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function solution(s){
var braceCount = 0;
var answer = true;
s.split("").forEach(b => {
if (b === "(") {
braceCount += 1;
} else {
braceCount -= 1;
}
if (braceCount < 0) answer = false;
});
if (braceCount > 0) {
answer = false
}
return answer;
}