Compilare: user.cpp: In function ‘int main()’: user.cpp:55:15: warning: unused variable ‘tip’ [-Wunused-variable] int N,M,i,tip,x,y,st,dr=0; ^ user.cpp:55:23: warning: variable ‘st’ set but not used [-Wunused-but-set-variable] int N,M,i,tip,x,y,st,dr=0; ^ user.cpp:56:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("saracsaurege.in","r",stdin); ^ user.cpp:57:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("saracsaurege.out","w",stdout); ^ user.cpp:58:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N,&M); ^ user.cpp:60:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^ user.cpp:64:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x,&y); ^