combinatorics - Problem Set

ID	Problem Show tags Hide tags	AC / Tried	Difficulty
3513	CF1365G Secure Password bitmasks combinatorics constructive algorithms interactive math *2800	0 / 0	(None)
3507	CF1366E Two Arrays binary search brute force combinatorics constructive algorithms dp two pointers *2100	0 / 0	(None)
3467	CF1371E1 Asterism (Easy Version) binary search brute force combinatorics math number theory sortings *1900	0 / 0	(None)
3466	CF1371E2 Asterism (Hard Version) binary search combinatorics dp math number theory sortings *2300	0 / 0	(None)
3403	CF1383E Strange Operation combinatorics data structures dp *2800	0 / 0	(None)
3366	CF1391C Cyclic Permutations combinatorics dp graphs math *1500	0 / 0	(None)
3355	CF1392H ZS Shuffles Cards combinatorics dp math probabilities *3000	0 / 0	(None)
3311	CF1400D Zigzags brute force combinatorics data structures math two pointers *1900	0 / 0	(None)
3308	CF1400G Mercenaries bitmasks brute force combinatorics dp dsu math two pointers *2600	0 / 0	(None)
3297	CF1402C Star Trek special problem combinatorics dfs and similar dp games graphs matrices trees 2600	0 / 0	(None)
3294	CF1403C Chess Rush special problem combinatorics dp implementation math 3200	0 / 0	(None)
3267	CF1408G Clusterization Counting combinatorics dp dsu fft graphs trees *2700	0 / 0	(None)
3223	CF1418E Expected Damage binary search combinatorics probabilities *2400	0 / 0	(None)
3208	CF1420D Rescue Nibel! combinatorics data structures sortings *1800	0 / 0	(None)
3198	CF1422C Bargain combinatorics dp math *1700	0 / 0	(None)
3172	CF1425D Danger of Mad Snakes combinatorics dp math *2300	0 / 0	(None)
3161	CF1426F Number of Subsequences combinatorics dp strings *2000	0 / 0	(None)
3118	CF1433E Two Round Dances combinatorics math *1300	0 / 0	(None)
3111	CF1436C Binary Search binary search combinatorics *1500	0 / 0	(None)
3108	CF1436F Sum Over Subsets combinatorics math number theory *2800	0 / 0	(None)
3101	CF1437F Emotional Fishermen combinatorics dp math two pointers *2600	0 / 0	(None)
3088	CF1439D INOI Final Contests combinatorics dp fft *3100	0 / 0	(None)
3083	CF1442B Identify the Operations combinatorics data structures dsu greedy implementation *1800	0 / 0	(None)
3071	CF1444B Divide and Sum combinatorics math sortings *1900	0 / 0	(None)
3045	CF1450H1 Multithreading (Easy Version) combinatorics fft math *2900	0 / 0	(None)
3044	CF1450H2 Multithreading (Hard Version) combinatorics implementation math *3300	0 / 0	(None)
3032	CF1452D Radio Towers combinatorics dp math *1600	0 / 0	(None)
3017	CF1454E Number of Simple Paths combinatorics dfs and similar graphs trees *2000	0 / 0	(None)
2986	CF1462E1 Close Tuples (easy version) binary search combinatorics math sortings two pointers *1500	0 / 0	(None)
2985	CF1462E2 Close Tuples (hard version) binary search combinatorics implementation math sortings two pointers *1700	0 / 0	(None)
2967	CF1466G Song of the Sirens combinatorics divide and conquer hashing math string suffix structures strings *2600	0 / 0	(None)
2966	CF1466H Finding satisfactory solutions combinatorics dp graphs greedy math *3300	0 / 0	(None)
2961	CF1467D Sum of Paths combinatorics dp math *2200	0 / 0	(None)
2932	CF1470E Strange Permutation binary search combinatorics data structures dp graphs implementation two pointers *3200	0 / 0	(None)
2914	CF1473G Tiles combinatorics dp fft math *2800	0 / 0	(None)
2904	CF1475C Ball in Berland combinatorics graphs math *1400	0 / 0	(None)
2901	CF1475E Advertising Agency combinatorics math sortings *1600	0 / 0	(None)
2885	CF1477F Nezzar and Chocolate Bars combinatorics fft math probabilities *3500	0 / 0	(None)
2850	CF1485F Copy or Prefix Sum combinatorics data structures dp sortings *2400	0 / 0	(None)
2842	CF1486F Pairs of Paths combinatorics data structures dfs and similar dp trees *2600	0 / 0	(None)
2834	CF1487G String Counting combinatorics dp fft math *2700	0 / 0	(None)
2826	CF1488H Build From Suffixes special problem combinatorics data structures 2800	0 / 0	(None)
2783	CF1495D BFS Trees combinatorics dfs and similar graphs math shortest paths trees *2600	0 / 0	(None)
2763	CF1499A Domino on Windowsill combinatorics constructive algorithms math *800	0 / 0	(None)
2759	CF1499E Chaotic Merge combinatorics dp math strings *2400	0 / 0	(None)
2757	CF1499F Diameter Cuts combinatorics dfs and similar dp trees *2400	0 / 0	(None)
2741	CF1503E 2-Coloring combinatorics dp math *3100	0 / 0	(None)
2718	CF1508B Almost Sorted binary search combinatorics constructive algorithms implementation *1800	0 / 0	(None)
2693	CF1511E Colorings and Dominoes combinatorics dp greedy math *2100	0 / 0	(None)
2681	CF1513B AND Sequences bitmasks combinatorics constructive algorithms math *1400	0 / 0	(None)
