CodeForces 556A Case of the Zeros and Ones 【贪心 字符串】
A.CaseoftheZerosandOnestimelimitpertest1secondmemorylimitpertest256megabytesinputstandardinputoutputstandardoutputAndrewidtheAndroidisagalaxy-famousdetective.Inhisfreetimehelikestothinkaboutstringscon