Compilare: user.cpp: In function ‘int main()’: user.cpp:21:40: warning: format ‘%s’ expects argument of type ‘char*’, but argument 5 has type ‘char (*)[1000010]’ [-Wformat=] scanf("%d%d%d\n%s%s",&n,&m,&t,&a,&b); ^ user.cpp:21:40: warning: format ‘%s’ expects argument of type ‘char*’, but argument 6 has type ‘char (*)[1000010]’ [-Wformat=] user.cpp:19:27: warning: unused variable ‘k’ [-Wunused-variable] int m,n,len,i,l=0,r=0,k,k0,r0,t,l0,lung,q,p,nr=0,x,y; ^ user.cpp:19:29: warning: unused variable ‘k0’ [-Wunused-variable] int m,n,len,i,l=0,r=0,k,k0,r0,t,l0,lung,q,p,nr=0,x,y; ^ user.cpp:19:32: warning: unused variable ‘r0’ [-Wunused-variable] int m,n,len,i,l=0,r=0,k,k0,r0,t,l0,lung,q,p,nr=0,x,y; ^ user.cpp:19:37: warning: unused variable ‘l0’ [-Wunused-variable] int m,n,len,i,l=0,r=0,k,k0,r0,t,l0,lung,q,p,nr=0,x,y; ^ user.cpp:19:40: warning: unused variable ‘lung’ [-Wunused-variable] int m,n,len,i,l=0,r=0,k,k0,r0,t,l0,lung,q,p,nr=0,x,y; ^ user.cpp:19:45: warning: unused variable ‘q’ [-Wunused-variable] int m,n,len,i,l=0,r=0,k,k0,r0,t,l0,lung,q,p,nr=0,x,y; ^ user.cpp:19:47: warning: unused variable ‘p’ [-Wunused-variable] int m,n,len,i,l=0,r=0,k,k0,r0,t,l0,lung,q,p,nr=0,x,y; ^ user.cpp:19:49: warning: unused variable ‘nr’ [-Wunused-variable] int m,n,len,i,l=0,r=0,k,k0,r0,t,l0,lung,q,p,nr=0,x,y; ^ user.cpp:17:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("x.in","r",stdin); ^ user.cpp:18:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("x.out","w",stdout); ^ user.cpp:21:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d\n%s%s",&n,&m,&t,&a,&b); ^ user.cpp:57:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^