Codeforces

Codeforces

Solutions to some of the questions on the Codeforces website.

Solutions

Problem Solution	Problem Statement	Difficulty
1A.cpp	Theatre Square	1000
4A.cpp	Watermelon	800
4C.cpp	Registration system	1300
25A.cpp	IQ test	1300
32B.cpp	Borze	800
34B.cpp	Sale	900
41A.cpp	Translation	800
50A.cpp	Domino piling	800
58A.cpp	Chat room	1000
59A.cpp	Word	800
61A.cpp	Ultra-Fast Mathematician	800
69A.cpp	Young Physicist	1000
71A.cpp	Way Too Long Words	800
96A.cpp	Football	900
110A.cpp	Nearly Lucky Number	800
112A.cpp	Petya and Strings	800
116A.cpp	Tram	800
118A.cpp	String Task	1000
122A.cpp	Lucky Division	1000
131A.cpp	cAPS lOCK	1000
133A.cpp	HQ9+	900
136A.cpp	Presents	800
141A.cpp	Amusing Joke	800
144A.cpp	Arrival of the General	800
148A.cpp	Insomnia cure	800
158A.cpp	Next Round	800
158B.cpp	Taxi	1100
160A.cpp	Twins	900
200B.cpp	Drinks	800
208A.cpp	Dubstep	900
228A.cpp	Is your horseshoe on the other hoof?	800
230A.cpp	Dragons	1000
230B.cpp	T-primes	1300
231A.cpp	Team	800
236A.cpp	Boy or Girl	800
263A.cpp	Beautiful Matrix	800
266A.cpp	Stones on the Table	800
266B.cpp	Queue at the School	800
268A.cpp	Games	800
271A.cpp	Beautiful Year	800
279B.cpp	Books	1400
281A.cpp	Word Capitalization	800
282A.cpp	Bit++	800
318A.cpp	Even Odds	900
337A.cpp	Puzzles	900
339A.cpp	Helpful Maths	800
339B.cpp	Xenia and Ringroad	1000
344A.cpp	Magnets	800
363B.cpp	Fence	1100
368B.cpp	Sereja and Suffixes	1100
405A.cpp	Gravity Flip	900
443A.cpp	Anton and Letters	800
451A.cpp	Game With Sticks	900
451B.cpp	Sort the Array	1300
459B.cpp	Pashmak and Flowers	1300
466A.cpp	Cheap Travel	1200
466C.cpp	Number of Ways	1700
467A.cpp	George and Accommodation	800
469A.cpp	I Wanna Be the Guy	800
479A.cpp	Expression	1000
486A.cpp	Calculating Function	800
489B.cpp	BerSU Ball	1200
489C.cpp	Given Length and Sum of Digits...	1400
492B.cpp	Vanya and Lanterns	1200
514A.cpp	Chewbaсca and Number	1200
514B.cpp	Han Solo and Lazer Gun	1400
519B.cpp	A and B and Compilation Errors	1100
520A.cpp	Pangram	800
520B.cpp	Two Buttons	1400
546A.cpp	Soldier and Bananas	800
580A.cpp	Kefa and First Steps	900
580C.cpp	Kefa and Park	1500
617A.cpp	Elephant	800
656F.cpp	Ace It!	1900
677A.cpp	Vanya and Fence	800
705A.cpp	Hulk	800
734A.cpp	Anton and Danik	800
785A.cpp	Anton and Polyhedrons	800
791A.cpp	Bear and Big Brother	800
977A.cpp	Wrong Subtraction	800
996A.cpp	Hit the Lottery	800
996B.cpp	World Cup	1300
1030A.cpp	In Search of an Easy Problem	800
1056A.cpp	Determine Line	800
1056B.cpp	Divide Candies	1600
1061A.cpp	Coins	800
1061B.cpp	Views Matter	1400
1080A.cpp	Petya and Origami	800
1080B.cpp	Margarite and the best present	900
1080C.cpp	Masha and two friends	1500
1082A.cpp	Vasya and Book	1200
1082B.cpp	Vova and Trophies	1600
1104A.cpp	Splitting into digits	800
1104B.cpp	Game with string	1200
1106A.cpp	Lunar New Year and Cross Counting	800
