Compilare: main.cpp: In function 'int main()': main.cpp:34:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cufar.in","r",stdin); ^ main.cpp:35:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cufar.out","w",stdout); ^ main.cpp:37:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &cer, &t); ^ main.cpp:41:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ main.cpp:48:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ main.cpp: In function 'void ciurr()': main.cpp:11:18: warning: iteration 500001 invokes undefined behavior [-Waggressive-loop-optimizations] if(ciur[i]==0){ ~~~~~~^ main.cpp:10:18: note: within this loop for(int i=3;i<=NMAX;i+=2) ~^~~~~~