Submission #917137

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
917137	2024-01-27 09:47:08	allvik	Sparklers (JOI17_sparklers)	C++17	50 / 100	2259 ms	262144 KiB

sparklers

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#include <iostream>
#include <vector>
using namespace std;
#define int long long
const int MAXN = 5000;
int dp[MAXN][MAXN];
int t;
bool check(int n, int k, vector <int>& a, int s) {
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < n; ++j) {
            dp[i][j] = 0;
        }
    }
    dp[k][k] = 1;
    for (int len = 1; len <= n; ++len) {
        for (int l = 0; l + len - 1 < n; ++l) {
            int r = l + len - 1;
            if (dp[l][r] == 0) continue;
            if (r < n - 1 && (a[r + 1] - a[l] + 2 * s - 1) / (2 * s) <= (r - l + 1) * t) dp[l][r + 1] = 1;
            if (l && (a[r] - a[l - 1] + 2 * s - 1) / (2 * s) <= (r - l + 1) * t) dp[l - 1][r] = 1;
        }
    }
    return dp[0][n - 1];
}
signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
 
 
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• Subtask 1: 30 / 30
• Subtask 2: 20 / 20
• Subtask 3: 0 / 50