제출 #391932

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
391932		SoGood	Money (IZhO17_money)	C++17	100 / 100	1239 ms	57980 KiB

money

//#pragma GCC optimize ("Ofast")
//#pragma GCC optimize ("unroll-loops")
//#pragma GCC target("avx,avx2,fma")

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
#define pb push_back
#define F first
#define S second
#define ins insert
#define mp make_pair
#define fo(i, n1, n, x) for(int i = n1; i <= n; i += x)
#define foo(i, n, n1, x) for(int i = n; i >= n1; i -= x)
#define bit __builtin_popcount
#define md (l + ((r - l) / 2))
#define all(x) x.begin(),x.end()
#define eb emplace_back
#define ub upper_bound
#define lb lower_bound
#define ios ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)

using namespace std;
//using namespace __gnu_pbds;
//using namespace __gnu_cxx;


using ll = long long;

//#define int ll

using pii = pair<int,int>;
using pll = pair<ll,ll>;
using vi = vector<int>;



const int N = 1e6 + 11, mod = 1e9 + 7, mod2 = 998244353;
const int MAX = 1e5 + 11;
const int INF1 = 2e9 + 11;
const ll INF2 = 6e18 + 11;
const double INF3 = 1e8 + 11;
const int base = 500;
const int P = 31;
const int dx[] = {1, -1, 0, 0, 1, 1, -1, -1};
const int dy[] = {0, 0, 1, -1, 1, -1, 1, -1};
const double EPS = 1e-4;
const double PI = acos(-1.0);


//template<typename T> using ordered_set = tree <T, null_type, less <T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T1, typename T2> inline void chmin(T1 &a, T2 b) { if (a > b) a = b; }
template<typename T1, typename T2> inline void chmax(T1 &a, T2 b) { if (a < b) a = b; }


mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int rnd(int l, int r) { return uniform_int_distribution<int> (l, r)(rng); }

int n, a[N];
main() {
  file("paint");
  ios;
  cin >> n;
  fo(i, 1, n, 1) cin >> a[i];
  int ans = 0;
  set <int> st;
  st.ins(0);
  st.ins(INF1);
  fo(i, 1, n, 1) {
    auto it = st.ub(a[i]);
    int j = i;
    ++ans;
    while (i + 1 <= n and a[i + 1] >= a[i] and a[i + 1] <= *it) ++i;
//    cerr << "CH " << j << " " << i << " " << *it << "\n";
    while (j <= i) st.ins(a[j++]);
  }
  cout << ans;
  return 0;
}
/**
6
3 6 4 5 1 2


*/

컴파일 시 표준 에러 (stderr) 메시지

money.cpp:62:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   62 | main() {
      |      ^
money.cpp: In function 'int main()':
money.cpp:23:48: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   23 | #define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
      |                                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
money.cpp:63:3: note: in expansion of macro 'file'
   63 |   file("paint");
      |   ^~~~
money.cpp:23:77: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   23 | #define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
      |                                                                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
money.cpp:63:3: note: in expansion of macro 'file'
   63 |   file("paint");
      |   ^~~~

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