Submission #198200

#	Time	Username	Problem	Language	Result	Execution time	Memory
198200		alishahali1382	Match (CEOI16_match)	C++14	10 / 100	22 ms	376 KiB

match

#include <bits/stdc++.h>
#pragma GCC optimize ("O2")
#pragma GCC optimize ("unroll-loops")
//#pragma GCC optimize("no-stack-protector,fast-math")

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<pii, int> piii;
typedef pair<ll, ll> pll;
#define debug(x) cerr<<#x<<'='<<(x)<<endl;
#define debugp(x) cerr<<#x<<"= {"<<(x.first)<<", "<<(x.second)<<"}"<<endl;
#define debug2(x, y) cerr<<"{"<<#x<<", "<<#y<<"} = {"<<(x)<<", "<<(y)<<"}"<<endl;
#define debugv(v) cerr<<#v<<" : ";for (auto x:v) cerr<<x<<' ';cerr<<endl;
#define all(x) x.begin(), x.end()
#define pb push_back
#define kill(x) return cout<<x<<'\n', 0;

const ld eps=1e-7;
const int inf=1000000010;
const ll INF=10000000000000010LL;
const int mod = 1000000007;
const int MAXN = 100010, LOG=20;

int n, m, k, u, v, x, y, t, a, b;
int A[MAXN];
vector<int> vec[26];
char ans[MAXN];
string S;

bool check(int mask){
	vector<int> stk;
	for (int i=n-1; ~i; i--){
		if (mask&(1<<i)){
			if (stk.empty() || S[stk.back()]!=S[i]) return 0;
			stk.pop_back();
		}
		else stk.pb(i);
	}
	return 1;
}

int main(){
	ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
	//freopen("match.in", "r", stdin);
	//freopen("match.out", "w", stdout);
	cin>>S;
	n=S.size();
	if (n&1) kill(-1)
	
	for (int mask=0; mask<(1<<n); mask++) if (__builtin_popcount(mask)==n/2 && check(mask)){
		for (int i=n-1; ~i; i--) cout<<(char)('('+((mask>>(i))&1));
		return 0;
	}
	kill(-1)
	
	return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 27
• Subtask 3: 0 / 63