Compilare: main.cpp: In function 'int main()': main.cpp:88:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a[w]==v[w].y) ~~~~^~~~~~~~ main.cpp:113:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(a[w]==v[w].y) ~~~~^~~~~~~~ main.cpp:12:20: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&b); ^