Submission #370220

#	Time	Username	Problem	Language	Result	Execution time	Memory
370220		soroush	Ili (COI17_ili)	C++17	49 / 100	4070 ms	12964 KiB

ili

#pragma GCC optimize("O3")
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int maxn = 1e4 + 10;

#define pb push_back
#define migmig ios::sync_with_stdio(false),cin.tie(0),cout.tie(0)
#define ms(x , y) memset(x , y , sizeof x)
#define dokme(x) cout << x, exit(0);

int n , m;
string s;

char c[maxn][2];
int a[maxn][2];
vector < int > ans[2];

bitset < maxn > x[maxn] , zero;

bool chk(int pos){
	if(x[pos].count() > 8000){
		x[pos].flip();
		for(int i : ans[1]){
			bool ok = 0;
			for(int j = x[pos]._Find_first() ; j < maxn ; j = x[pos]._Find_next(j))
				if(x[i][j]){
					ok = 1;
					break;
				}
			if(!ok)return(0);
		}
	}
	else{
		for(int i : ans[1]){
			bool ok = 0;
			for(int j = x[i]._Find_first() ; j < maxn ; j = x[i]._Find_next(j))
				if(x[pos][j] == 0){
					ok = 1;
					break;
				}
			if(!ok)return(0);
		}
	}
	return(1);
}

int32_t main(){
	migmig;
	cin >> n >> m >> s;
	s = "6" + s;
	for(int i = 1 ; i <= m ; i ++){
		for(int j = 0 ; j < 2 ; j ++){
			cin >> c[i][j] >> a[i][j] , a[i][j] += ((c[i][j] == 'c') ? n : 0);
			if(a[i][j] <= n)x[i][a[i][j]] = 1;
			else
				for(int v = x[a[i][j] - n]._Find_first() ; v < maxn ; v = x[a[i][j] - n]._Find_next(v))
					x[i][v] = 1;
		}
		if(s[i] == '0')ans[0].pb(i);
		if(s[i] == '1')ans[1].pb(i);
	}
	for(int i : ans[0])
		zero |= x[i];
	for(int i = 1 ; i <= m ; i ++){
		x[i] ^= (zero & x[i]);
		if(x[i].count() == 0 and s[i] == '?')
			s[i] = '0';
	}
	for(int i = 1 ; i <= m ; i ++)if(s[i] == '?'){
		if(!chk(i))	
			s[i] = '1';
	}
	for(int i = 1 ; i <= m ; i ++)
		cout << s[i];
	return(0);
}

• Subtask 1: 7 / 7
• Subtask 2: 42 / 42
• Subtask 3: 0 / 51