Compilare: user.cpp: In function ‘int memo(int, int)’: user.cpp:13:11: warning: unused variable ‘cnt’ [-Wunused-variable] int i,cnt,t,stare1,cntt,x; ^ user.cpp:13:15: warning: unused variable ‘t’ [-Wunused-variable] int i,cnt,t,stare1,cntt,x; ^ user.cpp:13:24: warning: unused variable ‘cntt’ [-Wunused-variable] int i,cnt,t,stare1,cntt,x; ^ user.cpp: In function ‘int main()’: user.cpp:33:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("cast.in","r",stdin); ^ user.cpp:34:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("cast.out","w",stdout); ^ user.cpp:35:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ user.cpp:38:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:40:52: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(j=1;j<=n;++j) scanf("%d", &a[i][j]); ^