Submission #1357717

#	Time	Username	Problem	Language	Result	Execution time	Memory
1357717		coin_	Safety (NOI18_safety)	C++20	7 / 100	2095 ms	327680 KiB

safety

#include <bits/stdc++.h>
#define int long long
using namespace std;
const int inf = 1e18;

signed main(){
    int n, h;
    cin >> n >> h;
    int maxH = 5005;
    vector<vector<int>> dp(n+5, vector<int>(maxH, inf));
    vector<int> a(n);
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int hi = 0; hi < maxH; hi++){
        dp[0][hi] = abs(a[0] - hi);
    }
    h = min(h, maxH);
    for (int i = 1; i < n; i++){
        for (int hi = 0; hi < maxH; hi++){
            int gain = inf;
            for (int j = max(0LL, hi - h); j <= min(hi + h, maxH-1); j++){
                gain = min(dp[i-1][j], gain);
            }
            dp[i][hi] = min(dp[i][hi], abs(a[i] - hi) + gain);
        }
    }
    int ans = inf;
    for (int i = 0; i < maxH; i++){
        ans = min(ans, dp[n-1][i]);
    }
    cout << ans;
}

• Subtask 1: 3 / 3
• Subtask 2: 4 / 4
• Subtask 3: 0 / 9
• Subtask 4: 0 / 5
• Subtask 5: 0 / 6
• Subtask 6: 0 / 11
• Subtask 7: 0 / 11
• Subtask 8: 0 / 22
• Subtask 9: 0 / 29