you give integer array card length 4 you card contain number range 1 9 you arrange number card mathematical expression operator parenthese value 24you restrict follow rulesThe division operator represent real division integer divisionfor example 4 1 2 3 4 1 3 12every operation number in particular use unary operatorFor example card 1 1 1 1 expression 1 1 1 1 allowedyou concatenate number togetherfor example card 1 2 1 2 expression 12 12 validreturn true expression evaluate 24 false Example 1input card 4187output trueexplanation 84 71 24example 2input card 1212output false Constraintscardslength 41 cardsi 9