View Compilation Error

0_0_4150159_15313.cpp: In function `lld pow_mod(lld, lld)':
0_0_4150159_15313.cpp:16: error: `c' undeclared (first use this function)
0_0_4150159_15313.cpp:16: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4150159_15313.cpp: In function `lld c(lld, lld)':
0_0_4150159_15313.cpp:19: error: `lld c(lld, lld)' used prior to declaration
0_0_4150159_15313.cpp: In function `lld solve(lld, lld)':
0_0_4150159_15313.cpp:25: error: `C' undeclared (first use this function)
0_0_4150159_15313.cpp: In function `int main()':
0_0_4150159_15313.cpp:28: error: expected primary-expression before '=' token
0_0_4150159_15313.cpp:28: error: `tc' undeclared (first use this function)
0_0_4150159_15313.cpp:28: error: `i' undeclared (first use this function)
0_0_4150159_15313.cpp:28: error: `n' undeclared (first use this function)
0_0_4150159_15313.cpp:28: error: `m' undeclared (first use this function)