Printer Levels

Given a dictionary of how many more pages each ink color can print, output the maximum number of pages the printer can print before any of the colors run out.

Examples

ink_levels({
  "cyan": 23,
  "magenta": 12,
  "yellow": 10
}) ➞ 10

ink_levels({
  "cyan": 432,
  "magenta": 543,
  "yellow": 777
}) ➞ 432

ink_levels({
  "cyan": 700,
  "magenta": 700,
  "yellow": 0
}) ➞ 0

Notes

A single printed page requires each color once, so printing is not possible if any of the slots lack ink (see example #3).