求图中的一条最长路径，又是回溯。
For each test case, print the length of the longest road on a single line.
它也是加拿大最古老和最长的徒步旅行路径即著名的布鲁斯步道的北部终点站。
It is also home to the northern terminus of the famous Bruce trail, the oldest and longest hiking trail in Canada.
注意到如果不考虑资源，通过关键路径的时间是9天(通过各种各样顺序排列的步骤所需的最长时间)。
Note that without resource considerations, the length of time through the critical path is nine days (longest time through the various sequential steps).
最后我还想做成一个可以用来记录执行路径和相关性能度量的aspect，这样就可以看到执行时间最长的方法调用。
I'd also like to end up with an aspect I can use for logging execution paths and associated performance metrics so I can see which method calls are taking the longest times to execute.
甘肃省是国内管道路径最长的省份之一，共有7条管道穿越，里程达到7000公里。
Gansu province is the province, one of the longest pipeline route, a total of seven pipeline crossing, the mileage of 7000 kilometers.
为了便于计算机处理，将有向图用矩阵表示，通过有向图矩阵的乘法运算搜索最长的有向路径。
For computer processing of the directed digraph, it is expressed by a matrix, and then the longest directed paths can be obtained through matrices multiplication.
结果表明：“最长覆盖时间”算法与“最短路径”算法相比，能更有效地改善系统的性能。
The results indicate that "the longest covered-time" routing algorithm can improve the system performance compared with "the shortest path" one.
随后给出了SHA - 1算法模块的详细ASIC设计，优化了SHA - 1模块最长关键路径上的逻辑结构。
Then a detailed ASIC design of the SHA-1 algorithm module is given, whose logic on the longest critical path is optimized.
给定一个整数矩阵，计算其最长递增路径的长度。
Given an integer matrix, find the length of the longest increasing path.
给定一个整数矩阵，计算其最长递增路径的长度。
Given an integer matrix, find the length of the longest increasing path.
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