cf/mirror

Number of Triplets

CF
181B1300· pupil2s256 MB⌨ stdin/stdout
#binary search#brute force

Examples

Sample 1of 2
Input
3
1 1
2 2
3 3
Output
1
Sample 2of 2
Input
3
0 0
-1 0
0 1
Output
0
181B.cpp
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Ln 11·137 BGNU C++20 (64)