function Main(input) {

    var data = input.split("\n")

    var first_line  = data[0]
    var second_line = data[1].split(" ")
    var third_line  = data[2]

    var getbackMoneyList = []
    var totalVote = 0
    var resultArr = []

    for (let vote of second_line) {
  		totalVote = totalVote + vote / 10
		}

		for (let vote of second_line) {
			if (totalVote >= vote) {
				getbackMoneyList.push(30)
  		} else {
  			getbackMoneyList.push(0)
  		}
		}

    function getNum() {
    	var rs = 0
    	for (let vote of getbackMoneyList) {
    		rs = rs + vote
    	}
    	return rs
    }

    var c = getNum()
    console.log(c + " ");
}

// Don't edit this line!
Main(require("fs").readFileSync("/dev/stdin", "utf8"));