Submission #1293429

#	Time	Username	Problem	Language	Result	Execution time	Memory
1293429		ducdev	Candies (JOI18_candies)	C++17	8 / 100	131 ms	32956 KiB

candies

// Author: 4uckd3v - Nguyen Cao Duc
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

const int MAX_N = 2e5;
const int MOD = 1e9 + 7;
const ll INF = 1e18;

int n;
int a[MAX_N + 5];

namespace SUBTASK_1 {
    const int N = 2000;

    ll dp[N + 5][N + 5];

    void Solve() {
        for (int i = 0; i <= n; i++)
            for (int j = 0; j <= n; j++) dp[i][j] = -INF;

        for (int i = 0; i <= n; i++) dp[0][i] = 0;
        for (int i = 1; i <= (n + 1) >> 1; i++) {
            for (int j = i; j <= n; j++) {
                dp[i][j] = dp[i][j - 1];
                if (j == 1) dp[i][j] = a[1];
                if (j >= 2) dp[i][j] = max(dp[i][j], dp[i - 1][j - 2] + a[j]);
            };
            cout << dp[i][n] << '\n';
        };
    };
};  // namespace SUBTASK_1

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    if (fopen("MAIN.INP", "r")) {
        freopen("MAIN.INP", "r", stdin);
        freopen("MAIN.OUT", "w", stdout);
    };

    cin >> n;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    };

    SUBTASK_1::Solve();
};

Compilation message (stderr)

candies.cpp: In function 'int main()':
candies.cpp:39:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |         freopen("MAIN.INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
candies.cpp:40:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |         freopen("MAIN.OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 0 / 92