View Compilation Error

0_0_6823758_9458.cpp:24: error: expected init-declarator before "unsigned"
0_0_6823758_9458.cpp:24: error: expected `,' or `;' before "unsigned"
0_0_6823758_9458.cpp: In function `void dfs(int, int, unsigned int, int)':
0_0_6823758_9458.cpp:46: error: `Cover' undeclared (first use this function)
0_0_6823758_9458.cpp:46: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6823758_9458.cpp: In function `int main()':
0_0_6823758_9458.cpp:74: error: `Cover' undeclared (first use this function)
0_0_6823758_9458.cpp:93: error: `b' undeclared (first use this function)