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3343 Single-use Stones binary search flows greedy two pointers Statement D Codeforces Round 476 (Div. 2) [Thanks, Telegram!] {965} PROGRAMMING Analysis of Codeforces Round #476 (Div. 2) [Thanks, Telegram!] 1900
3203 Canteen (Easy Version) binary search data structures flows greedy two pointers Statement B1 Codeforces Round 1012 (Div. 1) {2089} PROGRAMMING 1000.0 Codeforces Round 1012 (Div.1, Div. 2, based on THUPC 2025 — Finals) Editorial