Submission #419410

#	Time	Username	Problem	Language	Result	Execution time	Memory
419410		Trickster	Art Exhibition (JOI18_art)	C++14	0 / 100	1 ms	204 KiB

art

//Suleyman Atayew

#include <algorithm>
#include <iostream>
#include <string.h>
#include <stdio.h>
#include <vector>
#include <bitset>
#include <queue>
#include <cmath>
#include <map>
#include <set>
 
#define N 500010
#define ff first
#define ss second
#define pb push_back
#define ll long long
#define mod 1000000007
#define pii pair <ll, ll>
#define sz(a) (ll)(a.size())
ll bigmod(ll a, ll b) { if(b==0)return 1; ll ret = bigmod(a, b/2); return ret * ret % mod * (b%2 ? a : 1) % mod; }

using namespace std;

ll n;
pii p[N];

ll f(ll x)
{
    ll ret = 0, sum = 0;

    for(ll i = 1; i <= n; i++) {
        sum += p[i].ss;

        if(i >= x) {
            ret = max(ret, sum - (p[i].ff - p[i-x+1].ff));

            sum -= p[i-x+1].ss;
        }
    }
    return ret;
}

int main()
{
    ios::sync_with_stdio(false);
	cin.tie(0);

    cin >> n;

    ll sum = 0, ans = 0;
    for(ll i = 1; i <= n; i++)
        cin >> p[i].ff >> p[i].ss;

    sort(p+1, p+n+1);

    ll l = 1, r = n;
    for(ll i = 20; i >= 0; i--) {
        ll md1 = l + (r-l)/3;
        ll md2 = r - (r-l)/3;

        if(f(md1) > f(md2)) r = md2-1;
        else if(f(md1) == f(md2)) l = md1, r = md2;
        else l = md1+1;
    }

    cout << f(l);
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:52:8: warning: unused variable 'sum' [-Wunused-variable]
   52 |     ll sum = 0, ans = 0;
      |        ^~~
art.cpp:52:17: warning: unused variable 'ans' [-Wunused-variable]
   52 |     ll sum = 0, ans = 0;
      |                 ^~~

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