vancouver-index

Your mission

Add up n divisions, each rounded to the nearest whole instead of truncated.

today's brief

Vancouver, 1982. The stock exchange launches an index at 1000 points and recomputes it thousands of times a day, truncating the result every single time instead of rounding it. Each recalculation quietly loses a sliver. Twenty two months later the index reads 524 while the market had actually gone up, and they have to stop everything and restate it to 1098. Round it properly.

See it in action

index_value({1,3}, {2,2}, 2)

Expected result

Your checklist

For your own tracking. Tests grade your code.

num and den hold n pairs. Every num is zero or more, every den is one or more.
Each pair contributes num divided by den, rounded to the nearest whole number.
A pair sitting exactly halfway rounds up.
Return the total.

More examples

index_value({5}, {3}, 1)

Expected result

index_value({4}, {3}, 1)

Expected result

Constraints

Expected files

index.c

Allowed functions

None. Write every helper yourself.

Back to compete

Solutions

vancouver-index

Your mission

Add up n divisions, each rounded to the nearest whole instead of truncated.

today's brief

See it in action

index_value({1,3}, {2,2}, 2)

Expected result

Your checklist

For your own tracking. Tests grade your code.

num and den hold n pairs. Every num is zero or more, every den is one or more.
Each pair contributes num divided by den, rounded to the nearest whole number.
A pair sitting exactly halfway rounds up.
Return the total.

More examples

index_value({5}, {3}, 1)

Expected result

index_value({4}, {3}, 1)

Expected result

Constraints

Expected files

index.c

Allowed functions

None. Write every helper yourself.

Back to compete

Solutions