Compilare: user.cpp: In function ‘void Hamilton()’: user.cpp:40:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( k = 0; k < v[j].size(); k++ ){ ^ user.cpp:48:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[0].size();i++) ^ user.cpp:28:18: warning: unused variable ‘XOR’ [-Wunused-variable] int i, j, k, N2, XOR; ^ user.cpp: In function ‘void Citire()’: user.cpp:18:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d\n",&N,&M); ^ user.cpp:20:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d\n",&x,&y,&z); ^