Submission #170004

#	Time	Username	Problem	Language	Result	Execution time	Memory
170004		mhy908	Global Warming (CEOI18_glo)	C++14	0 / 100	2056 ms	207000 KiB

glo

#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define F first
#define S second
using namespace std;
typedef long long LL;
const LL llinf=9000000000000000000;
int n;
LL x, arr[200010];
vector<LL> lis, lds;
int dplis[200010], dplds[200010], ans;
LL minlds[200010];
pair<int, LL> change[200010];
int main()
{
    scanf("%d %lld", &n, &x);
    for(int i=1; i<=n; i++)scanf("%lld", &arr[i]);
    for(int i=1; i<=n; i++){
        auto it=lower_bound(lis.begin(), lis.end(), arr[i]);
        change[i]=mp(it-lis.begin(), it==lis.end()?llinf:*it);
        if(it==lis.end())lis.pb(arr[i]);
        else *it=min(arr[i], *it);
        dplis[i]=lower_bound(lis.begin(), lis.end(), minlds[i+1]+x)-lis.begin();
        ans=max(ans, dplis[i]+dplds[i+1]);
    }
    ans=dplis[n];
    arr[0]=-llinf;
    for(int i=n; i>=1; i--){
        lis[change[i].F]=change[i].S;
        puts("LIS : ");
        for(int j=0; j<lis.size(); j++)printf("%lld ", lis[j]);
        puts("");
        auto it=lower_bound(lds.begin(), lds.end(), -arr[i]);
        int temp1=it-lds.begin()+1;
        if(it==lds.end())lds.pb(-arr[i]);
        else *it=-arr[i];
        int temp2=lower_bound(lis.begin(), lis.end(), arr[i]+x)-lis.begin();
        ans=max(ans, temp1+temp2);
    }
    printf("%d", ans);
}

Compilation message (stderr)

glo.cpp: In function 'int main()':
glo.cpp:32:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0; j<lis.size(); j++)printf("%lld ", lis[j]);
                      ~^~~~~~~~~~~
glo.cpp:17:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %lld", &n, &x);
     ~~~~~^~~~~~~~~~~~~~~~~~~
glo.cpp:18:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i=1; i<=n; i++)scanf("%lld", &arr[i]);
                            ~~~~~^~~~~~~~~~~~~~~~~

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