Compilare: user.cpp: In function ‘int main()’: user.cpp:11:21: warning: variable ‘y1’ set but not used [-Wunused-but-set-variable] int n,m,i,u=0,u2,x1,y1,val1,x2,y2,val2,inc,tip,a,b,k,num,st,dr,mij,j,poz1,poz2,cnt,e; ^ user.cpp:11:29: warning: variable ‘x2’ set but not used [-Wunused-but-set-variable] int n,m,i,u=0,u2,x1,y1,val1,x2,y2,val2,inc,tip,a,b,k,num,st,dr,mij,j,poz1,poz2,cnt,e; ^ user.cpp:9:28: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kth.in","r",stdin); ^ user.cpp:10:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kth.out","w",stdout); ^ user.cpp:12:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:14:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^ user.cpp:24:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&tip,&a,&b,&k); ^ user.cpp:59:14: warning: ‘mij’ may be used uninitialized in this function [-Wmaybe-uninitialized] y2=in[poz2].y; ^