oj.uz

Submission #373307

# Submission time Handle Problem Language Result Execution time Memory
373307 2021-03-04T04:33:39 Z sam571128 Selotejp (COCI20_selotejp) C++14
110 / 110
 80 ms 80620 KB 
#include <bits/stdc++.h>

#define int long long
#define fastio ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

using namespace std;

const int N = 1e3+5, M = 10;
int grid[N][M];
int dp[N][M][1<<M];

signed main(){
	fastio
	int n,m;
	cin >> n >> m;
	for(int i = 1;i <= n;i++){
		for(int j = 0;j < m;j++){
			char c;
			cin >> c;
			if(c=='#') grid[i][j] = 1;
		}
	}
	for(int mask = 1;mask < (1<<m);mask++) dp[0][m-1][mask] = 1e18;
	for(int i = 1;i <= n;i++){
		for(int mask = 0; mask < (1<<m);mask++){
			if(grid[i][0]){
				if(mask&1) dp[i][0][mask] = min(dp[i-1][m-1][mask],dp[i-1][m-1][mask^1]+1);
				else dp[i][0][mask] = min(dp[i-1][m-1][mask],dp[i-1][m-1][mask^1])+1;
			}else{
				if(mask&1) dp[i][0][mask] = 1e18;
				else dp[i][0][mask] = min(dp[i-1][m-1][mask],dp[i-1][m-1][mask^1]);
			}
		}
		for(int j = 1;j < m;j++){
			for(int mask = 0; mask < (1<<m); mask++){
				if(grid[i][j]){
					if(mask&(1<<j)){
						dp[i][j][mask] = min(dp[i][j-1][mask],dp[i][j-1][mask^(1<<j)]+1);
					}else{
						if(grid[i][j-1]&&(mask&(1<<j-1))==0) dp[i][j][mask] = min(dp[i][j-1][mask],dp[i][j-1][mask^(1<<j)]);
						else dp[i][j][mask] = min(dp[i][j-1][mask],dp[i][j-1][mask^(1<<j)])+1;
					}
				}else{
					if(mask&(1<<j)) dp[i][j][mask] = 1e18;
					else dp[i][j][mask] = min(dp[i][j-1][mask],dp[i][j-1][mask^(1<<j)]);
				}
			}
		}
	}
	int ans = 1e18;
	for(int mask = 0; mask < (1<<m); mask++){
		ans = min(dp[n][m-1][mask],ans);
	}
	cout << ans << "\n";
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:40:35: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   40 |       if(grid[i][j-1]&&(mask&(1<<j-1))==0) dp[i][j][mask] = min(dp[i][j-1][mask],dp[i][j-1][mask^(1<<j)]);
      |                                  ~^~

Subtask #1
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1004 KB Output is correct
2 Correct 57 ms 74220 KB Output is correct
3 Correct 20 ms 30060 KB Output is correct
4 Correct 45 ms 70380 KB Output is correct
5 Correct 61 ms 79372 KB Output is correct
6 Correct 62 ms 79596 KB Output is correct
7 Correct 61 ms 77548 KB Output is correct
8 Correct 57 ms 74220 KB Output is correct
9 Correct 58 ms 74604 KB Output is correct
10 Correct 65 ms 80620 KB Output is correct

Subtask #2
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1132 KB Output is correct
2 Correct 1 ms 1132 KB Output is correct
3 Correct 1 ms 1132 KB Output is correct
4 Correct 1 ms 1132 KB Output is correct
5 Correct 1 ms 1132 KB Output is correct
6 Correct 2 ms 1268 KB Output is correct
7 Correct 1 ms 620 KB Output is correct
8 Correct 1 ms 1132 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1004 KB Output is correct
2 Correct 57 ms 74220 KB Output is correct
3 Correct 20 ms 30060 KB Output is correct
4 Correct 45 ms 70380 KB Output is correct
5 Correct 61 ms 79372 KB Output is correct
6 Correct 62 ms 79596 KB Output is correct
7 Correct 61 ms 77548 KB Output is correct
8 Correct 57 ms 74220 KB Output is correct
9 Correct 58 ms 74604 KB Output is correct
10 Correct 65 ms 80620 KB Output is correct
11 Correct 2 ms 1132 KB Output is correct
12 Correct 1 ms 1132 KB Output is correct
13 Correct 1 ms 1132 KB Output is correct
14 Correct 1 ms 1132 KB Output is correct
15 Correct 1 ms 1132 KB Output is correct
16 Correct 2 ms 1268 KB Output is correct
17 Correct 1 ms 620 KB Output is correct
18 Correct 1 ms 1132 KB Output is correct
19 Correct 11 ms 19948 KB Output is correct
20 Correct 22 ms 32256 KB Output is correct
21 Correct 48 ms 72556 KB Output is correct
22 Correct 59 ms 78188 KB Output is correct
23 Correct 60 ms 77548 KB Output is correct
24 Correct 65 ms 77036 KB Output is correct
25 Correct 63 ms 78956 KB Output is correct
26 Correct 62 ms 75756 KB Output is correct
27 Correct 64 ms 76012 KB Output is correct
28 Correct 80 ms 78572 KB Output is correct