Problem Set - HFOJ

	ID	Problem Show tags Hide tags	AC / Tried	Difficulty
	7530	P513F1 Scaygerboss flows *2700	0 / 0	10
	7528	P513F2 Scaygerboss flows *2800	0 / 0	10
	7526	P513G1 Inversions problem brute force dfs and similar dp meet-in-the-middle *1800	0 / 0	6
	7524	P513G2 Inversions problem dp probabilities *2400	0 / 0	9
	7523	P513G3 Inversions problem dp *3100	0 / 0	10
	7520	P514A Chewbaсca and Number greedy implementation *1200	0 / 0	4
	7518	P514B Han Solo and Lazer Gun brute force data structures geometry implementation math *1400	0 / 0	4
	7516	P514C Watto and Mechanism binary search data structures hashing string suffix structures strings *2000	0 / 0	7
	7514	P514D R2D2 and Droid Army binary search data structures two pointers *2000	0 / 0	7
	7512	P514E Darth Vader and Tree dp matrices *2200	0 / 0	8
	7510	P515A Drazil and Date math *1000	0 / 0	3
	7509	P515B Drazil and His Happy Friends brute force dsu meet-in-the-middle number theory *1300	0 / 0	4
	7506	P515C Drazil and Factorial greedy math sortings *1400	0 / 0	4
	7505	P515D Drazil and Tiles constructive algorithms greedy *2000	0 / 0	7
	7503	P515E Drazil and Park data structures *2300	0 / 0	8
	7502	P516D Drazil and Morning Exercise dfs and similar dp dsu trees two pointers *2800	0 / 0	10
	7499	P516E Drazil and His Happy Friends math number theory *3100	0 / 0	10
	7498	P518A Vitaly and Strings constructive algorithms strings *1600	0 / 0	5
	7495	P518B Tanya and Postcard greedy implementation strings *1400	0 / 0	4
	7493	P518C Anya and Smartphone constructive algorithms data structures implementation *1600	0 / 0	5
	7491	P518D Ilya and Escalator combinatorics dp math probabilities *1700	0 / 0	5
	7489	P518E Arthur and Questions greedy implementation math ternary search *2200	0 / 0	8
	7487	P518F Pasha and Pipe binary search brute force combinatorics dp implementation *2300	0 / 0	8
	7486	P519A A and B and Chess implementation *900	0 / 0	3
	7485	P519B A and B and Compilation Errors data structures implementation sortings *1100	0 / 0	3
	7484	P519C A and B and Team Training greedy implementation math number theory *1300	0 / 0	4
	7483	P519D A and B and Interesting Substrings data structures dp two pointers *1800	0 / 0	6
	7482	P519E A and B and Lecture Rooms binary search data structures dfs and similar dp trees *2100	0 / 0	7
	7481	P520A Pangram implementation strings *800	0 / 0	3
	7480	P520B Two Buttons dfs and similar graphs greedy implementation math shortest paths *1400	1 / 1	4
	7479	P520C DNA Alignment math strings *1500	0 / 0	5
	7478	P520D Cubes games greedy implementation *2100	0 / 0	7
	7477	P520E Pluses everywhere combinatorics dp math number theory *2200	0 / 0	8
	7476	P521D Shop greedy *2800	0 / 0	10
	7475	P521E Cycling City dfs and similar graphs *3100	0 / 0	10
	7474	P522A Reposts special problem dfs and similar dp graphs trees 1200	0 / 0	4
	7473	P522B Photo to Remember special problem data structures dp implementation 1100	0 / 0	3
	7472	P522C Chicken or Fish? greedy *2100	0 / 0	7
	7471	P522D Closest Equals special problem data structures 2000	0 / 0	7
	7470	P523A Rotate, Flip and Zoom special problem implementation 1200	0 / 0	4
	7469	P523B Mean Requests special problem implementation 1500	0 / 0	5
	7468	P523C Name Quest special problem greedy 1400	0 / 0	4
	7467	P523D Statistics of Recompressing Videos special problem data structures implementation 1600	0 / 0	5
	7466	P524C The Art of Dealing with ATM binary search sortings *1900	0 / 0	6
	7465	P524D Social Network greedy two pointers *2100	0 / 0	7
	7464	P524E Rooks and Rectangles data structures sortings *2400	0 / 0	9
	7463	P524F And Yet Another Bracket Sequence data structures greedy hashing string suffix structures strings *2700	0 / 0	10
	7462	P525A Vitaliy and Pie greedy hashing strings *1100	0 / 0	3
	7461	P525B Pasha and String constructive algorithms greedy math strings *1400	0 / 0	4
