Submission #78516

#	Time	Username	Problem	Language	Result	Execution time	Memory
78516		igzi	Global Warming (CEOI18_glo)	C++17	100 / 100	164 ms	23228 KiB

glo

#include <bits/stdc++.h>
#define maxN 200005

using namespace std;

int a[maxN],d[maxN],n,x,i;

void LDS(){
vector <int> v;
for(int i=0;i<n;i++) v.push_back(0);
for(int i=n-1;i>=0;i--){
    int tmp=upper_bound(v.begin(),v.end(),a[i])-v.begin()-1;
    v[tmp]=a[i];
    d[i]=n-tmp;
    //cout<<i<<" "<<d[i]<<endl;
}
}
int LIS(){
vector <int> v;
int ans=0;
for(int i=0;i<n;i++){
    int tmp=lower_bound(v.begin(),v.end(),a[i])-v.begin();
    int p;
    p=lower_bound(v.begin(),v.end(),a[i]+x)-v.begin();
    //cout<<p<<" "<<d[i]<<endl;
    ans=max(ans,p+d[i]);
    if(tmp==v.size()) v.push_back(a[i]);
    else v[tmp]=a[i];
}
return ans;
}

int main() {
    cin>>n>>x;
    for(i=0;i<n;i++) cin>>a[i];
    LDS();
    cout<<LIS()<<endl;
    return 0;
}

Compilation message (stderr)

glo.cpp: In function 'int LIS()':
glo.cpp:27:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(tmp==v.size()) v.push_back(a[i]);
        ~~~^~~~~~~~~~

• 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