Compilare: main.cpp: In function 'int main()': main.cpp:11:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sireturi.in","r",stdin); ^ main.cpp:12:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sireturi.out","w",stdout); ^ main.cpp:45:26: warning: iteration 7499 invokes undefined behavior [-Waggressive-loop-optimizations] div=div*(vc[i]+1); ~~~~^ main.cpp:44:18: note: within this loop for(i=1;i<=7500;i++) ~^~~~~~