	7460	P525C Ilya and Sticks greedy math sortings *1600	0 / 0	5
	7459	P525D Arthur and Walls constructive algorithms data structures graphs greedy shortest paths *2400	0 / 0	9
	7458	P525E Anya and Cubes binary search bitmasks brute force dp math meet-in-the-middle *2100	0 / 0	7
	7457	P526A King of Thieves brute force implementation *1300	0 / 0	4
	7456	P526B Om Nom and Dark Park dfs and similar greedy implementation *1400	0 / 0	4
	7455	P526C Om Nom and Candies brute force greedy math *2000	0 / 0	7
	7454	P526D Om Nom and Necklace hashing string suffix structures strings *2200	0 / 0	8
	7453	P526E Transmitting Levels dp implementation *2400	0 / 0	9
	7452	P526F Pudding Monsters data structures divide and conquer *3000	0 / 0	10
	7451	P526G Spiders Evil Plan greedy trees *3300	0 / 0	10
	7450	P527A Playing with Paper implementation math *1100	0 / 0	3
	7449	P527B Error Correct System greedy *1500	0 / 0	5
	7448	P527C Glass Carving binary search data structures implementation *1500	0 / 0	5
	7447	P527D Clique Problem data structures dp greedy implementation sortings *1800	0 / 0	6
	7446	P527E Data Center Drama dfs and similar graphs *2600	0 / 0	10
	7445	P528D Fuzzy Search bitmasks brute force fft *2500	1 / 1	9
	7444	P528E __NO_TITLE__	0 / 0	(None)
	7442	P529B Group Photo 2 (online mirror version) brute force greedy sortings *1900	0 / 0	6
	7441	P530A Quadratic equation special problem 1500	0 / 0	5
	7438	P530B String inside out special problem 1600	0 / 0	5
	7437	P530C Diophantine equation special problem 1500	0 / 0	5
	7434	P530D Set subtraction special problem 1600	0 / 0	5
	7433	P530E Sum and product special problem 1700	0 / 0	5
	7431	P530F Jumping frogs special problem 2100	0 / 0	7
	7429	P530G Levenshtein distance special problem 2100	0 / 0	7
	7426	P530H Points in triangle special problem geometry 2100	0 / 0	7
	7425	P530I Different variables special problem 2500	0 / 0	9
	7422	P533A Berland Miners binary search data structures dfs and similar greedy trees *3000	0 / 0	10
	7420	P533B Work Group dfs and similar dp graphs strings trees *2000	0 / 0	7
	7419	P533C Board Game games greedy implementation math *1700	0 / 0	5
	7418	P533D Landmarks data structures dp *3000	0 / 0	10
	7417	P533E Correcting Mistakes constructive algorithms dp greedy hashing strings two pointers *1800	0 / 0	6
	7416	P533F Encoding hashing string suffix structures strings *2400	0 / 0	9
	7415	P534A Exam constructive algorithms implementation math *1100	0 / 0	3
	7414	P534B Covered Path dp greedy math *1400	0 / 0	4
	7413	P534C Polycarpus' Dice math *1600	0 / 0	5
	7412	P534D Handshakes binary search constructive algorithms data structures greedy *1900	0 / 0	6
	7411	P534E Berland Local Positioning System constructive algorithms greedy hashing implementation *2400	0 / 0	9
	7410	P534F Simplified Nonogram bitmasks dp hashing meet-in-the-middle *2400	0 / 0	9
	7409	P535A Tavas and Nafas brute force implementation *1000	0 / 0	3
	7408	P535B Tavas and SaDDas bitmasks brute force combinatorics implementation *1100	0 / 0	3
	7407	P535C Tavas and Karafs binary search greedy math *1900	0 / 0	6
	7406	P535D Tavas and Malekas greedy hashing string suffix structures strings *1900	0 / 0	6
	7405	P535E Tavas and Pashmaks geometry math *2600	0 / 0	10
	7404	P536D Tavas in Kansas dp games *2900	0 / 0	10
	7403	P536E Tavas on the Path data structures divide and conquer trees *3100	0 / 0	10
	7402	P538A Cutting Banner brute force implementation *1400	0 / 0	4
	7401	P538B Quasi Binary constructive algorithms dp greedy implementation *1400	0 / 0	4
	7400	P538C Tourist's Notes binary search brute force greedy implementation math *1600	0 / 0	5
	7399	P538D Weird Chess brute force constructive algorithms implementation *1800	0 / 0	6
	7398	P538E Demiurges Play Again dfs and similar dp math trees *2200	0 / 0	8

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