Compilare: user.cpp: In function ‘int main()’: user.cpp:63:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld",&m); ^ user.cpp:66:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld%lld",&a,&b); ^ user.cpp: In function ‘void ciurr()’: user.cpp:12:14: warning: iteration 999999 invokes undefined behavior [-Waggressive-loop-optimizations] if(ciur[i]==0){ ~~~~~~^ user.cpp:11:12: note: within this loop for(i=2;i<=N;i++){ ~^~~