/in/foo.cc: In function 'long long int dfs(long long int, long long int)':
/in/foo.cc:77:34: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
    if(tmp=dfs(v,min(flow,dis[i]))){
                                  ^
/in/foo.cc: In function 'void dinic()':
/in/foo.cc:89:30: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   while(tmp=dfs(s,0x7ffffffff))
                              ^