oj.uz

Submission #18409

# Submission time Handle Problem Language Result Execution time Memory
18409 2016-02-01T03:34:34 Z kdh9949 Star triangles (IZhO11_triangle) C++
86.36 / 100
 2000 ms 5772 KB 
#include <cstdio>
#include <algorithm>
using namespace std;
typedef long long ll;

struct Point{
    int x, y;
}p[200010];

int n, x[200010], y[200010], xsum[200010], ysum[200010];
ll ans;

int main(){
    scanf("%d", &n);
    for(int i = 0; i < n; i++){
        scanf("%d%d", x + i, y + i);
        p[i] = {x[i], y[i]};
    }
    sort(x, x + n);
    sort(y, y + n);
    for(int i = 0; i < n; i++){
        p[i] = {(int)(lower_bound(x, x + n, p[i].x) - x), (int)(lower_bound(y, y + n, p[i].y) - y)};
        xsum[p[i].x]++;
        ysum[p[i].y]++;
    }
    for(int i = 0; i < n; i++){
        ans += (ll)(xsum[p[i].x] - 1) * (ll)(ysum[p[i].y] - 1);
    }
    printf("%lld", ans);
}

Subtask #1
86.364 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 5772 KB Output is correct
2 Correct 0 ms 5772 KB Output is correct
3 Correct 0 ms 5772 KB Output is correct
4 Correct 0 ms 5772 KB Output is correct
5 Correct 0 ms 5772 KB Output is correct
6 Correct 0 ms 5772 KB Output is correct
7 Correct 0 ms 5772 KB Output is correct
8 Correct 0 ms 5772 KB Output is correct
9 Correct 1 ms 5772 KB Output is correct
10 Correct 0 ms 5772 KB Output is correct
11 Correct 0 ms 5772 KB Output is correct
12 Correct 3 ms 5772 KB Output is correct
13 Correct 6 ms 5772 KB Output is correct
14 Correct 9 ms 5772 KB Output is correct
15 Correct 96 ms 5772 KB Output is correct
16 Correct 95 ms 5772 KB Output is correct
17 Correct 97 ms 5772 KB Output is correct
18 Correct 94 ms 5772 KB Output is correct
19 Execution timed out 2000 ms 5768 KB Program timed out
20 Correct 173 ms 5772 KB Output is correct
21 Execution timed out 2000 ms 5768 KB Program timed out
22 Execution timed out 2000 ms 5768 KB Program timed out