Compilare: main.cpp: In function 'int main()': main.cpp:101:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ssnd.in", "r", stdin); ^ main.cpp:102:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ssnd.out", "w", stdout); ^ main.cpp:104:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ main.cpp:108:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &n); ^ main.cpp: In function 'void ciurul()': main.cpp:49:18: warning: iteration 1000003 invokes undefined behavior [-Waggressive-loop-optimizations] if(ciur[i]==0) ~~~~~~^ main.cpp:47:18: note: within this loop for(int i=2;i<=1000005;i++) ~^~~~~~~~~