View Compilation Error

0_0_36942904_21526.cpp: In function 'll solve(ll, ll)':
0_0_36942904_21526.cpp:56:4: error: redefinition of 'll solve(ll, ll)'
 ll solve(ll res, ll q)
    ^
0_0_36942904_21526.cpp:27:4: note: 'll solve(ll, ll)' previously defined here
 ll solve(ll res, ll q)
    ^
0_0_36942904_21526.cpp: In function 'int main()':
0_0_36942904_21526.cpp:123:37: error: 'solve2' was not declared in this scope
                 ll ans = solve2(q, q);
                                     ^
0_0_36942904_21526.cpp:147:33: error: 'pai' was not declared in this scope
                 printf("%lld ", pai[i].second);
                                 ^