Submission #258689

#	Time	Username	Problem	Language	Result	Execution time	Memory
258689		fedoseevtimofey	Pinball (JOI14_pinball)	C++14	51 / 100	1066 ms	2048 KiB

pinball

#include <iostream>
#include <string>
#include <vector>
#include <queue>
#include <deque>
#include <stack>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <cstring>
#include <cmath>
#include <cstdlib>
#include <algorithm>
#include <random>
#include <iomanip>
#include <functional>
#include <cassert>

using namespace std;

typedef long long ll;

const ll Inf = 1e18;

int main() {
  ios_base::sync_with_stdio(false); cin.tie(0);
#ifdef LOCAL
  freopen("input.txt", "r", stdin);
#endif
  int n, m;
  cin >> n >> m;
  vector <int> a(n), b(n), c(n), d(n);
  for (int i = 0; i < n; ++i) {
    cin >> a[i] >> b[i] >> c[i] >> d[i];
  }
  vector <ll> dpL(n, Inf), dpR(n, Inf);
  for (int i = 0; i < n; ++i) {
    if (a[i] == 1) {
      dpL[i] = d[i];
    }
    for (int j = i - 1; j >= 0; --j) {
      if (a[i] <= c[j] && c[j] <= b[i]) {
        dpL[i] = min(dpL[i], dpL[j] + d[i]);
      }
    }
  }
  for (int i = 0; i < n; ++i) {
    if (b[i] == m) {
      dpR[i] = d[i];
    }
    for (int j = i - 1; j >= 0; --j) {
      if (a[i] <= c[j] && c[j] <= b[i]) {
        dpR[i] = min(dpR[i], dpR[j] + d[i]);
      }
    }
  }
  
  ll ans = Inf;
  for (int i = 0; i < n; ++i) {
    ll costL = Inf, costR = Inf;
    for (int j = i - 1; j >= 0; --j) {
      if (a[i] <= c[j] && c[j] <= b[i]) {
        costL = min(costL, dpL[j]);
        costR = min(costR, dpR[j]);
      }
    }
    if (a[i] == 1) costL = 0;
    if (b[i] == m) costR = 0;
    ans = min(ans, costL + costR + d[i]);
  }   
  if (ans != Inf) cout << ans << '\n';
  else cout << "-1\n";
} 

• Subtask 1: 11 / 11
• Subtask 2: 18 / 18
• Subtask 3: 22 / 22
• Subtask 4: 0 / 49