BÀI 1

Nộp bài

Time limit: 1.0 / Memory limit: 256M

Point: 100

BÀI 2

Nộp bài

Time limit: 1.0 / Memory limit: 256M

Point: 100

BÀI 3

Nộp bài

Time limit: 1.0 / Memory limit: 256M

Point: 100

BÀI 4

Nộp bài

Time limit: 1.0 / Memory limit: 256M

Point: 100