Compilare: main.cpp: In function 'std::vector<int> ad(std::vector<int>, std::vector<int>)': main.cpp:19:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0,j=0;i<a.size()&&j<b.size();) ~^~~~~~~~~ main.cpp:19:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0,j=0;i<a.size()&&j<b.size();) ~^~~~~~~~~ main.cpp:34:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<a.size())ret.push_back(a[i++]); ~^~~~~~~~~ main.cpp:35:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<b.size())ret.push_back(b[j++]); ~^~~~~~~~~ main.cpp: In function 'std::vector<int> di(std::vector<int>, std::vector<int>)': main.cpp:42:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0,j=0;i<a.size()&&j<b.size();) ~^~~~~~~~~ main.cpp:42:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0,j=0;i<a.size()&&j<b.size();) ~^~~~~~~~~ main.cpp:55:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<a.size())ret.push_back(a[i++]); ~^~~~~~~~~ main.cpp: In function 'std::vector<int> in(std::vector<int>, std::vector<int>)': main.cpp:62:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0,j=0;i<a.size()&&j<b.size();) ~^~~~~~~~~ main.cpp:62:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0,j=0;i<a.size()&&j<b.size();) ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:198:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ans.size();i++) ~^~~~~~~~~~~ main.cpp:201:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i!=ans.size()-1) ~^~~~~~~~~~~~~~