Compilare: main.cpp: In function 'int main()': main.cpp:59:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&q); ^ main.cpp:61:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%lld%lld",&a,&b); ^ main.cpp: In function 'void ciurr()': main.cpp:9:20: warning: iteration 999998 invokes undefined behavior [-Waggressive-loop-optimizations] if (!ciur[i]){ ~~~~~~^ main.cpp:8:15: note: within this loop for (i=2;i<=1000000;i++){ ~^~~~~~~~~