Compilare: main.cpp: In function 'bool bfs(int, int)': main.cpp:20:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[pz].size(); ++i) ~^~~~~~~~~~~~~ main.cpp: In function 'int dfs(int, int, int)': main.cpp:33:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[pz].size(); ++i) ~^~~~~~~~~~~~~ main.cpp: In function 'int maxflow(int, int)': main.cpp:55:33: warning: suggest parentheses around assignment used as truth value [-Wparentheses] while(cur=dfs(S,D,200003)) ^ main.cpp: In function 'int main()': main.cpp:68:11: warning: unused variable 'j' [-Wunused-variable] int i,j,m,k=0,n,x,y; ^ main.cpp:68:15: warning: unused variable 'k' [-Wunused-variable] int i,j,m,k=0,n,x,y; ^ main.cpp:85:22: warning: 'x' is used uninitialized in this function [-Wuninitialized] cout<<maxflow(x,y); ^ main.cpp:85:22: warning: 'y' is used uninitialized in this function [-Wuninitialized]