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15449 Power Sequence binary search brute force math number theory ternary search Statement B Codeforces Round 666 (Div. 2) {1397} PROGRAMMING 1000.0 Codeforces Round #666 — Editorial
2025 Red-Black Pepper binary search brute force greedy math number theory sortings ternary search Statement E Educational Codeforces Round 135 (Rated for Div. 2) {1728} PROGRAMMING 106805