Compilare: main.cpp: In function 'int main()': main.cpp:31:13: warning: unused variable 'j' [-Wunused-variable] int n,m,j,k,i,sav,c,cm,con; ^ main.cpp:29:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cmmmc.in","r",stdin); ^ main.cpp:30:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cmmmc.out","w",stdout); ^ main.cpp:32:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:36:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&m); ^ main.cpp: In function 'int ciur()': main.cpp:11:16: warning: iteration 22359 invokes undefined behavior [-Waggressive-loop-optimizations] if (w[i]==0) ~~~^ main.cpp:9:15: note: within this loop for (i=3;i<=44721;i=i+2) ~^~~~~~~