a = [int(x) for x in open('17var10.txt')] cnt = 0 min_sum = float('inf') # бесконечность for i in range(len(a) - 1): x, y = a[i], a[i+1] if abs(x) % 10 == 7 and abs(y) % 10 == 7: cnt += 1 min_sum = min(min_sum, abs(x - y)) print(cnt, min_sum)