05. Game Of Intervals

num = int(input())
result = 0
num0To10 = 0
num10To20 = 0
num20To30 = 0
num30To40 = 0
num40To50 = 0
invalid_num = 0

for i in range(num):
    number = float(input())
    if 0 <= number < 10:
        result += number * 0.2
        num0To10 += 1
    elif 10 <= number < 20:
        result += number * 0.3
        num10To20 += 1
    elif 20 <= number < 30:
        result += number * 0.4
        num20To30 += 1
    elif 30 <= number < 40:
        result += 50
        num30To40 += 1
    elif 40 <= number <= 50:
        result += 100
        num40To50 += 1
    else:
        result /= 2
        invalid_num += 1

print(f'{result:.2f}')
print(f'From 0 to 9: {num0To10 / num * 100:.2f}%')
print(f'From 10 to 19: {num10To20 / num * 100:.2f}%')
print(f'From 20 to 29: {num20To30 / num * 100:.2f}%')
print(f'From 30 to 39: {num30To40 / num * 100:.2f}%')
print(f'From 40 to 50: {num40To50 / num * 100:.2f}%')
print(f'Invalid numbers: {invalid_num / num * 100:.2f}%')