import sequtils proc getchar_unlocked():char {. importc:"getchar_unlocked",header: "" .} proc scan(): int = var minus = false while true: var k = getchar_unlocked() if k == '-' : minus = true elif k < '0' or k > '9': break else: result = 10 * result + k.ord - '0'.ord if minus: result *= -1 template times*(n:int,body) = (for _ in 0.. 777 : sum -= A[x] x += 1 if sum == 777: quit "YES",0 echo "NO"