Submission #549485

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
549485	2022-04-15T21:49:48 Z	sofapuden	Plus Minus (BOI17_plusminus)	C++14	100 / 100	172 ms	8236 KB

plusminus

#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

const ll MOD = 1e9+7;

ll pw(ll a, ll b){
	ll ret = 1;
	while(b){
		if(b&1)ret = ret * a % MOD;
		a = a * a % MOD;
		b >>= 1;
	}
	return ret;
}

int main(){
	int n, m, k; cin >> n >> m >> k;
	vector<pair<char,pair<int,int>>> v(k);
	for(int i = 0; i < k; ++i){
		cin >> v[i].first >> v[i].second.first >> v[i].second.second;
	}
	ll ans = 0;
	{
		map<int,int> M;
		bool ok = 1;
		for(int i = 0; i < k; ++i){
			int x = ((v[i].second.second&1)^(v[i].first == '+'))+1;
			if(M[v[i].second.first]){
				if(M[v[i].second.first] != x){
					ok = 0;
					break;
				}
			}
			M[v[i].second.first] = x;
		}
		if(ok)ans += pw(2,n-M.size());
		ans%=MOD;
	}
	{
		map<int,int> M;
		bool ok = 1;
		for(int i = 0; i < k; ++i){
			int x = ((v[i].second.first&1)^(v[i].first == '+'))+1;
			if(M[v[i].second.second]){
				if(M[v[i].second.second] != x){
					ok = 0;
					break;
				}
			}
			M[v[i].second.second] = x;
		}
		if(ok)ans += pw(2,m-M.size());
		ans%=MOD;
	}
	{
		bool ok = 1;
		for(int i = 0; i < k; ++i){
			if(((v[i].second.first+v[i].second.second)&1) ^ (v[i].first == '+')){
				ok = 0;
				break;
			}
		}
		ans-=ok;
	}
	{
		bool ok = 1;
		for(int i = 0; i < k; ++i){
			if(((v[i].second.first+v[i].second.second)&1) ^ (v[i].first == '-')){
				ok = 0;
				break;
			}
		}
		ans-=ok;
	}
	cout << (ans+MOD) % MOD << '\n';

}

Subtask #1

12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	1 ms	300 KB	Output is correct
5	Correct	0 ms	212 KB	Output is correct
6	Correct	1 ms	212 KB	Output is correct
7	Correct	1 ms	212 KB	Output is correct
8	Correct	1 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	1 ms	212 KB	Output is correct

Subtask #2

42.0 / 42.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	1 ms	300 KB	Output is correct
5	Correct	0 ms	212 KB	Output is correct
6	Correct	1 ms	212 KB	Output is correct
7	Correct	1 ms	212 KB	Output is correct
8	Correct	1 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	1 ms	212 KB	Output is correct
11	Correct	1 ms	304 KB	Output is correct
12	Correct	1 ms	212 KB	Output is correct
13	Correct	0 ms	212 KB	Output is correct
14	Correct	1 ms	212 KB	Output is correct
15	Correct	1 ms	212 KB	Output is correct
16	Correct	48 ms	2340 KB	Output is correct
17	Correct	50 ms	2380 KB	Output is correct
18	Correct	47 ms	2356 KB	Output is correct
19	Correct	76 ms	2352 KB	Output is correct
20	Correct	76 ms	2352 KB	Output is correct

Subtask #3

46.0 / 46.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	1 ms	300 KB	Output is correct
5	Correct	0 ms	212 KB	Output is correct
6	Correct	1 ms	212 KB	Output is correct
7	Correct	1 ms	212 KB	Output is correct
8	Correct	1 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	1 ms	212 KB	Output is correct
11	Correct	1 ms	304 KB	Output is correct
12	Correct	1 ms	212 KB	Output is correct
13	Correct	0 ms	212 KB	Output is correct
14	Correct	1 ms	212 KB	Output is correct
15	Correct	1 ms	212 KB	Output is correct
16	Correct	48 ms	2340 KB	Output is correct
17	Correct	50 ms	2380 KB	Output is correct
18	Correct	47 ms	2356 KB	Output is correct
19	Correct	76 ms	2352 KB	Output is correct
20	Correct	76 ms	2352 KB	Output is correct
21	Correct	134 ms	5580 KB	Output is correct
22	Correct	1 ms	296 KB	Output is correct
23	Correct	57 ms	2728 KB	Output is correct
24	Correct	56 ms	2720 KB	Output is correct
25	Correct	58 ms	2740 KB	Output is correct
26	Correct	110 ms	5836 KB	Output is correct
27	Correct	104 ms	5472 KB	Output is correct
28	Correct	113 ms	5992 KB	Output is correct
29	Correct	131 ms	6888 KB	Output is correct
30	Correct	172 ms	8236 KB	Output is correct