Submission #86061

#	Time	Username	Problem	Language	Result	Execution time	Memory
86061		rzbt	Art Exhibition (JOI18_art)	C++14	0 / 100	2 ms	376 KiB

art

#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define MAXN 500005
typedef long long ll;


using namespace std;

ll n,seg[4*MAXN],lazy[4*MAXN];
pair<ll,ll> niz[MAXN];
ll parc[MAXN];

void dodaj(ll l,ll d,ll tl,ll td,ll k,ll x){
    if(lazy[k]){
        seg[k]+=(d-l+1)*lazy[k];
        if(d!=l){
            lazy[k+k]+=lazy[k];
            lazy[k+k+1]+=lazy[k];
        }
        lazy[k]=0;
    }
    if(l>td || d<tl)return;
    if(l>=tl && d<=td){
        lazy[k]=x;
        seg[k]+=(d-l+1)*lazy[k];
        if(d!=l){
            lazy[k+k]+=lazy[k];
            lazy[k+k+1]+=lazy[k];
        }
        lazy[k]=0;
        return;
    }

    ll mid=(l+d)/2;
    dodaj(l,mid,tl,td,k+k,x);
    dodaj(mid+1,d,tl,td,k+k+1,x);
    seg[k]=max(seg[k+k],seg[k+k+1]);

}

ll dobij(ll l,ll d,ll tl,ll td,ll k){
    if(lazy[k]){
        seg[k]+=(d-l+1)*lazy[k];
        if(d!=l){
            lazy[k+k]+=lazy[k];
            lazy[k+k+1]+=lazy[k];
        }
        lazy[k]=0;
    }
    if(l>td || d<tl)return 0;
    if(l>=tl && d<=td)return seg[k];
    ll mid=(l+d)/2;
    return min(dobij(l,mid,tl,td,k+k),dobij(mid+1,d,tl,td,k+k+1));


}






int main()
{
    scanf("%lld", &n);
    for(int i=1;i<=n;i++){
        scanf("%lld %lld",&niz[i].first,&niz[i].second);
    }
    sort(niz+1,niz+n+1);
    for(int i =1;i<=n;i++){
        parc[i]=parc[i-1]+niz[i].second;
        dodaj(1,n,i,i,1,parc[i]-niz[i].first);
    }
    ll res=0;
    for(int i =1;i<=n;i++){

        res=max(res,dobij(1,n,i,n,1)+niz[i].first);
        dodaj(1,n,i,n,1,-niz[i].second);

    }
    printf("%lld",res);
    return 0;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:69:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld", &n);
     ~~~~~^~~~~~~~~~~~
art.cpp:71:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld %lld",&niz[i].first,&niz[i].second);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 50