EuRusik,
var temp = [17, -9, -20, -34, -2, 32, -14, 40, -49, 45, -1, -40, -23, 14, -23, -43, 5, 2, -45, 40, -10, 25, -31, -14, -43, 33, 1, -1, 1, 24, 13, -46, -34, -17, 10, -28, -19, -5, -38, 0, -34, 15, 21, -46, -27, 41, 15, 19, -9, 27, -7, -3, -16, 36, 35, 17, -38, 41, -5, 8, -7, -37, 17, -33, -21, 7, 1, 33, -13, 27, -41, 2, -43, 14, 26, 7, -11, 29, 43, -14, -1, 36, 19, -41, -38, -10, 16, -2, -21, -36];
var len = temp.filter(function(a,i) {
return a > 0 && temp[++i] && temp[i] < 0
}).length;
alert(len)