + dy[dir]) && mx[i + dx[dir]][j + dy[dir]] < mx[i][j] - 1){
					mx[i + dx[dir]][j + dy[dir]] = mx[i][j] - 1;
					int ni = i + dx[dir], nj = j + dy[dir];
					dq[n + m + mx[i + dx[dir]][j + dy[dir]] - _mx].push_back({mx[i + dx[dir]][j + dy[dir]], ni * m + nj});
				}
			}
		}
	}
	
	int ans = -1;
	for(int i = 0; i < n; i++){
		for(int j = 0; j < m; j++){
			ans = max(ans, mx[i][j] - a[i][j] - 1);
		}
	}
	cout << ans << endl;
}

Compilation message

maxcomp.cpp: In function 'int32_t main()':
maxcomp.cpp:48:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   48 |    if(mx[i][j] != val || vis[i][j]) continue; vis[i][j] = true;
      |    ^~
maxcomp.cpp:48:47: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   48 |    if(mx[i][j] != val || vis[i][j]) continue; vis[i][j] = true;
      |                                               ^~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 2 ms 804 KB Output is correct
10 Correct 2 ms 876 KB Output is correct
11 Correct 2 ms 852 KB Output is correct
12 Correct 2 ms 852 KB Output is correct
13 Correct 2 ms 852 KB Output is correct
14 Correct 1 ms 852 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 2 ms 804 KB Output is correct
13 Correct 2 ms 876 KB Output is correct
14 Correct 2 ms 852 KB Output is correct
15 Correct 2 ms 852 KB Output is correct
16 Correct 2 ms 852 KB Output is correct
17 Correct 1 ms 852 KB Output is correct
18 Correct 366 ms 37320 KB Output is correct
19 Correct 363 ms 43724 KB Output is correct
20 Correct 347 ms 41696 KB Output is correct
21 Correct 384 ms 45148 KB Output is correct
22 Correct 357 ms 45220 KB Output is correct
23 Correct 362 ms 45128 KB Output is correct
24 Correct 372 ms 44732 KB Output is correct