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Submission #867673

# Submission time Handle Problem Language Result Execution time Memory
867673 2023-10-29T06:06:44 Z sleepntsheep Star triangles (IZhO11_triangle) C++17
100 / 100
 155 ms 5132 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <deque>
#include <set>
#include <utility>
#include <array>

#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2,tune=native")

using namespace std;
#define ALL(x) x.begin(), x.end()
#define ShinLena cin.tie(nullptr)->sync_with_stdio(false);
using ll = long long;
#define N 300005

int n, C, c[N], b[N];
array<int, 2> a[N]; ll z;

int main()
{
    ShinLena;
    for (int i = (cin >> n, 0); i < n; ++i) cin >> a[i][0] >> a[i][1], c[C++] = a[i][1];
    sort(c, c+C);
    for (int i = 0; i < n; ++i) ++b[a[i][1] = lower_bound(c, c+C, a[i][1]) - c];
    sort(a, a+n); n = unique(a, a+n) - a;
    for (ll f, e = 0, d = 0, i = 0, l = -1; i < n; ++i)
    {
        f = a[i][0] == l;
        l += (a[i][0] - l) * !f, d *= f, e *= f;
        z += d + (b[a[i][1]] - 1ll) * e;
        ++e, d += b[a[i][1]] - 1;
    }
    cout << z;
    return 0;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2392 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2392 KB Output is correct
12 Correct 4 ms 2592 KB Output is correct
13 Correct 3 ms 2396 KB Output is correct
14 Correct 4 ms 2396 KB Output is correct
15 Correct 43 ms 4700 KB Output is correct
16 Correct 48 ms 4716 KB Output is correct
17 Correct 42 ms 4696 KB Output is correct
18 Correct 42 ms 4700 KB Output is correct
19 Correct 126 ms 4964 KB Output is correct
20 Correct 90 ms 4696 KB Output is correct
21 Correct 144 ms 5132 KB Output is correct
22 Correct 155 ms 5132 KB Output is correct