Compilare: user.cpp: In function ‘void ford_fulkerson()’: user.cpp:82:37: warning: operation on ‘lg’ may be undefined [-Wsequence-point] L[++lg]=abs(viz[L[lg-1]]); ^ user.cpp:70:11: warning: unused variable ‘f_min’ [-Wunused-variable] int i,f_min,b,lg,v,L[V],a,y=0; ^ user.cpp:70:17: warning: unused variable ‘b’ [-Wunused-variable] int i,f_min,b,lg,v,L[V],a,y=0; ^ user.cpp:70:22: warning: unused variable ‘v’ [-Wunused-variable] int i,f_min,b,lg,v,L[V],a,y=0; ^ user.cpp:70:31: warning: unused variable ‘y’ [-Wunused-variable] int i,f_min,b,lg,v,L[V],a,y=0; ^ user.cpp: In function ‘void solve()’: user.cpp:100:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,p,nr=0,sol[N]; ^ user.cpp:100:13: warning: unused variable ‘p’ [-Wunused-variable] int i,j,p,nr=0,sol[N]; ^ user.cpp: In function ‘void citire()’: user.cpp:26:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&n,&k); ^ user.cpp:31:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&t1,&t2); ^