Submission #784939

#	Time	Username	Problem	Language	Result	Execution time	Memory
784939		GusterGoose27	Roller Coaster Railroad (IOI16_railroad)	C++17	34 / 100	37 ms	7728 KiB

railroad

#include "railroad.h"

#include <bits/stdc++.h>

using namespace std;

typedef pair<int, int> pii;
typedef long long ll;

const int MAXN = 16;
const int MAXM = 1e9+5;
const ll inf = (ll)MAXN*MAXM;
int nxt[MAXN];
ll dp[MAXN+1][1<<MAXN]; // thing that just happened
int n;

ll plan_roller_coaster(vector<int> s, vector<int> t) {
    t.push_back(1);
    n = s.size();
    for (int i = 0; i < n; i++) {
        dp[i][0] = 0;
    }
    for (int mask = 1; mask < (1<<n); mask++) {
        for (int prev = 0; prev <= n; prev++) {
            if ((1<<prev)&mask) continue;
            // if (prev == n && mask < (1<<n)-1) continue;
            dp[prev][mask] = inf;
            for (int nxt = 0; nxt < n; nxt++) {
                if (((1<<nxt)&mask) == 0) continue;
                dp[prev][mask] = min(dp[prev][mask], dp[nxt][mask^(1<<nxt)]+max(0, t[prev]-s[nxt]));
            }
        }
    }
    return dp[n][(1<<n)-1];
}

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