제출 #610224

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
610224		kshitij_sodani	Match (CEOI16_match)	C++14	100 / 100	38 ms	4948 KiB

match

#include <bits/stdc++.h>
#define a first
#define b second
#define pb push_back
using namespace std;
typedef long long llo;

vector<int> pre[100001];
int it[100001];
int ans[100001];
int ind2[100001];
int co[100001];
int co2[100001];
int par[100001][20];
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);

	string s;

	cin>>s;
	int n=s.size();
	for(int i=0;i<s.size();i++){
		pre[s[i]-'a'].pb(i);
		it[i]=s[i]-'a';
	}
	for(int i=0;i<n;i++){
		ind2[i]=-1;
		if(i>0){
			int cur=i-1;
			while(cur>=0){

				if(it[cur]==it[i]){
					ind2[i]=cur;
					break;
				}
				
				if(ind2[cur]==-1){
					break;
				}
				cur=ind2[cur]-1;
			}
		}
	}


	
	vector<int> ss;
	vector<int> xx;
	for(int i=0;i<n;i++){
		//cout<<i<<":"<<endl;
		if(ss.size()){
			if(ss.back()==it[i]){
				vector<int> tt;
				//tt.pb(it[i]);
				int st=0;
				int cur=xx.back()-1;
				while(cur>i){
					if(it[cur]==it[i] and st==0){
						xx.pb(cur);
						st=1;
						cur--;
						continue;
					}
					cur=ind2[cur]-1;
				}

				if(cur!=i and st==1){
					st=0;
					xx.pop_back();
				}
				//cout<<i<<":"<<st<<","<<cur<<":"<<xx.back()<<endl;
				if(st==1){
					ss.pb(it[i]);
					ans[i]=1;
				}
				else{
					ss.pop_back();
					xx.pop_back();
					ans[i]=-1;
				}
				//cout<<i<<":"<<ans[i]<<","<<endl;
				continue;
			}
		}
		int cur=n-1;
		if(xx.size()){
			cur=xx.back()-1;
		}
		int st=0;
		while(cur>i){
			if(it[cur]==it[i]){
				st=1;
				xx.pb(cur);
				break;
			}
			else{
				cur=ind2[cur]-1;

			}
		}

		if(st==0){
			cout<<-1<<endl;
			return 0;
		}
		ss.pb(it[i]);
		ans[i]=1;
	}
	if(ss.size()!=0){
		cout<<-1<<endl;
		return 0;
	}
	for(int i=0;i<n;i++){
		if(ans[i]==1){
			cout<<'(';
		}
		else{
			cout<<')';
		}
	}
	cout<<endl;










	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

match.cpp: In function 'int main()':
match.cpp:23:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |  for(int i=0;i<s.size();i++){
      |              ~^~~~~~~~~

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