Compilare: user.cpp: In function ‘int main()’: user.cpp:42:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=a[x][y]-1;i<P.size()-1;++i) ^ user.cpp:16:19: warning: unused variable ‘j’ [-Wunused-variable] int n,x,y,l,i,j,d,rez=0; ^ user.cpp:14:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zona.in","r",stdin); ^ user.cpp:15:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zona.out","w",stdout); ^ user.cpp:18:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&x,&y,&n,&l); ^ user.cpp:25:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&d); ^