View Compilation Error

0_0_8249874_29151.cpp:4: error: expected unqualified-id before '{' token
0_0_8249874_29151.cpp:4: error: expected `,' or `;' before '{' token
0_0_8249874_29151.cpp: In function `int main()':
0_0_8249874_29151.cpp:8: error: `n' undeclared (first use this function)
0_0_8249874_29151.cpp:8: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8249874_29151.cpp:8: error: `m' undeclared (first use this function)
0_0_8249874_29151.cpp:9: error: `son' undeclared (first use this function)
0_0_8249874_29151.cpp:9: error: `w' undeclared (first use this function)
0_0_8249874_29151.cpp:10: error: `head' undeclared (first use this function)
0_0_8249874_29151.cpp:11: error: `dp' undeclared (first use this function)
0_0_8249874_29151.cpp:11: error: `dfs' undeclared (first use this function)