View Compilation Error

0_0_4587501_24793.cpp: In function `bool Bellman_Ford(int)':
0_0_4587501_24793.cpp:18: error: `n' undeclared (first use this function)
0_0_4587501_24793.cpp:18: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4587501_24793.cpp:23: error: `m' undeclared (first use this function)
0_0_4587501_24793.cpp: In function `int main()':
0_0_4587501_24793.cpp:41: error: `n' undeclared (first use this function)
0_0_4587501_24793.cpp:41: error: `m' undeclared (first use this function)