Submission #1020722

#	Time	Username	Problem	Language	Result	Execution time	Memory
1020722		mansur	Roller Coaster Railroad (IOI16_railroad)	C++17	34 / 100	359 ms	524288 KiB

railroad

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

using namespace std;

#define rall(s) s.rbegin(), s.rend()
#define all(s) s.begin(), s.end()
#define sz(s) (int)s.size()
#define s second 
#define f first 

using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const ll inf = 1e18;

long long plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
    int n = sz(s);
    if (n <= 16) {
        ll dp[1 << n][n];
        for (int msk = 0; msk < (1 << n); msk++) {
            for (int i = 0; i < n; i++) {
                dp[msk][i] = inf;
            }
        }
        for (int i = 0; i < n; i++) dp[1 << i][i] = 0;
        for (int msk = 1; msk < (1 << n); msk++) {
            for (int i = 0; i < n; i++) {
                if (msk >> i & 1) {
                    for (int j = 0; j < n; j++) {
                        if (msk >> j & 1) continue;
                        int msk1 = msk + (1 << j);
                        dp[msk1][j] = min(dp[msk1][j], dp[msk][i] + max(0, t[i] - s[j]));
                    }
                }
            }
        }
        ll ans = inf;
        for (int i = 0; i < n; i++) ans = min(ans, dp[(1 << n) - 1][i]);
        return ans;
    }
}

Compilation message (stderr)

railroad.cpp: In function 'long long int plan_roller_coaster(std::vector<int>, std::vector<int>)':
railroad.cpp:43:1: warning: control reaches end of non-void function [-Wreturn-type]
   43 | }
      | ^

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