Submission #543947

#	Time	Username	Problem	Language	Result	Execution time	Memory
543947		Tien_Noob	Art Exhibition (JOI18_art)	C++17	0 / 100	0 ms	340 KiB

art

//Make CSP great again
//Vengeance
#include <bits/stdc++.h>
#define TASK "TESTCODE"
#define Log2(x) 31 - __builtin_clz(x)
using namespace std;
const int N = 5e5;
long long a[N + 1], f[N + 1], b[N + 1];
int n, id[N + 1];
void read()
{
    cin >> n;
    for (int i = 1; i <= n; ++ i)
    {
        cin >> a[i] >> b[i];
        id[i] = i;
    }
    sort(id + 1, id + n + 1, [](const int &x, const int &y)
         {
             return a[x] < a[y];
         });
}
void solve()
{
    long long res = 0, t = a[id[1]];
    for (int i = 1; i <= n; ++ i)
    {
        f[i] = f[i - 1] + b[id[i]];
        res = max(res, -a[id[i]] + f[i] + t);
        t = max(t, -f[i - 1] + a[id[i]]);
        //cerr << f[i] << ' ';
    }
    cout << res;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (fopen(TASK".INP", "r"))
    {
        freopen(TASK".INP", "r", stdin);
        //freopen(TASK".OUT", "w", stdout);
    }
    int t = 1;
    bool typetest = false;
    if (typetest)
    {
        cin >> t;
    }
    for (int __ = 1; __ <= t; ++ __)
    {
        //cout << "Case " << __ << ": ";
        read();
        solve();
    }
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:41:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |         freopen(TASK".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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