Submission #168870

#	Time	Username	Problem	Language	Result	Execution time	Memory
168870		beso123	Money (IZhO17_money)	C++14	0 / 100	2 ms	376 KiB

money

#include <bits/stdc++.h>
#define int long long
#define N 1000006
using namespace std;
int n,a[N],fen[N];
void UPD(int x,int val){
    x+=1;
    while(x<=N){
        fen[x]+=val;
        x=x+(x&(-x));
    }
}
int GET(int x){
    x+=1;
    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 k=1;k<=n;k++)
    cin>>a[k];
int ans=1;
int j=0;
while(j<n && a[j]<=a[j+1]){
    UPD(a[j],1);
    j++;
}
j++;
int prev=a[j];
for(int k=j;k<=n;k++){
        int h=get(prev+1,a[k]-1);
    if(a[k]>a[k+1] || h!=0){
        ans++;
        prev=a[k+1];
    }
    else{
    prev=a[k];
    }
    UPD(a[k],1);
}
cout<<ans;
return 0;
}

Compilation message (stderr)

money.cpp:27:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

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