View Compilation Error

0_0_11701195_5418.cpp: In function `int main()':
0_0_11701195_5418.cpp:18: error: redeclaration of `int n'
0_0_11701195_5418.cpp:18: error: `int n' previously declared here
0_0_11701195_5418.cpp:19: error: `m' undeclared (first use this function)
0_0_11701195_5418.cpp:19: error: (Each undeclared identifier is reported only once for each function it appears in.)