Submission #63051

#	Time	Username	Problem	Language	Result	Execution time	Memory
63051		khohko	Match (CEOI16_match)	C++17	0 / 100	2 ms	376 KiB

match

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define fr first
#define sc second
#define ARRS ((ll)(2e6+500))
#define MAX ((ll)(1e9+100))
#define MOD ((ll)1e9+7)
#define mi(a,b) a=min((a),(b))

ll n,m,k,p,l,r,q;

	ll c[400];

int main(){
	#ifdef KHOKHO
			freopen("in.in","r",stdin);
			freopen("out.out","w",stdout);
	#endif
	string s;
	cin>>s;
	for(int i=0; i<s.size(); i++){
		c[s[i]]++;
	}
	for(int i='a'; i<'z'; i++){
//		cout<<(char)i<<" "<<c[i]<<endl;
		if(c[i]&1){
			cout<<-1;
			return 0;
		}
		else c[i]/=2;
	}
	string pas;
	for(int i=0; i<s.size(); i++){
		if(c[s[i]])pas+="(",c[s[i]]--;
		else pas+=")";
	}
//	cout<<pas<<endl;
	stack<ll> sk;
	for(int i=0; i<s.size(); i++){
		if(pas[i]=='(')sk.push(i);
		else if(s[i]!=s[sk.top()]){
			cout<<-1;
			return 0;
		}
		else
			sk.pop();
	}
	cout<<pas;
}

Compilation message (stderr)

match.cpp: In function 'int main()':
match.cpp:23:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<s.size(); i++){
               ~^~~~~~~~~
match.cpp:24:9: warning: array subscript has type 'char' [-Wchar-subscripts]
   c[s[i]]++;
         ^
match.cpp:35:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<s.size(); i++){
               ~^~~~~~~~~
match.cpp:36:12: warning: array subscript has type 'char' [-Wchar-subscripts]
   if(c[s[i]])pas+="(",c[s[i]]--;
            ^
match.cpp:36:29: warning: array subscript has type 'char' [-Wchar-subscripts]
   if(c[s[i]])pas+="(",c[s[i]]--;
                             ^
match.cpp:41:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<s.size(); i++){
               ~^~~~~~~~~

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