oj.uz

Submission #426136

# Submission time Handle Problem Language Result Execution time Memory
426136 2021-06-13T14:36:12 Z SuckTinHock Star triangles (IZhO11_triangle) C++17
0 / 100
 298 ms 33796 KB 
#include <bits/stdc++.h>
#define int long long
#define x first
#define y second

using namespace std;
typedef pair<int,int> Point;
Point P[300005];
int n;
int cntx[300005], cnty[300005];

void compress()
{
    vector<int> A;
    for (int i = 1; i <= n; ++i)
    {
        A.push_back(P[i].x);
        A.push_back(P[i].y);
    }
    sort(A.begin(),A.end());
    unique(A.begin(),A.end());
    for (int i = 1; i <= n; ++i)
    {
        P[i].x = lower_bound(A.begin(),A.end(),P[i].x) - A.begin();
        P[i].y = lower_bound(A.begin(),A.end(),P[i].y) - A.begin();
    }
}

void xuly()
{
    int res = 0;
    compress();
    sort(P+1,P+n+1);
    vector<pair<Point,int> > PP;
    for (int i = 1; i <= n; ++i)
    {
        PP.push_back({P[i],1});
        while (i+1 <= n && P[i] == P[i+1]) ++PP.back().y, ++i;
        cntx[P[i].x] += PP.back().y;
        cnty[P[i].y] += PP.back().y;
    }
    for (pair<Point,int> T : PP)
    {
        Point X = T.x;
        int cnt = T.y;
        res += (cntx[X.x] - cnt) * (cnty[X.y] - cnt);
    }
    cout << res;
}

void nhap()
{
    cin >> n;
    for (int i = 1; i <= n; ++i) cin >> P[i].x >> P[i].y;
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    nhap();
    xuly();
    return 0;
}

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 324 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 324 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 8 ms 1328 KB Output is correct
13 Correct 9 ms 1488 KB Output is correct
14 Correct 8 ms 1484 KB Output is correct
15 Correct 102 ms 11856 KB Output is correct
16 Correct 101 ms 12624 KB Output is correct
17 Correct 100 ms 11964 KB Output is correct
18 Correct 94 ms 11916 KB Output is correct
19 Incorrect 298 ms 33796 KB Output isn't correct
20 Halted 0 ms 0 KB -