oj.uz

답안 #258694

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
258694 2020-08-06T11:39:56 Z fedoseevtimofey Pinball (JOI14_pinball) C++14
0 / 100
 0 ms 384 KB 
#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;

struct SegmentTree {
  int n;
  vector <ll> t;
  void modify(int id, ll val, int l, int r, int v) {
    if (l == r) {
      t[v] = min(t[v], val);
    } else {
      int m = (l + r) >> 1;
      if (id <= m) modify(id, val, l, m, 2 * v + 1);
      else modify(id, val, m + 1, r, 2 * v + 2);
      t[v] = min(t[2 * v + 1], t[2 * v + 2]);
    }
  }
  ll get(int ql, int qr, int l, int r, int v) {
    if (qr < l || r < ql) return Inf;
    if (ql <= l && r <= qr) return t[v];
    int m = (l + r) >> 1;
    return min(get(ql, qr, l, m, 2 * v + 1), get(ql, qr, m + 1, r, 2 * v + 2));
  }
  SegmentTree(int nn) {
    n = nn;
    t.resize(4 * n, Inf);
  }
};  

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 <int> cmp;
    for (int i = 0; i < n; ++i) {
      cmp.push_back(a[i]);
      cmp.push_back(b[i]);
      cmp.push_back(c[i]);
    }
    sort(cmp.begin(), cmp.end());
    cmp.resize(unique(cmp.begin(), cmp.end()) - cmp.begin());
    int m = cmp.size();
    auto go = [&] (int &x) {
      x = lower_bound(cmp.begin(), cmp.end(), x) - cmp.begin() + 1;
    };  
    for (int i = 0; i < n; ++i) {
      go(a[i]);
      go(b[i]);
      go(c[i]);
    }
  }
  vector <ll> dpL(n, Inf), dpR(n, Inf);
  SegmentTree trL(m + 1), trR(m + 1);
  ll ans = Inf;

  for (int i = 0; i < n; ++i) {
    ll costL = trL.get(a[i], b[i], 0, m, 0), costR = trR.get(a[i], b[i], 0, m, 0);
    if (a[i] == 1) costL = 0;
    if (b[i] == m) costR = 0;
    ans = min(ans, costL + costR + d[i]);

    if (a[i] == 1) {
      dpL[i] = d[i];
    } else {
      dpL[i] = min(dpL[i], d[i] + trL.get(a[i], b[i], 0, m, 0));
    }
    if (b[i] == m) {
      dpR[i] = d[i];
    } else {
      dpR[i] = min(dpR[i], d[i] + trR.get(a[i], b[i], 0, m, 0));
    }
    //cout << c[i] << ' ' << dpL[i] << ' ' << dpR[i] << endl;
    trL.modify(c[i], dpL[i], 0, m, 0);
    trR.modify(c[i], dpR[i], 0, m, 0);
  }

  if (ans != Inf) cout << ans << '\n';
  else cout << "-1\n";
}

Compilation message

pinball.cpp: In function 'int main()':
pinball.cpp:71:9: warning: unused variable 'm' [-Wunused-variable]
     int m = cmp.size();
         ^

Subtask #1
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 49.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 384 KB Output isn't correct
2 Halted 0 ms 0 KB -