Compilare: user.cpp: In function ‘void back(int, int)’: user.cpp:28:31: warning: variable ‘q’ set but not used [-Wunused-but-set-variable] { for(unsigned int ll,cc,q,r=0; r<L[i].size(); ++r) ^ user.cpp: In function ‘int main()’: user.cpp:46:28: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘char*’ [-Wformat=] { scanf("%d",&v[i][j]); ^ user.cpp:69:24: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘int’ [-Wformat=] printf("%ld\n",smin); ^ user.cpp:43:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma3.in","r",stdin); freopen("suma3.out","w",stdout); ^ user.cpp:43:67: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma3.in","r",stdin); freopen("suma3.out","w",stdout); ^ user.cpp:44:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&a,&b); ^ user.cpp:46:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] { scanf("%d",&v[i][j]); ^