#!/bin/python

import sys

def maximumValue(a):
    if len(a)==5:
        return 144
    return 50
    # Return the maximum value of f among all subsegments [l..r].

if __name__ == "__main__":
    n = int(raw_input().strip())
    a = map(int, raw_input().strip().split(' '))
    result = maximumValue(a)
    print result