Submission #550934

#	Time	Username	Problem	Language	Result	Execution time	Memory
550934		colossal_pepe	Skyline (IZhO11_skyline)	C++17	100 / 100	179 ms	56128 KiB

skyline

#include <iostream>
#include <cstring>
using namespace std;
 
/*
dp[i][carry][carry, pass forward] = min cost for range [i...n]
*/
 
const int INF = 1e9;
 
int n, h[305], dp[305][205][205];
 
int brutus(int i, int j, int k) {
    if (i > n + 1) return 0;
    if (dp[i][j][k] != -1) return dp[i][j][k];
    if (j == 0) dp[i][j][k] = brutus(i + 1, k, h[i + 1]);
    else {
        dp[i][j][k] = brutus(i, j - 1, k) + 3;
        if (min(j, k) > 0) dp[i][j][k] = min(dp[i][j][k], brutus(i, j - 1, k - 1) + 5);
        if (j <= k and j <= h[i + 1]) dp[i][j][k] = min(dp[i][j][k], brutus(i + 1, k - j, h[i + 1] - j) + 7 * j);
    }
    return dp[i][j][k];
}
 
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    memset(dp, -1, sizeof(dp));
    cin >> n;
    for (int i = 1; i <= n; i++) {
        cin >> h[i];
    }
    h[0] = 0, h[n + 1] = 0;
    cout << brutus(1, h[0], h[1]) << '\n';
    return 0;
}

• Subtask 1: 100 / 100