Submission #702165

#	Time	Username	Problem	Language	Result	Execution time	Memory
702165		mychecksedad	Money (IZhO17_money)	C++17	0 / 100	1577 ms	212 KiB

money

/* Author : Mychecksdead */
#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define PI 3.1415926535
#define pb push_back
#define all(x) x.begin(), x.end()
const int N = 1e6+100, M = 1e5+10, K = 20;


int n, a[N], ans;
set<int> s;
void solve(){
  cin >> n;
  for(int i = 0; i < n; ++i) cin >> a[i];
  for(int i = 0; i < n; ++i) s.insert(i + 1);
  ans = 0;
  for(int i = n - 1; i >= 0; --i){
    auto it = s.find(a[i]);
    ans++;
    vector<int> er;
    while(*it == a[i]){
      er.pb(*it);
      --i;
      if(it == s.begin())
        break;
      --it;
    }
    for(int u: er) s.erase(u);
    ++i;
  }
  cout << ans;
}


int main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int T = 1, aa;
  // cin >> T;aa=T;
  while(T--){
    // cout << "Case #" << aa-T << ": ";
    solve();
    cout << '\n';
  }
  return 0;
 
}

Compilation message (stderr)

money.cpp: In function 'int main()':
money.cpp:40:14: warning: unused variable 'aa' [-Wunused-variable]
   40 |   int T = 1, aa;
      |              ^~

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