实验报告地图着色很好用的东西。希望对大家有帮助。-coloring maps of good things. We want to help.

地球着色 任何平面地图可以使用4种颜色给每个不同的城市着色，而保证相邻的城市着不同的颜色。-Coloring the Earth can use any graphic map color to each of four kinds of different colored city, and neighboring cities to ensure that the different colors.