Submission #309867

#	Time	Username	Problem	Language	Result	Execution time	Memory
309867		peuch	Palindromic Partitions (CEOI17_palindromic)	C++17	0 / 100	1 ms	256 KiB

palindromic

#include<bits/stdc++.h>
using namespace std;

const int MAXN = 1e6 + 10;

int t;
int n;
string st1;
int cnt = 26;

map<pair<int, int> , int> marc;
map<int, int> tam;

int main(){
	scanf("%d", &t);
	while(t--){
		cin >> st1;
		n = st1.size();
		
		pair<int, int> aux1 = make_pair(0, 0);
		pair<int, int> aux2 = make_pair(0, 0);
		
		int ans = 0;
		cnt = 26;
		marc.clear();
		for(int i = 1; i <= 26; i++){
			marc[make_pair(i, 0)] = i;
			marc[make_pair(0, i)] = i;
		}
		for(int i = 0; i < n / 2; i++){
			if(aux1.first == 0) aux1.first = st1[i] - 'a' + 2;
			else{
				if(marc[make_pair(aux1.second, st1[i] - 'a' + 2)] == 0) marc[make_pair(aux1.second, st1[i] - 'a' + 2)] = ++cnt;
				aux1 = make_pair(aux1.first, marc[make_pair(aux1.second, st1[i] - 'a' + 2)]);
			}
			aux2 = make_pair(st1[n - i - 1] - 'a' + 2, marc[aux2]);
			
			if(marc[aux1] == 0) marc[aux1] = ++cnt;
			if(marc[aux2] == 0) marc[aux2] = ++cnt;
			
			if(marc[aux1] == marc[aux2]) {
				ans += 2;
				aux1 = make_pair(0, 0);
				aux2 = make_pair(0, 0);
			}
		}
		if(n % 2 == 1) ans++;
		else if(aux1.first != 0) ans++;
		printf("%d\n", ans);
	}
}

Compilation message (stderr)

palindromic.cpp: In function 'int main()':
palindromic.cpp:15:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   15 |  scanf("%d", &t);
      |  ~~~~~^~~~~~~~~~

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