answer.code: In function ‘void Solve()’:
answer.code:37:16: error: ISO C++ forbids declaration of ‘i’ with no type [-fpermissive]
   37 |     for(auto & i : v){
      |                ^
answer.code:37:20: warning: range-based ‘for’ loops only available with ‘-std=c++11’ or ‘-std=gnu++11’
   37 |     for(auto & i : v){
      |                    ^
answer.code:37:20: error: forming reference to reference type ‘std::vector<int>&’
answer.code:43:16: error: ISO C++ forbids declaration of ‘i’ with no type [-fpermissive]
   43 |     for(auto & i : v){
      |                ^
answer.code:43:20: warning: range-based ‘for’ loops only available with ‘-std=c++11’ or ‘-std=gnu++11’
   43 |     for(auto & i : v){
      |                    ^
answer.code:43:20: error: forming reference to reference type ‘std::vector<int>&’
answer.code:49:16: error: ISO C++ forbids declaration of ‘i’ with no type [-fpermissive]
   49 |     for(auto & i : v){
      |                ^
answer.code:49:20: warning: range-based ‘for’ loops only available with ‘-std=c++11’ or ‘-std=gnu++11’
   49 |     for(auto & i : v){
      |                    ^
answer.code:49:20: error: forming reference to reference type ‘std::vector<int>&’
answer.code:56:16: error: ISO C++ forbids declaration of ‘i’ with no type [-fpermissive]
   56 |     for(auto & i : v){
      |                ^
answer.code:56:20: warning: range-based ‘for’ loops only available with ‘-std=c++11’ or ‘-std=gnu++11’
   56 |     for(auto & i : v){
      |                    ^
answer.code:56:20: error: forming reference to reference type ‘std::vector<int>&’