Compilare: main.cpp: In function 'int main()': main.cpp:18:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&n,&k); ^ main.cpp:20:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&x); ^ main.cpp:21:13: warning: 's' may be used uninitialized in this function [-Wmaybe-uninitialized] s=(s+x)%k; ~~^~~