Submission #1285646

#	Time	Username	Problem	Language	Result	Execution time	Memory
1285646		Faisal_Saqib	Money (IZhO17_money)	C++20	45 / 100	1 ms	580 KiB

money

#include <bits/stdc++.h>
using namespace std;
const int N=400;
int dp[N];
int a[N],valid[N],nxt[N];
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n;
    cin>>n;
    set<int> vis={1000000000};
    nxt[0]=1e9;
    for(int i=1;i<=n;i++)
    {
        cin>>a[i];
        auto it=vis.upper_bound(a[i]);
        nxt[i]=*it;
        vis.insert(a[i]);
        valid[i]=i-1;
        if(a[i-1]<=a[i])
        {
            valid[i]=valid[i-1];
        }
    }
    dp[0]=0;
    for(int i=1;i<=n;i++)
    {
        dp[i]=i;
        // dp[i]= min(dp[ip])  valid[i]-1<=ip  and not element in prefix ip is in the range [a[ip+1],a[i]]
        // dp[i] = min(dp[ip]) valid[i]-1<=ip and nxt[ip]>=a[i]
        for(int ip=i-1;ip>=valid[i];ip--)
        {   
            if(nxt[ip+1]>=a[i])
            {
                dp[i]=min(dp[i],dp[ip]+1);
            }
        }
    }
    cout<<dp[n]<<endl;
}

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