Submission #595043

#	Time	Username	Problem	Language	Result	Execution time	Memory
595043		Lucpp	Roller Coaster Railroad (IOI16_railroad)	C++17	34 / 100	53 ms	14004 KiB

railroad

#include "railroad.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll INF = 1e18;

ll plan_roller_coaster(vector<int> s, vector<int> t) {
    int n = (int)s.size();
    vector<vector<ll>> dp(1<<n, vector<ll>(n));
    for(int msk=1; msk < (1<<n); msk++){
        if(__builtin_popcount(msk) == 1) continue;
        for(int i = 0; i < n; i++){
            if(!(msk & (1<<i))) continue;
            dp[msk][i] = INF;
            int m = msk^(1<<i);
            for(int j = 0; j < n; j++){
                if(!(m & (1<<j))) continue;
                dp[msk][i] = min(dp[msk][i], dp[m][j] + max(0, t[j]-s[i]));
            }
        }
    }
    ll ans = INF;
    for(int i = 0; i < n; i++) ans = min(ans, dp[(1<<n)-1][i]);
    return ans;
}

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