C++の練習を兼ねて, AtCoder Regular Contest 053 の 問題A (ドミノ色塗り) ~ 問題B (回文分割) を解いてみた.
■感想.
1. 久しぶりに, 躓かないで, 回答出来たので良かったと思う.
2. 時間を見つけて, 引き続き, 過去問を振り返っていきたいと思う.
本家のサイトARC 053 解説をご覧下さい.
■C++版プログラム(問題A/AC版).
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#include <bits/stdc++.h> using namespace std; int main(){ // 1. 入力情報. int H, W; scanf("%d %d", &H, &W); // 2. 2マスを黒く塗る方法の場合の数は? int ans = (H - 1) * W + H * (W - 1); // 3. 出力. printf("%d\n", ans); return 0; } |
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[入力例] 2 3 [出力例] 7 ※AtCoderのテストケースより [入力例] 4 1 [出力例] 3 ※AtCoderのテストケースより [入力例] 1 1 [出力例] 0 ※AtCoderのテストケースより [入力例] 89 97 [出力例] 17080 [入力例] 100 100 [出力例] 19800 |
■C++版プログラム(問題B/AC版).
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#include <bits/stdc++.h> using namespace std; #define repex(i, a, b, c) for(int i = a; i < b; i += c) #define repx(i, a, b) repex(i, a, b, 1) #define rep(i, n) repx(i, 0, n) #define repr(i, a, b) for(int i = a; i >= b; i--) int a[26]; int main(){ // 1. 入力情報. char c[101010]; scanf("%s", c); int l = strlen(c); // 2. 出現回数をカウント. rep(i, l) a[c[i] - 'a']++; // 3. 奇数回出現したものの英小文字の種類は? int odd = 0; rep(i, 26) if(a[i] & 1) odd++; // 4. なるべく差分を小さくする. // odd が 0でない場合は, (l - odd)個 の 英小文字 を 2個ずつ配分. int ans = l; if(odd) ans = 1 + (l - odd) / (2 * odd) * 2; // 5. 出力. printf("%d\n", ans); return 0; } |
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[入力例] rokovoko [出力例] 3 ※AtCoderのテストケースより [入力例] tomtom [出力例] 6 ※AtCoderのテストケースより [入力例] vwxyz [出力例] 1 ※AtCoderのテストケースより [入力例] succeeded [出力例] 3 ※AtCoderのテストケースより [入力例] qvvofmfdouuyhtwmedxhlpbdzeiokaeigcmbnkwpgbgdkhjvygongbwxwvqgznzdkmsgfsefokrgilptfrlijckrdfxyxxdekyxm [出力例] 7 [入力例] nlylgyzywvahxcmsgzlbcbfdaluejurktxyzmytiyxswaxsypyrjomnbnpfmslblpsvdnhvfaxxnqxinzrsybjqqirwxwbyywzlzklhprontclrhlabozislfpluaxxfgagqbhnevodxpwqzcuxobfobwrxqknuudowfoqjdufrwfpzfptywotqwnktutprndeqxdjwuyvcpwfopjglrayvhrcjcvohlyuenqellzfpzurkterrjnztoewhfiryljxgzdnylqbespfzygfleaipzluewfbqvffvnarkjxhyakfkmlnlzwbdsovyrdzzxygkehmoutawaekzgrwzjcqyuhcqbcflwccrahwnxlglmvfxesxhzinktecvgtmquqxqzuomwoilejizusbxalxpwevdbdyszgfstdsjorounsiqxppggvkugrwxtlqsvsckilflbllboyvnczdixpptjjwjoecnuhzcdgeearshtxmytlzasfigyiqxhktadurisazuuirhcryjkbnyhpzkleigcuykmiezhsgrokdvuohtakfofedwynjzlrestwisshqjpxnyppuibwusuakdkynejzqnhuxhjywxaceglopyuicwcevxnwtzxccnhijpjruteuwmeidopjyfxeandolzqwxnpfcihucuqgxqebnkmjdrdjnvtuwqlnlzshwmszqdijxdlisbinqbtxcjhbaxzdiyvybloycvkdmtwwwmimxkwcsssfzdqlqbezinnubnwebdscjctfdjqnzodbklrgmkufxinpuirpmcjledlgrzbfjanxyqvaavealltqicoyjephmjhomcrgoufulpyngxuzslplecoqisjtcelnydapobvjrxdzxsoskrzmebwihdbfzfuqsgfsqaecjsiqajdrmdsojprdchesehuxworxcvqrlsbxkltffdgvtkzuugknbrxdevtoyvkauiypufvflgzmadtkpcwyvgdrskvurccdpfbpnprkardykoteztrgukquwlifaupxjusgstvsdcbghvtzvhnmrrtsqmqbzdahwajqsnccbsqubozvwrxzbeqnfvtvbwxjgjngeculqqeruopbgcqjaaqjcqqzusvcuidvprijkrrfuenilqrcnrpdpzcdbemczaijcjtyogxhkgjtutynbsvfevzknirkcmitbdttjbnlpjwvsdiacrdlnmhxxxalckhyycxwyvntrchakugqobevmfhkstvysxitxjwshmudebdnppzcrlrgvlengjiccmcybudadxzpnhrwdmrlbtnrsibnydtjgrziqctjnsgmhiolvvgjelmlyirhyzybsmcnlhtefjsiavvklskzzgauuuaaonjhzjstoxxarntynkfypxhwspqpqerbullkaztzfxdziikrevpwcslnxyqmldtygzgoaslpnrfrieroldlzipyrybemesofkmlppwnggigmhtowszzipthoxclnjtnezggamloqiexilmlybkwqnvnecuiyeaalmuwlqteazpgoidzzjxaiwuyzngkevnbfgatnksvivtmswusbjafqslxghrltpjhsjupykrklvopqmyxpjkcsfdhqvaqssezriwjpmieymwtzeuikltlodpxfaewsitxbyxopiynylkhymaelhdpvcxrmrojacclteashvatmfykdsxljgotpdblmaznpgedsrslyojijjlbnlddwykgbfjzymwmpjntkfmpmohpdgvpqcligbncuwlfpizqdffpntvxzjzpvvpwqmlnhgtlmjxcsildsnrlgduhilnngqtgropnkcoikjckcqjitbtojdetemgxwcbmjoiptabneuhyxaiixlohtxyllgowvztoosvrpduqvqywuepbbudhpzayjhrmtprpcgaukzjemtbvytalubunsboxrbkbkxjjwbusxaexxrsalydy [出力例] 165 [入力例] hluchtttjbapsolzlyukdyjbbxaxtutwpwasvxxstymmbmfsaezsynmyzkyhbycnukjyubajhhkuoecryfslpvebweknmymcogncdhlstnikgmnsckrszzwsqwxatsqzpaatatdvfnfyjttywvvucezinawkeelstqyqabnvqwpugpzjzjrjxqpoqihlnvhodfvqwznqgbloexodbxcubuvbertxvhzaoehkpvksfmzzujwyvzkmxonabeijfxxpejnisevlnoinqogjejfnrvgzqbgewhwkjjocwfjglcezekdkdghmtoosomspdarmtdxetfcvolgnaxgbgzwjsnfzjizxdnrwtgymembkfbkrwzkpwsyzxbpqycwfdrndzuklpwnqszzaogwgfvhvbcwfevgzoubemhpqpvjqvgxjyjpequmjfdjkufjtfnnnedyievohwtejeqkusmtdpkswrimktbrpgpraogkypmdzkzxamtzespdmhfoebatfspcmkiysechpeiaxhpxiqevwhbudzpagjzjoxvtxwnydtlqqkgafqdihtlbkbwjeybhxqygoezzgwkvhrdtdmireotftrsrijwzvxralyzruiyrvnyzjxrcahjfoootkrklvaubvkqnpzxdlptotcphiyupwpeicyrxiuopqiwmbcfsxvtvkglkwwnzdhgxwhelrttbwmwpetayzfhmwwjgcaplkubvfclwpvqybbszruvofnnzdzeuasvavllkcyvdvxhufrnpyzwshmyedrlxtqrleluzoygvjbwwgzswjbqhzcntkldyfxrahqjnezmvcdlyztoymzwuwvcfokguemfkvajbxitbblvxreyuidattbdmzikxaqxcdqvqcxuzxhulzfpjujndarbhhkmaxduqjowdzcektycpiocriruarxudfanfvrrxtipwhjqxpjnqfvhjrvulgkikuqcrumldkyusxerrplbkmmvgljdsuqcjetflfkcirkzuuznxjjbsgmrhninqubwnedowyxihsoreefvitjagcvzscasqbbvkixhnujvqabqunnwkqkrlepfmiymzozmhshjslmypcuuydwpfudlozikhdjtsdiysshknkpjggkfduwshneuegrpkfwfcbioyezkcbgrjsjyttzvjornbpmadgkqjrgmrlrnzbfiqecvrryuhbemstfehstgssijrfgcixpzrseeyunxvmcvnbtihtuteezvmxsuzefqacszmxbywoapbrrtwbtgfbtdpjcpemakpivysukzqzenmqkqqchsskhmbordyrosipsukhhfyzxublfvcehtlvktiqisgonbipmsugorlcivkzxqxnmloeogmobojlsxogmtnyxrbyyrlmxnbjwiangbwhovvdermnltrlfqbqskeowywrqiahumcadbdjvnggimahpgsmtfdjcamoiifbvwxpwzvtnqxzvbtejoovttsnumsakctrerfkmjrmaigoxxecjmkaqyfkoeorcbpjgzwaubgoruaxguyjzdfgqiixjwpaibgywsnhfktdmzrxkihlgiaoqaqupabirdjgfemctvgxnpyqjrdyhkfzigsuepryeewqqapiynzdsyzradfazjqshskoqprjvetbyethjhvlrupfjkniqpiuotylttcvqepannjafspsyrozyffnvcrdrkzktlvkllpusdbzuoibbotuegdckydtmapcigcxptlenvqpwznyzynbbpobwvsutgnryilnnxrdsffzeqouudfbumwntzflbzwenpmtifseiwdqfbftblnotvzsuphchoharqfqeuwezzdijukudcpzhraqflbcpulcmcpatrtxfhtrymgaeiuiornfmavkjtwxgxlrvookxdjjmswklzvgglpcolflvidyyrauvvpocsmifbjsbhaxqlszpsggzkemcklggkryquyikntuoxlqmebjusifezshloeuvbasdjckswplauuvirlgzfcnkmrsqltaamztztpgijhyfiabkcemenipwzjkxbdbeltjgmyegjszjpczazypdnnhlnohwirtqcikfxqifddyytdngpvpunbtikgcvzscgimykwvmzicvmsythrrxksppzvdvnsloxuyjvymrvmgbeiwiqqxjnlabdzwaqwcirzeynjktvoqnfxvkwwrjafctlsancwxycushuydbmsdwrykggbjtddmxgwonkzikuwqrofebmnjgchplbdodjfzvitsagqugmijallbbzlfoxhublwugfusuumtttemnswjsaxsdkpidhgvvvvqnubpsidgwnogvdwjcrzmhlntgjpxcakuajfpzidvxoydzssstvdpdynqeikvbmvfvyieepiwebnqugcghynivsgylzibtvvclcmptmlsrmsanmpmtnyghvtqhowiaoekcprsqsrojaanuwabbahhkeyxwvnqefdpvwtfrxcsxmxvmsjcffqnejtkdbndgcngewloxnicwlgkvxggauvgxratpfqdngymzedidnnzfopeloeisrtkqhmilusjoyicovxjyktnhdacmazuddzeubfsvbsxzunetaikgjtzkghnejsxthwwcefgwuumhhhygcwrbduuxoawrkvrqhffmduyrgxzaqmeudqvgjgegwrcijegawjvdnqbvtqmfgfpxlzszsghokjzxpqnlxjsklarqfeywzwmkbubdhxhqgdbyyqxzqubwgppyvlykumqvhxzulbzzzjzlarijphojzfzulzaowaqtalvbdmxkvgrmycuiyfxpdocuvjolgonqoekpctnuavgtcxflascuagydkootnyzafuvzscxmhwmuembrhxvrnfpoabthizmnyoqynpajpopnojdlauxernyxdcfajswjusvrhbofyymjnbvnhhgbngyg [出力例] 213 |
■参照サイト
AtCoder Regular Contest 053