Submission #1120416

#	Time	Username	Problem	Language	Result	Execution time	Memory
1120416		mmdrzada	Plus Minus (BOI17_plusminus)	C++17	54 / 100	31 ms	16468 KiB

plusminus

#include <bits/stdc++.h>
 
using namespace std;

typedef vector<int> vi;
typedef vector<char> vc;
typedef pair<int, int> pii;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef vector<ll> vll;
 
#define sep ' '
#define F first
#define S second
#define fastIO   ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define pb push_back
#define kill(x) {cout << x << endl;return;}
#define sz(x) int(x.size())
#define SP(x) setprecision(x) 
#define mod(x) (1ll*x%M+M)%M
#define pq priority_queue
#define mid (l+r)/2
// #define mid2 (l+r+1)/2
#define pll pair<ll, ll>
#define REP(i, k) for (int i = 0 ; i < k ; i ++)
#define MP make_pair
#define int ll

const int M = 1e9+7;
const int N = 1000+1;
int n, m, k;
int t[N][N];
int r[N], c[N];

void solve() {
	cin >> n >> m >> k;
	memset(t, -1, sizeof t);
	assert(n <= 1000 && m <= 1000);
	for(int i = 0 ; i < k ; i ++) {
		char c; int x, y; cin >> c >> x >> y; x--, y--;
		t[x][y] = c == '+';
	}
	// -1 : undetermined
	//  0 : -
	// +1 : +
	int R = 1, C = 1;
	for(int i = 0 ; i < n && R ; i ++) {
		bool bad01 = false, bad10 = false;
		for(int j = 0 ; j < m && !bad01 ; j ++) { // 010101...
			if ((t[i][j] == 0 && j%2 == 1) || (t[i][j] == 1 && j%2 == 0)) bad01 = true;
		}
		for(int j = 0 ; j < m && !bad10 ; j ++) { // 101010...
			if ((t[i][j] == 0 && j%2 == 0) || (t[i][j] == 1 && j%2 == 1)) bad10 = true;
		}
		R = 1ll*R*(!bad01+!bad10)%M;
	}
	for(int j = 0 ; j < m && C > 0; j ++) {
		bool bad01 = false, bad10 = false;
		for(int i = 0 ; i < n && !bad01 ; i ++) { // 01010101
			if ((i%2 == 0 && t[i][j] == 1) || (i%2 == 1 && t[i][j] == 0)) bad01 = true;
		}
		for(int i = 0 ; i < n && !bad10 ; i ++) { // 101010
			if ((i%2 == 0 && t[i][j] == 0) || (i%2 == 1 && t[i][j] == 1)) bad10 = true;
		}
		C = 1ll*C*(!bad01+!bad10)%M;
	}
	bool bad0 = false, bad1 = false;
	for(int i = 0 ; i < n && !bad0 ; i ++) {
		for(int j = 0 ; j < m && !bad0 ; j ++) {
			if (((i+j)%2 == 0 && t[i][j] == 1) || ((i+j)%2 == 1 && t[i][j] == 0)) {
				bad0 = true;
			}
		}
	}
	for(int i = 0 ; i < n && !bad1 ; i ++) {
		for(int j = 0 ; j < m && !bad1 ; j ++) {
			if (((i+j)%2 == 1 && t[i][j] == 1) || ((i+j)%2 == 1 && t[i][j] == 1)) {
				bad1 = true;
			}
		}
	}
	cout << mod(0ll+R+C-(!bad0)-(!bad1)) << endl;
}

// check MAXN
int32_t main() {
	fastIO;
	solve();
	
	return 0;
}

• Subtask 1: 12 / 12
• Subtask 2: 42 / 42
• Subtask 3: 0 / 46