2677	CF1513E Cost Equilibrium combinatorics constructive algorithms math sortings *2300	0 / 0	(None)
2674	CF1514B AND 0, Sum Big bitmasks combinatorics math *1200	0 / 0	(None)
2665	CF1515E Phoenix and Computers combinatorics dp math *2200	0 / 0	(None)
2655	CF1516E Baby Ehab Plays with Permutations combinatorics dp math *2500	0 / 0	(None)
2649	CF1517F Reunion combinatorics dp trees *3200	0 / 0	(None)
2619	CF1523E Crypto Lights combinatorics dp math probabilities *2600	0 / 0	(None)
2610	CF1525E Assimilation IV combinatorics dp math probabilities two pointers *2100	0 / 0	(None)
2603	CF1526E Oolimry and Suffix Array combinatorics constructive algorithms math *2400	0 / 0	(None)
2596	CF1527D MEX Tree combinatorics dfs and similar implementation math trees *2400	0 / 0	(None)
2593	CF1528B Kavi on Pairing Duty combinatorics dp math *1700	0 / 0	(None)
2589	CF1528E Mashtali and Hagh Trees combinatorics dp trees *2900	0 / 0	(None)
2588	CF1528F AmShZ Farm combinatorics fft math *3300	0 / 0	(None)
2579	CF1530F Bingo bitmasks combinatorics dp math probabilities *2600	0 / 0	(None)
2556	CF1534C Little Alawn's Puzzle combinatorics dp dsu graphs math *1300	0 / 0	(None)
2538	CF1536E Omkar and Forest combinatorics graphs math shortest paths *2300	0 / 0	(None)
2537	CF1536F Omkar and Akmar chinese remainder theorem combinatorics constructive algorithms fft games geometry math meet-in-the-middle string suffix structures *2600	0 / 0	(None)
2518	CF1539A Contest Start combinatorics geometry greedy math *1000	0 / 0	(None)
2510	CF1540B Tree Array brute force combinatorics dp graphs math probabilities trees *2300	0 / 0	(None)
2499	CF1542D Priority Queue combinatorics dp implementation math ternary search *2200	0 / 0	(None)
2498	CF1542E1 Abnormal Permutation Pairs (easy version) combinatorics dp fft math *2400	0 / 0	(None)
2497	CF1542E2 Abnormal Permutation Pairs (hard version) combinatorics dp fft math *2700	0 / 0	(None)
2495	CF1543B Customising the Track combinatorics greedy math *900	0 / 0	(None)
2488	CF1545B AquaMoon and Chess combinatorics math *1900	0 / 0	(None)
2487	CF1545C AquaMoon and Permutations 2-sat brute force combinatorics constructive algorithms graph matchings graphs *2800	0 / 0	(None)
2470	CF1548C The Three Little Pigs combinatorics dp fft math *2500	0 / 0	(None)
2460	CF1550D Excellent Arrays binary search combinatorics constructive algorithms implementation math sortings two pointers *2300	0 / 0	(None)
2449	CF1551F Equidistant Vertices brute force combinatorics dfs and similar dp trees *2200	0 / 0	(None)
2447	CF1552B Running for Gold combinatorics graphs greedy sortings *1500	0 / 0	(None)
2445	CF1552C Maximize the Intersections combinatorics constructive algorithms geometry greedy sortings *1800	0 / 0	(None)
2433	CF1553E Permutation Shift brute force combinatorics constructive algorithms dfs and similar dsu graphs math *2100	0 / 0	(None)
2429	CF1553I Stairs combinatorics divide and conquer dp fft math *3400	0 / 0	(None)
2409	CF1556F Sports Betting bitmasks combinatorics dp graphs math probabilities *2500	0 / 0	(None)
2404	CF1557C Moamen and XOR bitmasks combinatorics dp math matrices *1700	0 / 0	(None)
2397	CF1558D Top-Notch Insertions combinatorics data structures *2600	0 / 0	(None)
2388	CF1559E Mocha and Stars combinatorics dp fft math number theory *2200	0 / 0	(None)
2356	CF1567C Carrying Conundrum bitmasks combinatorics dp math *1600	0 / 0	(None)
2350	CF1569C Jury Meeting combinatorics math *1500	0 / 0	(None)
2325	CF1574B Combinatorics Homework combinatorics greedy math *1100	0 / 0	(None)
2321	CF1574E Coloring combinatorics constructive algorithms implementation math *2500	0 / 0	(None)
2320	CF1574F Occurrences combinatorics dfs and similar dp dsu fft graphs *2700	0 / 0	(None)
2278	CF1580B Mathematics Curriculum brute force combinatorics dp trees *2600	0 / 0	(None)
2274	CF1580F Problems for Codeforces combinatorics fft math *3300	0 / 0	(None)
2273	CF1581A CQXYM Count Permutations combinatorics math number theory *800	0 / 0	(None)
2270	CF1582B Luntik and Subsequences combinatorics math *900	0 / 0	(None)
2250	CF1584D Guess the Permutation binary search combinatorics interactive math *2000	0 / 0	(None)
2240	CF1585F Non-equal Neighbours combinatorics dp math *2400	0 / 0	(None)
2238	CF1586I Omkar and Mosaic combinatorics constructive algorithms math *3500	0 / 0	(None)
2215	CF1594E1 Rubik's Cube Coloring (easy version) combinatorics math *1300	0 / 0	(None)
2208	CF1598D Training Session combinatorics data structures geometry implementation math *1700	0 / 0	(None)
2207	CF1598E Staircases brute force combinatorics data structures dfs and similar dp implementation math *2100	0 / 0	(None)

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