Submission #1048591

#	Time	Username	Problem	Language	Result	Execution time	Memory
1048591		MrAndria	Global Warming (CEOI18_glo)	C++14	100 / 100	65 ms	4304 KiB

glo

#include <bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define pb push_back
//#define int long long
int p[200005];
int a[200005],mx,n,k,x;

int main(){ 
    cin>>n>>x;
    for(int i=1;i<=n;i++){
        cin>>a[i];
    }
    vector <int> v;


    for(int i=1;i<=n;i++){
        k=lower_bound(v.begin(),v.end(),a[i])-v.begin();
        if(k==v.size()){
            v.pb(a[i]);
        }else{
            v[k]=a[i];
        }
        p[i]=k+1;

    }
    v.clear();

    mx=max(mx,p[n]);
    for(int i=n;i>=1;i--){
        k=lower_bound(v.begin(),v.end(),x-a[i])-v.begin();
        mx=max(mx,p[i]+k);
        k=lower_bound(v.begin(),v.end(),-a[i])-v.begin();
        if(k==v.size()){
            v.pb(-a[i]);
        }else{
            v[k]=-a[i];
        }
    }
    cout<<mx<<endl;


}

Compilation message (stderr)

glo.cpp: In function 'int main()':
glo.cpp:20:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |         if(k==v.size()){
      |            ~^~~~~~~~~~
glo.cpp:35:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         if(k==v.size()){
      |            ~^~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 13 / 13
• Subtask 4: 10 / 10
• Subtask 5: 20 / 20
• Subtask 6: 17 / 17
• Subtask 7: 25 / 25