Submission #851088

#	Time	Username	Problem	Language	Result	Execution time	Memory
851088		overwatch9	Rabbit Carrot (LMIO19_triusis)	C++17	35 / 100	106 ms	600 KiB

triusis

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
const int maxa = 5000 + 1;
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, m;
    cin >> n >> m;
    vector <int> nums(n+1);
    for (int i = 1; i <= n; i++) {
        cin >> nums[i];
    }
    if (m == 0) {
        int ans = 0;
        for (int i = 1; i <= n; i++) {
            if (nums[i] != 0)
                ans++;
        }
        cout << ans << '\n';
        return 0;
    }
    int prev = 0, curr = 1;
    vector <vector <int>> dp(2, vector <int> (maxa));
    vector <vector <int>> mn_vals(2, vector <int> (maxa));
    bool flag = false;
    for (int i = maxa-1; i >= 0; i--) {
        if (flag || (i <= m && i == nums[1])) {
            dp[1][i] = 0;
            mn_vals[1][i] = 0;
            flag = true;
        } else if (i <= m) {
            mn_vals[1][i] = 1;
            dp[1][i] = 1;
        } else {
            mn_vals[1][i] = 1e9;
            dp[1][i] = 1e9;
        }
    }
    swap(prev, curr);
    for (int i = 2; i <= n; i++) {
        for (int j = 0; j < maxa; j++) {
            int a = mn_vals[prev][max(0, j - m)];
            dp[curr][j] = a;
            if (nums[i] != j) {
                dp[curr][j]++;
            }
        }
        for (int j = maxa-1; j >= 0; j--) {
            mn_vals[curr][j] = dp[curr][j];
            if (j+1 < maxa)
                mn_vals[curr][j] = min(mn_vals[curr][j+1], mn_vals[curr][j]);
        }
        swap(prev, curr);
    }
    int ans = 1e9;
    for (int i = 0; i < maxa; i++)
        ans = min(ans, dp[prev][i]);
    cout << ans << '\n';
}

• Subtask 1: 14 / 14
• Subtask 2: 21 / 21
• Subtask 3: 0 / 28
• Subtask 4: 0 / 37