Submission #936559

#	Time	Username	Problem	Language	Result	Execution time	Memory
936559		Warinchai	Global Warming (NOI13_gw)	C++14	40 / 40	185 ms	31920 KiB

gw

#include<bits/stdc++.h>
#define int long long
using namespace std;
int ar[1000005];
int add[1000005];
vector<pair<int,int> >v;
int cnt=0;
int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n;cin>>n;
    for(int i=1;i<=n;i++){
        cin>>ar[i];
        v.push_back({ar[i],i});
    }
    sort(v.begin(),v.end(),greater<pair<int,int>>());
    int mx=0;
    int temp=0;
    pair<int,int>x;
    for(int i=0;i<n;){
        x=v[i];
        add[x.second]=1;
        temp=0;
        if(add[x.second-1])temp++;
        if(add[x.second+1])temp++;
        if(temp==0)cnt++;
        if(temp==2)cnt--;
        i++;
        while(i<n&&x.first==v[i].first){
            x=v[i];
            add[x.second]=1;
            temp=0;
            if(add[x.second-1])temp++;
            if(add[x.second+1])temp++;
            if(temp==0)cnt++;
            if(temp==2)cnt--;
            i++;
        }
        mx=max(mx,cnt);
    }
    cout<<mx;
}

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