Submission #298070

#	Time	Username	Problem	Language	Result	Execution time	Memory
298070		kevlee	Roller Coaster Railroad (IOI16_railroad)	C++17	34 / 100	85 ms	8696 KiB

railroad

#include "railroad.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mod 1000000007
#define h1 7897897897897897
#define h2 7897466719774591
#define b1 98762051
#define b2 98765431
#define inf 1000000000
#define pi 3.1415926535897932384626
#define LMAX 9223372036854775807
#define ll long long
#define fi first
#define se second
#define pii pair<int, int>
#define pll pair<ll, ll>
#define vi vector<int>
#define vl vector<ll>
#define vp vector<pii>
#define SET(a, b) memset(a, b, sizeof(a))
#define all(x) (x).begin(), (x).end()
#define FOR(i, a, b) for (int i = (a); i <= (b); i++)
#define FORD(i, a, b) for (int i = (a); i >= (b); i--)
ll dp[1 << 16][16];
long long plan_roller_coaster(vector<int> s, vector<int> t) {
  int n = s.size();
  if (n > 16) return 0;
  FOR(mask, 1, (1 << n) - 1) {
    if (__builtin_popcount(mask) == 1) continue;
    //cout << mask << ":\n";
    FOR(i, 0, n - 1) {
      if ((1 << i) & mask) {
        dp[mask][i] = LLONG_MAX;
        FOR(j, 0, n - 1) {
          if (i != j && ((1 << j) & mask)) {
            //cout << "i = " << i << "; j = " << j << "; " << t[j] << ' ' << s[i] << endl;
            dp[mask][i] = min(dp[mask][i], dp[mask ^ (1 << i)][j] + max(0, t[j] - s[i]));
          }
        }
      }
    }
    
    //FOR(i, 0, n-1) cout << dp[mask][i] << ' ';
    //cout << endl;
  }
  ll ans = LLONG_MAX;
  FOR(i, 0, n - 1) 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