题目 Source http://www.lightoj.com/volume_showproblem.php?problem=1171 Description Given an m x n chessboard where some of the cells are broken. Now you are about to place chess knights in the chessboard. You have to find the maximum number of knights…
Guardian of Decency Time Limit: 3000MS Memory Limit: 65536K Total Submissions: 6133 Accepted: 2555 Description Frank N. Stein is a very conservative high-school teacher. He wants to take some of his students on an excursion, but he is afraid that…
Graph Coloring Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 5775 Accepted: 2678 Special Judge Description You are to write a program that tries to find an optimal coloring for a given graph. Colors are applied to the nodes of the…