<garvit244>85_1.py
def largestRectangleArea( heights):
    if not heights:
        return 0
    
    stack = []
    result, index = 0, 0
    
    while index < len(heights):
        if not stack or heights[index] >= heights[stack[-1]]:
            stack.append(index)
            index += 1
        else:
            curr = stack.pop()
            if not stack:
                area = heights[curr]*index
            else:
                area = heights[curr] * (index-stack[-1]-1)
            result = max(result, area)
    
    while stack:
        curr = stack.pop()
        if not stack:
            area = heights[curr]*index
        else:
            area = heights[curr] * (index-stack[-1]-1)
        result = max(result, area)
    return result
def sample_funcname ( var_0 ) :
    if not var_0 :
        return 0
    var_2 = [ ]
    var_3 , var_4 = 0 , 0
    while var_4 < len ( var_0 ) :
        if not var_2 or var_0 [ var_4 ] >= var_0 [ var_2 [ - 1 ] ] :
            var_2.append ( var_4 )
            var_4 += 1
        else :
            var_9 = var_2.pop ( )
            if not var_2 :
                var_10 = var_0 [ var_9 ] * var_4
            else :
                var_10 = var_0 [ var_9 ] * ( var_4 - var_2 [ - 1 ] - 1 )
            var_3 = max ( var_3 , var_10 )
    while var_2 :
        var_9 = var_2.pop ( )
        if not var_2 :
            var_10 = var_0 [ var_9 ] * var_4
        else :
            var_10 = var_0 [ var_9 ] * ( var_4 - var_2 [ - 1 ] - 1 )
        var_3 = max ( var_3 , var_10 )
    return var_3
