View Compilation Error

0_0_9124036_26173.cpp: In function `int dfs(int, int)':
0_0_9124036_26173.cpp:21: error: `N' undeclared (first use this function)
0_0_9124036_26173.cpp:21: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9124036_26173.cpp: In function `int main()':
0_0_9124036_26173.cpp:41: error: `N' undeclared (first use this function)
0_0_9124036_26173.cpp:46: error: expected `;' before ')' token
0_0_9124036_26173.cpp:19: error: too few arguments to function `int dfs(int, int)'
0_0_9124036_26173.cpp:50: error: at this point in file