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468E3100· legendary gm2s512 MB⌨ stdin/stdout

Sample 1of 2

Input

3 1
1 1 2

Output

Sample 2of 2

Input

10 10
3 3 367056794
6 2 124561273
1 3 46718146
6 9 415916869
10 5 985968336
3 1 526792265
1 4 386357058
10 4 349304187
2 7 102032499
3 6 502679075

Output

233333333

468E.cpp

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Ln 11·137 BGNU C++20 (64)