Compilare: user.cpp: In function ‘bool exec(int, int, Vector, int, vPos&)’: user.cpp:16:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (x<0 || y<0 || x>=M.size() || y>=M[x].size()) return 0; ~^~~~~~~~~~ user.cpp:16:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (x<0 || y<0 || x>=M.size() || y>=M[x].size()) return 0; ~^~~~~~~~~~~~~ user.cpp:21:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (K==values.size()) return 1; ~^~~~~~~~~~~~~~~ user.cpp:23:18: warning: capture of variable ‘M’ with non-automatic storage duration auto Try = [&M,&values,&K,&result,&x,&y](int _x,int _y) ^ user.cpp:12:3: note: ‘T M’ declared here T M; ^ user.cpp: In function ‘vPos found(Vector)’: user.cpp:37:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<M.size();i++) ~^~~~~~~~~ user.cpp:38:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<M.size();j++) ~^~~~~~~~~