Compilare: user.cpp: In function ‘int main()’: user.cpp:93:22: warning: unused variable ‘m’ [-Wunused-variable] int k,left,right,m,y,a,b,i,j,node,add,maxflow=0; ^ user.cpp:93:24: warning: unused variable ‘y’ [-Wunused-variable] int k,left,right,m,y,a,b,i,j,node,add,maxflow=0; ^ user.cpp:93:28: warning: unused variable ‘b’ [-Wunused-variable] int k,left,right,m,y,a,b,i,j,node,add,maxflow=0; ^ user.cpp:91:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bal2.in","r",stdin); ^ user.cpp:92:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bal2.out","w",stdout); ^ user.cpp:95:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.cpp:99:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf",&x); ^