Submission #939122

#	Time	Username	Problem	Language	Result	Execution time	Memory
939122		vjudge1	Palindromic Partitions (CEOI17_palindromic)	C++14	60 / 100	10061 ms	10204 KiB

palindromic

///*                                                    __                    __                        __                    */
///*        ======     _      /| /|  __   _            /   |  |   /|  |   @  |    |  |  | /   /| |\  | /   |  |  @ | /        */
///* \-       ||  |_| |_     / |/ | |  | |_  |-        |   |--|  /-|  |   |  \ \  |==|  |-   /=| | \ | |   |--|  | |-         */
///*          ||  | | |_    /     | |__|  _| |_        \__ |  | /  |  |__ |  __|  |  |  | \ /  | |  \| \__ |  |  | | \        */
///* 
 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define ff first
#define ss second
#define int long long
typedef vector<int> vi;
typedef vector<double> vd;
typedef pair<int,int> pii;
typedef vector<pii> vii;
const int N = 3e5+50, inf = 1e18, mod = 1e9+7;

void solve(){
	string s;
	cin >> s;
	int n = s.size(), ans = 0;
	map<char, vi> mp;
	for(int i = n/2; i < n; i++){
		mp[s[i]].pb(i);
	}
	int l = 0, r = n;
	while(l < r){
		while(mp[s[l]].size() > 0 && mp[s[l]].back() >= r){
			mp[s[l]].pop_back();
		}
		bool ok = 0;
		for(int i = mp[s[l]].size()-1; i >= 0; i--){
			int x = mp[s[l]][i];
			int len = r-x;
			bool eq = 1;
			for(int it1 = l, it2 = x; it2 < x+len; it1++,it2++){
				if(s[it1] != s[it2]){
					eq = 0;break;
				}
			}
			if(eq){
				ok = 1;
				ans += 2;
				ans -= (x == l);
				l += len;
				r -= len;
				break;
			}
		}
		//cout << l << ' ' << r << '\n';
		if(!ok){
			ans++;
			break;
		}
	}
	cout << ans << '\n';
}
main(){
	ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
	int test = 1;
	cin >> test;
	while(test--){
		solve();
	}
}
 
 
 
 
 
 
 
 
 
 
 
 
 

Compilation message (stderr)

palindromic.cpp:60:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   60 | main(){
      | ^~~~

• Subtask 1: 15 / 15
• Subtask 2: 20 / 20
• Subtask 3: 25 / 25
• Subtask 4: 0 / 40