Compilare: main.cpp: In function 'int main()': main.cpp:9:36: warning: unused variable 'aa' [-Wunused-variable] int l=0,i,s=0,vf=0,j,cif=0,n,m,aa,bb; ^~ main.cpp:9:39: warning: unused variable 'bb' [-Wunused-variable] int l=0,i,s=0,vf=0,j,cif=0,n,m,aa,bb; ^~ main.cpp:10:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pal.in","r",stdin); ^ main.cpp:11:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pal.out","w",stdout); ^ main.cpp:12:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &l); ^ main.cpp:14:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &fr[i]); ^ main.cpp:15:16: warning: iteration 8 invokes undefined behavior [-Waggressive-loop-optimizations] s+=fr[i]; ~~~~^ main.cpp:13:15: note: within this loop for (i=0;i<10;i++) { ~^~~