Question

诪住驻专 N 讬拽专讗 诪讜爪诇讞 讗诐 讛讜讗 诪拽讬讬诐 讗转 砖谞讬 讛转谞讗讬诐 讛讘讗讬诐:
* N 讛讜讗 诪住驻专 讞讬讜讘讬 砖诇诐 砖诪转讞诇拽 讘-101,
* 讘专讬砖讜诐 砖诇 N 诪讜驻讬注讜转 讘讚讬讜拽 砖转讬 住驻专讜转 诇讗 讗驻住讬讜转.
诇诪砖诇 讛诪住驻专 2020 讛讜讗 诪讜爪诇讞, 讜讗讬诇讜 讛诪住驻专 12120 讗讬谞讜 诪讜爪诇讞 讻讬 讬砖 讘讜 4 住驻专讜转 诇讗 讗驻住讬讜转.
诪爪讗讜 讗转 讻诪讜转 讛诪住驻专讬诐 讛诪讜爪诇讞讬诐 砖拽讟谞讬诐 诪- `10^40`.

Topics:
Number Theory -> Modular Arithmetic / Remainder Arithmetic -> Divisibility Rules Combinatorics -> Case Analysis / Checking Cases -> Processes / Procedures
Sources:
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