제출 #169993

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
169993		mhy908	Global Warming (CEOI18_glo)	C++14	0 / 100	43 ms	3660 KiB

glo

#include <bits/stdc++.h>
#define pb push_back
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];
int main()
{
    scanf("%d %lld", &n, &x);
    for(int i=1; i<=n; i++)scanf("%lld", &arr[i]);
    for(int i=n; i>=1; i--){
        auto it=lower_bound(lds.begin(), lds.end(), -arr[i]);
        if(lds.back()<-arr[i])lds.pb(-arr[i]);
        else *it=-arr[i];
        dplds[i]=lds.size();
        minlds[i]=-lds[dplds[i]-1];
    }
    minlds[n+1]=llinf;
    for(int i=1; i<=n; i++){
        auto it=lower_bound(lis.begin(), lis.end(), arr[i]);
        if(lis.back()<arr[i])lis.pb(arr[i]);
        else *it=arr[i];
        dplis[i]=lower_bound(lis.begin(), lis.end(), minlds[i+1]+x)-lis.begin();
    }
    ans=dplds[1];
    for(int i=1; i<n; i++){
        ans=max(ans, dplis[i]+dplds[i+1]);
    }
    printf("%d", ans);
}

컴파일 시 표준 에러 (stderr) 메시지

glo.cpp: In function 'int main()':
glo.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %lld", &n, &x);
     ~~~~~^~~~~~~~~~~~~~~~~~~
glo.cpp:14:33: 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]);
                            ~~~~~^~~~~~~~~~~~~~~~~

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