Submission #778302

#	Time	Username	Problem	Language	Result	Execution time	Memory
778302		vjudge1	Roller Coaster Railroad (IOI16_railroad)	C++17	34 / 100	36 ms	9044 KiB

railroad

#include "railroad.h"
#include <bits/stdc++.h>
using namespace std;
#define sp " "
#define endl "\n"
#define pb push_back
#define pii pair<int, int>
#define st first
#define nd second
#define N 17
#define ll long long

ll dp[(1<<N)][N];
const ll INF = 2e18 + 7;

long long plan_roller_coaster(vector<int> s, vector<int> t) {
    int n = (int) s.size();
    if (n >= N) return 0;
    for (int i = 0; i < n; i++)
        dp[(1<<n) - 1][i] = 0;

    for (int i = (1<<n) - 2; i > 0; i--){
        for (int j = 0; j < n; j++){
            if (i & (1<<j)){
                dp[i][j] = INF;
                for (int k = 0; k < n; k++){
                    if (i & (1<<k)) continue;
                    dp[i][j] = min(dp[i][j], dp[i | (1<<k)][k] + max((int)0, t[j] - s[k]));
                }
            }
        }
    }

    ll ans = INF;
    for (int i = 0; i < n; i++) ans = min(ans, dp[(1<<i)][i]);
    return ans;
}

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