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1022 PolandBall and Many Other Balls combinatorics divide and conquer dp fft math number theory Statement G 8VC Venture Cup 2017 - Elimination Round {755} PROGRAMMING 8VC Venture Cup 2017 — Elimination Round [Editorial] 3100
218 Test Data Generation combinatorics divide and conquer dp fft math number theory Statement F VK Cup 2017 - Round 3 {773} PROGRAMMING VK Cup 2017 Round 3 + Codeforces Round #412 -- Tutorial 3400
2703 Mocha and Stars combinatorics dp fft math number theory Statement E Codeforces Round 738 (Div. 2) {1559} PROGRAMMING 3000.0 Tutorial (en) 2200
427 Basis combinatorics fft math number theory Statement F Educational Codeforces Round 123 (Rated for Div. 2) {1644} PROGRAMMING 100227
2261 Partial Sorting combinatorics fft math number theory Statement E Codeforces Round 842 (Div. 2) {1768} PROGRAMMING 2250.0 Codeforces Round #842 (Div. 2) Editorial