1106B.cpp	Lunar New Year and Food Ordering	1500
1106C.cpp	Lunar New Year and Number Division	900
1106D.cpp	Lunar New Year and a Wander	1500
1108A.cpp	Two distinct points	800
1108B.cpp	Divisors of Two Integers	1100
1108C.cpp	Nice Garland	1300
1108D.cpp	Diverse Garland	1400
1114A.cpp	Got Any Grapes?	800
1114B.cpp	Yet Another Array Partitioning Task	1500
1201B.cpp	Zero Array	1500
1234A.cpp	Equalize Prices Again	800
1234B1.cpp	Social Network (easy version)	1000
1234B2.cpp	Social Network (hard version)	1300
1234C.cpp	Pipes	1500
1234D.cpp	Distinct Characters Queries	1600
1265A.cpp	Beautiful String	1000
1265B.cpp	Beautiful Numbers	1300
1265C.cpp	Beautiful Regional Contest	1500
1265D.cpp	Beautiful Sequence	1900
1269A.cpp	Equation	800
1269B.cpp	Modulo Equality	1500
1269C.cpp	Long Beautiful Integer	1700
1269D.cpp	Domino for Young	2000
1270A.cpp	Card Game	800
1270B.cpp	Interesting Subarray	1200
1270C.cpp	Make Good	1400
1271A.cpp	Suits	800
1271B.cpp	Blocks	1300
1271C.cpp	Shawarma Tent	1300
1271D.cpp	Portals	2100
1271E.cpp	Common Number	2100
1272A.cpp	Three Friends	900
1272B.cpp	Snow Walking Robot	1200
1272C.cpp	Yet Another Broken Keyboard	1200
1272D.cpp	Remove One Element	1500
1277A.cpp	Happy Birthday, Polycarp!	1000
1277B.cpp	Make Them Odd	1200
1277C.cpp	As Simple as One and Two	1400
1278A.cpp	Shuffle Hashing	1000
1278B.cpp	A and B	1500
1278C.cpp	Berry Jam	1700
1278D.cpp	Segment Tree	2100
1281A.cpp	Suffix Three	800
1281B.cpp	Azamon Web Services	1600
1281C.cpp	Cut and Paste	1700
1281D.cpp	Beingawesomeism	1800
1282A.cpp	Temporarily unavailable	900
1282B1.cpp	K for the Price of One (Easy Version)	1400
1282B2.cpp	K for the Price of One (Hard Version)	1600
1282C.cpp	Petya and Exam	1800
1283A.cpp	Minutes Before the New Year	800
1283B.cpp	Candies Division	900
1283C.cpp	Friends and Gifts	1500
1283D.cpp	Christmas Trees	1800
1283E.cpp	New Year Parties	1800
1284A.cpp	New Year and Naming	800
1284B.cpp	New Year and Ascent Sequence	1400
1284C.cpp	New Year and Permutation	1600
1285A.cpp	Mezo Playing Zoma	800
1285B.cpp	Just Eat It!	1300
1285C.cpp	Fadi and LCM	1400
1285D.cpp	Dr. Evil Underscores	1900
1287A.cpp	Angry Students	800
1287B.cpp	Hyperset	1500
1287C.cpp	Garland	1800
1287D.cpp	Numbers on Tree	1800
1296A.cpp	Array with Odd Sum	800
1296B.cpp	Food Buying	900
1296C.cpp	Yet Another Walking Robot	1500
1296D.cpp	Fight with Monsters	1500
1296E1.cpp	String Coloring (easy version)	1800
1296E2.cpp	String Coloring (hard version)	2000
1328A.cpp	Divisibility Problem	800
1328B.cpp	K-th Beautiful String	1300
1328C.cpp	Ternary XOR	1200
1328D.cpp	Carousel	1800
1328E.cpp	Tree Queries	1900
1330A.cpp	Dreamoon and Ranking Collection	900
1330B.cpp	Dreamoon Likes Permutations	1400
1330C.cpp	Dreamoon Likes Coloring	1800
1330D.cpp	Dreamoon Likes Sequences	1700
1331A.cpp	Is it rated?
