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101C2000· candidate master1s256 MB⌨ stdin/stdout

#implementation #math

Examples

Sample 1of 3

Input

0 0
1 1
0 1

Output

YES

Sample 2of 3

Input

0 0
1 1
1 1

Output

YES

Sample 3of 3

Input

0 0
1 1
2 2

Output

NO

101C.cpp

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Ln 11·137 BGNU C++20 (64)