giúp mik với plsss. cảm ơn

#include <bits/stdc++.h>
#define ll long long
#define faster ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define name "delete"
using namespace std;
const int nmax = 307;
int t, n, dp[nmax][nmax];
string s;

int solve(int l, int r)
{
    if (l >= r) return 1;
    if (dp[l][r] != -1) return dp[l][r];

    int res = (s[l] == s[r]) ? solve(l+1, r-1) : nmax;
    for(int k = l; k < r; ++k)
        res = min(res, solve(l, k) + solve(k+1, r));
    return dp[l][r] = res;
}

int main()
{
    faster;
    freopen(name".inp", "r", stdin);
    freopen(name".out", "w", stdout);
    cin >> t;
    while (t--)
    {
        cin >> s;
        n = s.size();
        for(int i = 0; i < n; ++i)
            for(int j = 0; j < n; ++j) dp[i][j] = -1;
        cout << solve(0, n-1) << '\n';
    }
    return 0;
}
Đây nha bạn code AC 100%