Submission #35766

#	Time	Username	Problem	Language	Result	Execution time	Memory
35766		funcsr	Money (IZhO17_money)	C++14	45 / 100	1500 ms	56852 KiB

money

#include <cstdio>
#include <iostream>
#include <algorithm>
#include <string>
#include <cstring>
#include <vector>
#include <queue>
#include <set>
#include <map>
#include <cmath>
#include <iomanip>
#include <cassert>
#include <bitset>
using namespace std;

typedef pair<int, int> P;
#define rep(i, n) for (int i=0; i<(n); i++)
#define all(c) (c).begin(), (c).end()
#define uniq(c) c.erase(unique(all(c)), (c).end())
#define index(xs, x) (int)(lower_bound(all(xs), x) - xs.begin())
#define _1 first
#define _2 second
#define pb push_back
#define INF 1145141919
#define MOD 1000000007

int N;
int A[1000000];
int L[1000000];

signed main() {
  ios::sync_with_stdio(false); cin.tie(0);
  cin >> N;
  rep(i, N) cin >> A[i];
  L[N-1] = N-1;
  for (int i=N-2; i>=0; i--) {
    if (A[i] <= A[i+1]) L[i] = L[i+1];
    else L[i] = i;
  }

  set<int> vs;
  vs.insert(1000001);
  rep(i, N) {
    int lim = *vs.upper_bound(A[i]);
    L[i] = upper_bound(A+i, A+L[i]+1, lim) - A - 1;
    vs.insert(A[i]);
  }
  //rep(i, N) cout << L[i] << ",";cout<<"\n";
  assert(is_sorted(L, L+N));
  int lo = 0, ctr = 0;
  while (lo < N) {
    lo = L[lo]+1;
    ctr++;
  }
  cout << ctr << "\n";
  return 0;
}

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 20 / 20
• Subtask 4: 0 / 55