Submission #548839

#	Time	Username	Problem	Language	Result	Execution time	Memory
548839		idas	Art Exhibition (JOI18_art)	C++11	50 / 100	30 ms	964 KiB

art

#include <bits/stdc++.h>
#define FOR(i, begin, end) for(int i=(begin); i<(end); i++)
#define pb push_back

using namespace std;
typedef vector<int> vi;
typedef long long ll;

const int N=5e3+10;
int n;
vi in;
ll a[N], b[N], p[N];

bool cmp(int i, int j)
{
    return a[i]<=a[j];
}

int main()
{
    cin >> n;
    FOR(i, 0, n)
    {
        cin >> a[i] >> b[i];
        in.pb(i);
    }

    sort(in.begin(), in.end(), cmp);

    FOR(k, 0, n)
    {
        int i=in[k];
        p[k+1]=p[k]+b[i];
    }

    ll ans=0;
    FOR(k, 0, n)
    {
        int i=in[k];
        //cout << a[i] << " " << b[i] << endl;
        FOR(b, k, n)
        {
            int j=in[b];
            ll sum=p[b+1]-p[k];
            //cout << k << " " << b << " " << sum << endl;
            ans=max(ans, sum-a[j]+a[i]);
        }
    }

    cout << ans;
}

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