Microgrid Weekly Output Average

A community microgrid operator collects daily energy-output readings, in kilowatt-hours, from several solar sensors scattered across a small solar farm. More than one sensor may log a reading on the same day, in which case the farm's output for that day is the sum of all readings logged on it. It is guaranteed that every day from day 1 through the last day that appears in the log has at least one logged reading — no day in that range is skipped. For every day starting from the 7th day onward, the operator wants a rolling weekly report: the total energy produced on that day and the six days immediately before it, together with the average daily output over that same seven-day window, rounded to exactly two decimal places.

Input format

Line 1: an integer m, the number of sensor readings. Each of the next m lines contains two integers day and amount, meaning a sensor logged amount kWh of output on day number day.

Output format

Let D be the largest day value that appears in the log. For every day d from 7 to D (inclusive), in increasing order, print one line with three space-separated values: d total average, where total is the sum of the farm's daily output over days d-6 through d inclusive, and average is total divided by 7, rounded to exactly two decimal places using standard round-half-up rounding, printed with exactly two digits after the decimal point (for example 7.50, not 7.5). If D is less than 7, print nothing.

Constraints

• 1 <= m <= 100000
• 1 <= day <= 100000
• 0 <= amount <= 10000
• Every integer from 1 to the largest day value that appears among the readings appears at least once as some reading's day.

8
1 10
2 10
3 10
4 10
5 10
6 10
7 10
8 10

7 70 10.00
8 70 10.00

9
1 2
2 4
3 6
4 8
5 10
6 12
7 5
7 6
8 1

7 53 7.57
8 52 7.43