Compilare: main.c: In function 'main': main.c:10:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld",&n); ^~~~~~~~~~~~~~~~~~~~~ main.c:11:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld",&k); ^~~~~~~~~~~~~~~~~~~~~ main.c:17:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld",&a); ^~~~~~~~~~~~~~~~~~~~~ main.c:30:3: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout,"%lld %lld %lld",x+1,y+1,ma); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:30:3: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]