Compilare: user.cpp: In function ‘void bfs(int (*)[1005][1005])’: user.cpp:22:9: warning: unused variable ‘t’ [-Wunused-variable] int t,l,c,type,cost,lnou,cnou,tnou; ^ user.cpp:22:35: warning: variable ‘tnou’ set but not used [-Wunused-but-set-variable] int t,l,c,type,cost,lnou,cnou,tnou; ^~~~ user.cpp: In function ‘int main()’: user.cpp:61:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("robot2.in","r",stdin); ^ user.cpp:62:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("robot2.out","w",stdout); ^ user.cpp:63:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:66:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]); ^ user.cpp:67:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&l1,&c1,&l2,&c2); ^