oj.uz

Submission #576499

# Submission time Handle Problem Language Result Execution time Memory
576499 2022-06-13T06:48:42 Z amunduzbaev L-triominoes (CEOI21_ltriominoes) C++17
10 / 100
 1371 ms 8296 KB 
#include "bits/stdc++.h"
using namespace std;
 
#define ar array
 
const int N = 15;
const int M = 1005;
int dp[2][N][1 << N];
int is[N][M];
 
signed main(){
	ios::sync_with_stdio(0); cin.tie(0);
	
	int n, m, k; cin>>n>>m>>k;
	if(!k && (n > 10 || m > 10)){
		if(n > m) swap(n, m);
		if(n < 5){
			if(n * m % 6 == 0) cout<<"YES\n";
			else cout<<"NO\n";
		} else {
			if(n * m % 3 == 0) cout<<"YES\n";
			else cout<<"NO\n";
		}
		return 0;
	}
	vector<int> x(k), y(k);
	for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			is[i][j] = 1;
		}
	} 
	for(int i=0;i<k;i++){
		cin>>x[i]>>y[i]; x[i]--, y[i]--;
		is[x[i]][y[i]] = 0;
	}
	
	int ch[4][2] = {
		{0, 0},
		{-1, 0},
		{-1, 1},
		{0, 1}
	};
	int P[4] = {1, 0, -1, 0}, mas[4] = {14, 13, 11, 7};
	int mask = (!is[0][1]);
	for(int i=0;i<n;i++){
		if(!is[i][0]) mask |= (1 << (i + 1));
	}
	
	dp[0][1][mask] = 1;
	for(int i=0;i+1<m;i++){
		int c = i&1;
		memset(dp[!c], 0, sizeof dp[!c]);
		for(int j=1;j<n;j++){
			for(int mask=0;mask < (1 << (n + 1));mask++){
				if(!dp[c][j][mask]) continue;
				int us = 0;
				for(int t=0;t<4;t++){
					us |= (is[j + ch[t][0]][i + ch[t][1]] & (t < 3 ? !(mask >> (j + P[t]) & 1) : 1)) << t;
				}
				
				for(int t=0;t<4;t++){
					if((us & mas[t]) != mas[t]) continue;
					int m2 = mask;
					for(int l=0;l<4;l++){
						if(mas[t] >> l & 1){
							//~ assert(!(m2 >> (j + P[l]) & 1));
							m2 |= (1 << (j + P[l]));
						}
					}
					if(t == 1 && !(mask >> j & 1)) continue;
					if(t == 3){
						m2 ^= (1 << j);
						m2 |= (!is[j][i + 1]) << j;
					}
					
					if(j + 1 < n){
						dp[c][j + 1][m2] = 1;
					} else if(m2 >> n & 1) {
						m2 ^= (1 << n);
						m2 = m2 << 1 | (!is[0][i + 2]);
						dp[!c][1][m2] = 1;
					}
				}
				
				if(mask >> j & 1){
					int m2 = mask;
					if(j + 1 < n){
						m2 ^= (1 << j);
						m2 |= (!is[j][i+1]) << j;
						dp[c][j + 1][m2] = 1;
					} else if(m2 >> n & 1) {
						m2 ^= (1 << j) ^ (1 << n);
						m2 |= (!is[j][i+1]) << j;
						m2 = m2 << 1 | (!is[0][i + 2]);
						dp[!c][1][m2] = 1;
					}
				}
			}
		}
	}
	
	if(dp[(m-1)&1][1][(1 << (n + 1)) - 1]) cout<<"YES\n";
	else cout<<"NO\n";
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 4052 KB Output is correct
2 Correct 36 ms 4164 KB Output is correct
3 Correct 54 ms 4156 KB Output is correct
4 Correct 55 ms 4052 KB Output is correct
5 Correct 43 ms 4160 KB Output is correct
6 Correct 57 ms 4180 KB Output is correct
7 Correct 4 ms 4180 KB Output is correct
8 Correct 73 ms 4192 KB Output is correct
9 Correct 9 ms 4180 KB Output is correct
10 Correct 12 ms 4180 KB Output is correct
11 Correct 183 ms 4188 KB Output is correct
12 Correct 24 ms 4180 KB Output is correct
13 Correct 4 ms 4180 KB Output is correct
14 Correct 4 ms 4180 KB Output is correct
15 Correct 8 ms 4180 KB Output is correct
16 Correct 1298 ms 4196 KB Output is correct
17 Correct 200 ms 4188 KB Output is correct
18 Correct 676 ms 4192 KB Output is correct
19 Correct 64 ms 4180 KB Output is correct
20 Correct 1325 ms 4200 KB Output is correct
21 Correct 636 ms 4196 KB Output is correct
22 Correct 50 ms 4180 KB Output is correct
23 Correct 58 ms 4180 KB Output is correct
24 Correct 60 ms 4200 KB Output is correct
25 Correct 1356 ms 4200 KB Output is correct
26 Correct 1371 ms 4200 KB Output is correct
27 Correct 51 ms 4180 KB Output is correct

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Runtime error 7 ms 8276 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Runtime error 6 ms 8296 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# Verdict Execution time Memory Grader output
1 Runtime error 6 ms 8276 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 4052 KB Output is correct
2 Correct 36 ms 4164 KB Output is correct
3 Correct 54 ms 4156 KB Output is correct
4 Correct 55 ms 4052 KB Output is correct
5 Correct 43 ms 4160 KB Output is correct
6 Correct 57 ms 4180 KB Output is correct
7 Correct 4 ms 4180 KB Output is correct
8 Correct 73 ms 4192 KB Output is correct
9 Correct 9 ms 4180 KB Output is correct
10 Correct 12 ms 4180 KB Output is correct
11 Correct 183 ms 4188 KB Output is correct
12 Correct 24 ms 4180 KB Output is correct
13 Correct 4 ms 4180 KB Output is correct
14 Correct 4 ms 4180 KB Output is correct
15 Correct 8 ms 4180 KB Output is correct
16 Correct 1298 ms 4196 KB Output is correct
17 Correct 200 ms 4188 KB Output is correct
18 Correct 676 ms 4192 KB Output is correct
19 Correct 64 ms 4180 KB Output is correct
20 Correct 1325 ms 4200 KB Output is correct
21 Correct 636 ms 4196 KB Output is correct
22 Correct 50 ms 4180 KB Output is correct
23 Correct 58 ms 4180 KB Output is correct
24 Correct 60 ms 4200 KB Output is correct
25 Correct 1356 ms 4200 KB Output is correct
26 Correct 1371 ms 4200 KB Output is correct
27 Correct 51 ms 4180 KB Output is correct
28 Incorrect 0 ms 212 KB Output isn't correct
29 Halted 0 ms 0 KB -