Submission #492616

#	Time	Username	Problem	Language	Result	Execution time	Memory
492616		dxz05	Roller Coaster Railroad (IOI16_railroad)	C++14	34 / 100	52 ms	13876 KiB

railroad

#include "railroad.h"
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

long long plan_roller_coaster(vector<int> s, vector<int> t) {
    int n = (int) s.size();

    vector<vector<ll>> dp(1 << n, vector<ll>(n, 1e18));

    for (int i = 0; i < n; i++) dp[1 << i][i] = 0;

    for (int mask = 0; mask < (1 << n); mask++){
        for (int i = 0; i < n; i++){
            if (!(mask & (1 << i))) continue;
            for (int j = 0; j < n; j++){
                if (!(mask & (1 << j))) continue;
                dp[mask][i] = min(dp[mask][i], dp[mask ^ (1 << i)][j] + max(0, t[j] - s[i]));
            }
        }
    }

    ll res = 1e18;
    for (int i = 0; i < n; i++) res = min(res, dp[(1 << n) - 1][i]);

    return res;
}

• Subtask 1: 11 / 11
• Subtask 2: 23 / 23
• Subtask 3: 0 / 30
• Subtask 4: 0 / 36