Submission #168933

#	Time	Username	Problem	Language	Result	Execution time	Memory
168933		beso123	Money (IZhO17_money)	C++14	45 / 100	1570 ms	60664 KiB

money

#include <bits/stdc++.h>
#define int long long
#define N 1000006
using namespace std;
int n,a[N],fen[N],cnt;
set <int> st;
void UPD(int x,int val){
    while(x<=N){
        fen[x]+=val;
        x=x+(x&(-x));
    }
}
int GET(int x){
    int sum=0;
    while(x>=1){
        sum+=fen[x];
        x=x-(x&(-x));
    }
    return sum;
}
int get(int l,int r){
    if(l>r)
        return 0;
    return GET(r)-GET(l-1);
}
main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a[i];
	}
	int l=1;
	for(int r=1;r<=n+1;r++){
		if(a[r-1]>a[r]){
			cnt++;
			for(int j=l;j<=r-1;j++)
				st.insert(a[j]);
                l=r;
			continue;
		}
		auto it=st.upper_bound(a[l]);
		if(it!=st.end() && *it<a[r]){
			++cnt;
			for(int j=l;j<=r-1;j++)
				st.insert(a[j]);
                l=r;
		}
	}
	cout<<cnt;
return 0;
}

Compilation message (stderr)

money.cpp:26:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

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