Compilare: main.cpp: In function 'int main()': main.cpp:56:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < v.size() ; j++){ ~~^~~~~~~~~~ main.cpp:22:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&n,&sigma); ^ main.cpp:29:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&x); ^