2018 여름방학 ACM 합숙훈련 CodeForces - 978 C. Letters The rooms in ii-th dormitory are numbered from 11 to aiai. If the number 77 is written on an envelope, it means that the letter should be delivered to the room number 44 of the second dormitory. For each of mm letters by... 2018 여름방학 ACM 합숙훈련시합 문제풀이
CodeForces - 978 C. Letters The rooms in ii-th dormitory are numbered from 11 to aiai. If the number 77 is written on an envelope, it means that the letter should be delivered to the room number 44 of the second dormitory. For each of mm letters by... 2018 여름방학 ACM 합숙훈련시합 문제풀이