Submission #671613

#	Time	Username	Problem	Language	Result	Execution time	Memory
671613		Baytoro	Money (IZhO17_money)	C++17	100 / 100	956 ms	55252 KiB

money

#include <bits/stdc++.h>
using namespace std;
#define ios ios::sync_with_stdio(false); cin.tie(NULL);
#define pb push_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define fr first
#define sc second
#define int long long
#define endl '\n'
void fopn(string name){
	freopen((name+".in").c_str(),"r",stdin);
	freopen((name+".out").c_str(),"w",stdout);
}
const int INF=1e9+9,mod=1e9+7;
int n,m;
void solve(){
	cin>>n;
	vector<int> vec(n);
	for(int i=0;i<n;i++)
		cin>>vec[i];
	set<int> st;
	auto it=st.end();
	int res=0;
	int last=-1;
	for(int i=0;i<n;i++){
		auto it2=st.lower_bound(vec[i]);
		auto it3=st.upper_bound(vec[i]);
		if(vec[i]<last || (it2!=it && it3!=it)){
			res++;
			it=it3;
		}
		st.insert(vec[i]);
		last=vec[i];
	}
	cout<<res+1<<endl;
}
main(){
	ios;
	int T=1;
	//cin>>T;
	while(T--){
		solve();
	}
}

Compilation message (stderr)

money.cpp:38:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   38 | main(){
      | ^~~~
money.cpp: In function 'void fopn(std::string)':
money.cpp:12:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
money.cpp:13:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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