학생 배열에 저장하고 K의 몫만큼 방 할당. 나머지있으면 하나더 할당 import sys input = sys.stdin.readline N, K = map(int, input().split()) students = [[0,0] for _ in range(6)] for _ in range(N): S, Y = map(int, input().split()) students[Y-1][S] += 1 answer = 0 for grade in students: for sex in grade: answer += sex//K if sex%K: answer += 1 print(answer)