Submission #1136312

#	Time	Username	Problem	Language	Result	Execution time	Memory
1136312		alterio	Roller Coaster Railroad (IOI16_railroad)	C++20	34 / 100	59 ms	13380 KiB

railroad

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

using namespace std;

#define ll long long

const int mxn = 16;

int n;
vector<int> s, t;
ll dp[mxn][1 << mxn];

ll solve(int last, int mask) {
    if (mask == (1 << n) - 1) return 0;
    if (dp[last][mask] != -1) return dp[last][mask];
    ll ans = 1e15;
    for (int i = 0; i < n; i++) {
        if ((1 << i) & mask) continue;
        ans = min(ans, max(0, t[last] - s[i]) + solve(i, mask | (1 << i)));
    }
    return dp[last][mask] = ans;
}

ll plan_roller_coaster(vector<int> _s, vector<int> _t) {
    s = _s;
    t = _t;
    n = s.size();
    memset(dp, -1, sizeof(dp));
    ll ans = 1e15;
    for (int i = 0; i < n; i++) ans = min(ans, solve(i, (1 << i)));
    return ans;
}

Compilation message (stderr)

railroad.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
railroad_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~

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