Submission #503874

#	Time	Username	Problem	Language	Result	Execution time	Memory
503874		krit3379	Global Warming (CEOI18_glo)	C++14	62 / 100	46 ms	4572 KiB

glo

#include<bits/stdc++.h>
using namespace std;
#define N 300005

int a[N],b[N],c[N],dp1[N];
vector<int> s1,s2;

int main(){
    int n,d,i,ans=0;
    scanf("%d %d",&n,&d);
    for(i=1;i<=n;i++)scanf("%d",&a[i]),b[i]=-a[i];
    for(i=1;i<=n;i++){
        auto x=lower_bound(s1.begin(),s1.end(),a[i]);
        if(x==s1.end())s1.push_back(a[i]);
        else *x=a[i];
        dp1[i]=s1.size();
        c[i]=s1.back();
    }
    for(i=n;i>0;i--){
        int it=lower_bound(s2.begin(),s2.end(),-c[i]+d)-(s2.begin());
        ans=max(ans,dp1[i]+it);
        auto x=lower_bound(s2.begin(),s2.end(),b[i]);
        if(x==s2.end())s2.push_back(b[i]);
        else *x=b[i];
        //printf("i=%d dp=%d it=%d\n",i,dp1[i-1],it);
    }
    printf("%d\n",ans);
    return 0;
}

Compilation message (stderr)

glo.cpp: In function 'int main()':
glo.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%d %d",&n,&d);
      |     ~~~~~^~~~~~~~~~~~~~~
glo.cpp:11:27: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     for(i=1;i<=n;i++)scanf("%d",&a[i]),b[i]=-a[i];
      |                      ~~~~~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 0 / 13
• Subtask 4: 10 / 10
• Subtask 5: 20 / 20
• Subtask 6: 17 / 17
• Subtask 7: 0 / 25