View Compilation Error

0_0_8383586_22602.cpp:3: error: expected unqualified-id before '{' token
0_0_8383586_22602.cpp:3: error: expected `,' or `;' before '{' token
0_0_8383586_22602.cpp: In function `long long int bs(int, int, long long int)':
0_0_8383586_22602.cpp:4: error: `v' undeclared (first use this function)
0_0_8383586_22602.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)