Submission #902214

#	Time	Username	Problem	Language	Result	Execution time	Memory
902214		nguyentunglam	Roller Coaster Railroad (IOI16_railroad)	C++17	11 / 100	2071 ms	8132 KiB

railroad

#include<bits/stdc++.h>
#define fi first
#define se second
#define endl "\n"
#define ii pair<int, int>
using namespace std;

long long plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
  int n = (int) s.size();

  vector<int> order(n);

  for(int i = 0; i < n; i++) order[i] = i;

  auto check = [&] () {
    long long ret = 0;
    for(long long cur = 0, speed = 1; cur < n; cur++) {
      int i = order[cur];
      ret += max(0LL, speed - s[i]);
      speed = t[i];
    }
    return ret;
  };

  long long ans = 1e18;

  do {
    ans = min(ans, check());
  } while (next_permutation(order.begin(), order.begin() + n));

  return ans;
}


#ifdef ngu
int main() {

  freopen ("task.inp", "r", stdin);
  freopen ("task.out", "w", stdout);

  int n; cin >> n;
  vector<int> s(n), t(n);
  for(int i = 0; i < n; i++) cin >> s[i] >> t[i];


  cout << plan_roller_coaster(s, t);
}
#endif // ngu

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