Submission #555049

#	Time	Username	Problem	Language	Result	Execution time	Memory
555049		Tien_Noob	Bigger segments (IZhO19_segments)	C++17	0 / 100	1 ms	340 KiB

segments

//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 pre, cur, a[N + 1];
int n, res;
set<tuple<long long, int, int> > Set;
void read()
{
    cin >> n;
    Set.insert(make_tuple(0, 0, 0));
    for (int i = 1; i <= n; ++ i)
    {
        cin >> a[i];
        a[i] += a[i - 1];
        auto it = Set.upper_bound(make_tuple(a[i], N + 1, N + 1));
        --it;
        res = get<1> (*it) + 1;
        cur = a[i] * 2 - a[get<2> (*it)];
        while(true)
        {
            it = Set.lower_bound(make_tuple(cur, N + 1, N + 1));
            if (it == Set.end() || get<2> (*it) > res)
            {
                break;
            }
            Set.erase(it);
        }
        Set.insert(make_tuple(cur, res, i));
    }
}
void solve()
{
    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)

segments.cpp: In function 'int main()':
segments.cpp:45:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |         freopen(TASK".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 13
• Subtask 2: 0 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27