Submission #36150

#	Time	Username	Problem	Language	Result	Execution time	Memory
36150		Kanvie	Money (IZhO17_money)	C++14	0 / 100	0 ms	6080 KiB

money

#include<bits/stdc++.h>
using namespace std;
int f[1000001],n,ans=0,trc=0,trc_M,x,mx=0;
void update(int pos,int value)
{
    mx=max(mx,pos);
    for (int i=pos; i<=mx; i+=(i&(-i)))f[i]+=value;
}
int get(int pos)
{
    int r=0;
    for (int i=pos; i>=1; i-=(i&(-i)))r+=f[i];
    return r;
}
int main()
{
    ios_base::sync_with_stdio(false);cin.tie(0);
    stack<int>q;
    scanf("%d",&n);
    while(n--)
    {
        scanf("%d",&x);
        if(ans==0||x<trc||(trc_M+1<x&&get(x-1)-get(trc_M)>0))
        {
            ans++;
            trc=x;
            trc_M=x;
            while(!q.empty())
            {
                update(q.top(),1);
                q.pop();
            }
            q.push(x);
        }
        else
        {
            trc=x;
            q.push(x);
        }
    }
    printf("%d",ans);
}

Compilation message (stderr)

money.cpp: In function 'int main()':
money.cpp:19:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
                   ^
money.cpp:22:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&x);
                       ^

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