1331B.cpp	Limericks
1331C.cpp	...And after happily lived ever they
1331D.cpp	Again?
1333A.cpp	Little Artem	1000
1333B.cpp	Kind Anton	1100
1333C.cpp	Eugene and an array	1700
1333D.cpp	Challenges in school №41	2100
1333E.cpp	Road to 1600	2400
1333F.cpp	Kate and imperfection	2200
1334A.cpp	Level Statistics	1200
1334B.cpp	Middle Class	1100
1334C.cpp	Circle of Monsters	1600
1335A.cpp	Candies and Two Sisters	800
1335B.cpp	Construct the String	900
1335C.cpp	Two Teams Composing	1100
1335D.cpp	Anti-Sudoku	1300
1335E1.cpp	Three Blocks Palindrome (easy version)	1700
1335E2.cpp	Three Blocks Palindrome (hard version)	1800
1335F.cpp	Robots on a Grid	2200
1339A.cpp	Filling Diamonds	900
1339B.cpp	Sorted Adjacent Differences	1200
1339C.cpp	Powered Addition	1500
1339D.cpp	Edge Weight Assignment	1800
1343C.cpp	Alternating Subsequence	1200
1352C.cpp	K-th Not Divisible by n	1200
1353C.cpp	Board Moves	1000
1360B.cpp	Honest Coach	800
1365B.cpp	Trouble Sort	1300
1368A.cpp	C+=	800
1370D.cpp	Odd-Even Subsequence	2000
1373A.cpp	Donut Shops	1000
1373B.cpp	01 Game	900
1373C.cpp	Pluses and Minuses	1300
1373D.cpp	Maximum Sum on Even Positions	1600
1373E.cpp	Sum of Digits	2200
1374A.cpp	Required Remainder	800
1374B.cpp	Multiply by 2, divide by 6	900
1374B.cpp	Multiply by 2, divide by 6	900
1374C.cpp	Move Brackets	1000
1374D.cpp	Zero Remainder Array	1400
1374E1.cpp	Reading Books (easy version)	1600
1385B.cpp	Restore the Permutation by Merger	800
1397A.cpp	Juggling Letters	800
1397B.cpp	Power Sequence	1500
1397C.cpp	Multiples of Length	1600
1397D.cpp	Stoned Game	1800
1398C.cpp	Good Subarrays	1600
1399A.cpp	Remove Smallest	800
1399B.cpp	Gifts Fixing	800
1399C.cpp	Boats Competition
1399D.cpp	Binary String To Subsequences
1399E1.cpp	Weights Division (easy version)
1399E2.cpp	Weights Division (hard version)
1472B.cpp	Fair Division	800
1475B.cpp	New Year's Number	900
1509A.cpp	Average Height	800
1509B.cpp	TMT Document	1100
1512A.cpp	Spy Detected!	800
1512B.cpp	Almost Rectangle	800
1512C.cpp	A-B Palindrome	1200
1512D.cpp	Corrupted Array	1200
1512E.cpp	Permutation by Sum	1600
1512F.cpp	Education	1900
1512G.cpp	Short Task	1700
1520B.cpp	Ordinary Numbers	800
1527A.cpp	And Then There Were K	800
1527B1.cpp	Palindrome Game (easy version)	1200
1527B2.cpp	Palindrome Game (hard version)	1900
1527C.cpp	Sequence Pair Weight	1600
1538B.cpp	Friends and Candies	800