oj.uz

답안 #1024562

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1024562 2024-07-16T07:46:01 Z stdfloat Palinilap (COI16_palinilap) C++17
17 / 100
 1000 ms 600 KB 
#include <bits/stdc++.h>
using namespace std;

using ll = long long;

int main() {
    ios::sync_with_stdio(false); cin.tie(nullptr);

    string s;
    cin >> s;

    int n = (int)s.size();

    int cnt = 0;
    for (int i = 0; i < n; i++) {
        for (int j = i; j < n; j++) {
            string t = s.substr(i, j - i + 1), p = t;
            reverse(p.begin(), p.end());

            cnt += (p == t);
        }
    }

    int mx = cnt;
    for (int i = 0; i < n; i++) {
        int rmv = 0;
        for (int j = 0; j <= i; j++) {
            for (int k = i; k < n; k++) {
                string t = s.substr(j, k - j + 1), p = t;
                reverse(p.begin(), p.end());

                rmv += (t == p);
            }
        }

        for (char c = 'a'; c <= 'z'; c++) {
            if (s[i] == c) continue;

            int remsi = s[i];
            s[i] = c;

            int cnt2 = cnt - rmv;
            for (int j = 0; j <= i; j++) {
                for (int k = i; k < n; k++) {
                    string t = s.substr(j, k - j + 1), p = t;
                    reverse(p.begin(), p.end());

                    cnt2 += (t == p);
                }
            }

            s[i] = remsi;
            
            mx = max(mx, cnt2);
        }
    }

    cout << mx;
}

Subtask #1
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 152 ms 428 KB Output is correct
2 Correct 305 ms 344 KB Output is correct
3 Correct 309 ms 348 KB Output is correct
4 Correct 309 ms 344 KB Output is correct
5 Correct 313 ms 344 KB Output is correct

Subtask #2
0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1052 ms 348 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 46.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1033 ms 600 KB Time limit exceeded
2 Halted 0 ms 0 KB -