Compilare: user.cpp: In function ‘int main()’: user.cpp:51:30: warning: integer overflow in expression [-Woverflow] d[i][j]=(1LL<<63)-1; ^ user.cpp:53:30: warning: integer overflow in expression [-Woverflow] if ((1LL<<63)-1-d[k][j]-d[k][j]>=d[i-k][j-1]) ^ user.cpp:23:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&n,&m); ^