Lehmät

const input = require("fs").readFileSync(0, "utf8").trim().split("\n").map(l => l.trim());

input.shift();

let count = 0;

for (const line of input) {
  let e = 0;
  for (const char of line) {
    if (char === "*") e++;
    if (e === 1 && char === "@") count++;
  }
}

console.log(count.toString());

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 1, 2

Verdict: ACCEPTED

Test 3

Group: 1, 2

Verdict: ACCEPTED

Test 4

Group: 1, 2

Verdict: ACCEPTED

Test 5

Group: 1, 2

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED