Compilare: user.cpp: In function ‘int main()’: user.cpp:117:28: warning: unused variable ‘i’ [-Wunused-variable] int p,x1,y1,x2,y2,cost,i,j; ^ user.cpp:117:30: warning: unused variable ‘j’ [-Wunused-variable] int p,x1,y1,x2,y2,cost,i,j; ^ user.cpp:135:21: warning: unused variable ‘mij’ [-Wunused-variable] int st=0,dr=INF,mij,sol; ^ user.cpp:145:11: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<sol<<"\n"; ^