60. 1978(소수찾기)

let input = require("fs").readFileSync("ex.txt").toString().trim().split("\n");

let N = parseInt(input[0]);
let tmp = input[1].split(" ").map(Number);
let result = 0;

for (let i = 0; i < N; i++) {
  cnt = 0;
  let T = tmp[i];

  if (T == 1) {
    continue;
  }

  for (let j = 1; j <= T; j++) {
    if (T % j == 0) {
      cnt++;
    }
  }

  if (cnt == 2) {
    result++;
  }
}

console.log(result);