import Foundation

let contents = try! String(contentsOfFile: "input.txt")
var lines = [Int]()
for l in contents.split(separator:"\n") {
	lines.append(Int(l)!)
}

var increases = 0
for i in 1..<lines.count {
	if lines[i] > lines[i-1] {
		increases += 1
	}
}
print(increases)