Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:93:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pump(src, snk) == g[u].size() - 1) ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~ main.cpp:115:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pump(src, snk) == g[u].size()) ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp:70:7: warning: 'papa' may be used uninitialized in this function [-Wmaybe-uninitialized] int papa; ^~~~