Submission #993461

#	Time	Username	Problem	Language	Result	Execution time	Memory
993461		AndrijaM	Global Warming (NOI13_gw)	C++14	40 / 40	185 ms	26196 KiB

gw

#include <bits/stdc++.h>

using namespace std;

#define int long long

const int maxn=1e6+10;
const int mod=1e9+7;

struct st
{
    int val;
    int idx;
}v[maxn];

bool vis[maxn];

bool S(st x,st y)
{
    return x.val<y.val;
}

signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    ///freopen("prieteni.in","r",stdin);
    ///freopen("prieteni.out","w",stdout);
    int n;
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        cin>>v[i].val;
        v[i].idx=i;
    }
    vis[0]=vis[n+1]=1;
    sort(v+1,v+n+1,S);
    int ans=1;
    int sum=1;
    int i=1;
    while(i<=n)
    {
        int j=i-1;
        while(j+1<=n && v[j+1].val==v[i].val)
        {
            j++;
        }
        for(;i<=j;i++)
        {
            int ind=v[i].idx;
            if(vis[ind-1]==1 && vis[ind+1]==1)
            {
                sum--;
            }
            if(!vis[ind-1] && !vis[ind+1])
            {
                sum++;
            }
            vis[ind]=1;
        }
        ans=max(ans,sum);
    }
    cout<<ans<<endl;
    return 0;
}

• Subtask 1: 6 / 6
• Subtask 2: 6 / 6
• Subtask 3: 7 / 7
• Subtask 4: 10 / 10
• Subtask 5: 11 / 11