Palindrome

#include <iostream>
using namespace std;

int dp[2020][2020];

const int INF=100000;

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	string s;
	cin>>s;
	int n=s.size();
	for (int i=1;i<=n;i++) {
		dp[0][i]=i;
		dp[i][0]=i;
	}
	for (int i=1;i<=n;i++) {
		for (int j=1;j<=n;j++) {
			dp[i][j]=INF;
			dp[i][j]=min(dp[i][j],dp[i-1][j]+1);
			dp[i][j]=min(dp[i][j],dp[i][j-1]+1);
			if (s[i-1]==s[n-j]) dp[i][j]=min(dp[i][j],dp[i-1][j-1]);
			else dp[i][j]=min(dp[i][j],dp[i-1][j-1]+1);
		}
	}
	int parsa=INF;
	for (int i=0;i<n;i++) {
		parsa=min(parsa,dp[i][n-i]);
		parsa=min(parsa,dp[i][n-i-1]);
	}
	cout<<parsa<<"\n";
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED

Test 20

Verdict: ACCEPTED

Test 21

Verdict: ACCEPTED

Test 22

Verdict: ACCEPTED

Test 23

Verdict: ACCEPTED

Test 24

Verdict: ACCEPTED

Test 25

Verdict: ACCEPTED

Test 26

Verdict: ACCEPTED

Test 27

Verdict: ACCEPTED

Test 28

Verdict: ACCEPTED

Test 29

Verdict: ACCEPTED

Test 30

Verdict: ACCEPTED