Submission #863528

#	Time	Username	Problem	Language	Result	Execution time	Memory
863528		SyedShajib	Split the sequence (APIO14_sequence)	C++17	0 / 100	2095 ms	13400 KiB

sequence

#include <iostream>
#include <vector>
#include <algorithm>

int main() {
    int n, k;
    std::cin >> n >> k;

    std::vector<int> a(n);
    for (int i = 0; i < n; ++i) {
        std::cin >> a[i];
    }

    std::vector<std::vector<long long>> dp(n + 1, std::vector<long long>(k + 1, -1));
    std::vector<std::vector<int>> pos(n + 1, std::vector<int>(k + 1, -1));

    dp[0][0] = 0;
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j <= k; ++j) {
            if (dp[i][j] != -1) {
                long long sum = 0;
                for (int l = i; l < n; ++l) {
                    sum += a[l];
                    if (j + 1 <= k && dp[l + 1][j + 1] < dp[i][j] + sum * (l - i + 1)) {
                        dp[l + 1][j + 1] = dp[i][j] + sum * (l - i + 1);
                        pos[l + 1][j + 1] = i;
                    }
                }
            }
        }
    }

    std::cout << dp[n][k] << std::endl;

    int cur = n, curk = k;
    std::vector<int> splits;
    while (cur > 0) {
        splits.push_back(pos[cur][curk]);
        cur = pos[cur][curk];
        --curk;
    }

    std::reverse(splits.begin(), splits.end());
    for (int i = 0; i < splits.size() - 1; ++i) {
        std::cout << splits[i] << ' ';
    }

    return 0;
}

Compilation message (stderr)

sequence.cpp: In function 'int main()':
sequence.cpp:44:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |     for (int i = 0; i < splits.size() - 1; ++i) {
      |                     ~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 11
• Subtask 3: 0 / 11
• Subtask 4: 0 / 17
• Subtask 5: 0 / 21
• Subtask 6: 0 / 29