Submission #315362

#	Time	Username	Problem	Language	Result	Execution time	Memory
315362		Dymo	Art Exhibition (JOI18_art)	C++14	100 / 100	206 ms	20984 KiB

art

#include<bits/stdc++.h>

using namespace std;


#define pb	push_back
#define ll long long
#define pll pair<ll,ll>
#define ff first
#define ss second
#define endl "\n"
const ll maxn=5e5+50;
const ll mod =1e9+7;
const ll base=113;
pll a[maxn];
ll f[maxn];

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    if (fopen("GIDDY.inp", "r"))
    {
        freopen("GIDDY.inp", "r", stdin);
        freopen("GIDDY.out", "w", stdout) ;
    }
    ll n;
    cin>>n ;
    for (int i=1;i<=n;i++)
    {
        cin>>a[i].ff>>a[i].ss;
    }
    sort(a+1,a+n+1);
    ll ans=0;
    ll nw=0;
    ll mx=-1e15;
    for (int i=1;i<=n;i++)
    {
        ans=max(ans,a[i].ss);
        ll pre=nw;
        nw+=a[i].ss;
        ans=max(ans,nw-a[i].ff+mx);
        mx=max(mx,-pre+a[i].ff);

    }
    cout <<ans;




}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:26:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   26 |         freopen("GIDDY.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:27:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   27 |         freopen("GIDDY.out", "w", stdout) ;
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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