循环重叠问题

[计] circulated overlapping problem

xún huán chóng dié wèn tí ㄒㄩㄣˊ ㄏㄨㄢˊ ㄔㄨㄥˊ ㄉㄧㄝˊ ㄨㄣˋ ㄊㄧˊ