Compilare: user.cpp: In function ‘int main()’: user.cpp:27:26: warning: statement has no effect [-Wunused-value] v[contor]==1; ^ user.cpp:19:18: warning: unused variable ‘conta’ [-Wunused-variable] int contor=0,conta=0,contb=0,v[5000],inv=0; ^ user.cpp:19:26: warning: unused variable ‘contb’ [-Wunused-variable] int contor=0,conta=0,contb=0,v[5000],inv=0; ^ user.cpp:10:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("par.in","r",stdin); ^ user.cpp:11:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("par.out","w",stdout); ^ user.cpp:12:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:18:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&c); ^ user.cpp:22:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&c); ^