Submission #3725

#	Time	Username	Problem	Language	Result	Execution time	Memory
3725		waps12b	Make superpalindrome! (kriii1_M)	C++98	0 / 1	4 ms	2216 KiB

M

#include<string>
#include<iostream>
#include<algorithm>
using namespace std;




//s보다 사전순 같거나 앞에 있으면서 슈퍼팰린드롬
string make(string s){
	//1인 경우는 볼 필요 없다.
	if(s.length() == 1)	return s;
	int len = s.length();
	bool sw = false;
	for(int i=0; i< (len+1)/2;i++){
		char &l = s[i];
		char &r = s[len - i - 1];
		if( l < r )
			sw = true;
		r = l;
	}
	if(sw){
		for(int i= (len+1)/2 -1; i>=0; i--){
			char &l = s[i];
			char &r = s[len - i - 1];
			if( l != 'z'){
				l++;
				r= l;
				break;
			}
			l = r = 'a';
		}
	}
	string ans = make(s.substr(0,len/2));
	string ar = ans;
	reverse(ar.begin(),ar.end());
	if(len&1){
		if(ans > s.substr(0,len/2))
			s[(len)/2] = 'a';
		
		return ans + s[(len)/2] + ar;
	}
	return ans + ar;
}

int main(){
	string s;
	cin >> s ;
	for(int i=s.length()-1;i>=0;i--){
		if(s[i] !='z'){
			s[i] ++;
			break;
		}
		s[i] = 'a';
	}
	cout << make(s) << endl;
	return 0;
}

• Subtask 1: 0 / 1