CREATE TABLE dorm (dormid VARCHAR(255), gender VARCHAR(255)); CREATE TABLE lives_in (stuid VARCHAR(255), dormid VARCHAR(255)); CREATE TABLE student (stuid VARCHAR(255))
Find the total number of students living in the male dorm (with gender M).
    
SQL: SELECT COUNT(*) FROM student AS T1 JOIN lives_in AS T2 ON T1.stuid = T2.stuid JOIN dorm AS T3 ON T3.dormid = T2.dormid WHERE T3.gender = 'M'