Compilare: main.cpp: In function 'void dfs(int)': main.cpp:50:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j <= dp[fiu].size() && siz + j <= k + 1; ++j) ~~^~~~~~~~~~~~~~~~~ main.cpp:57:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int it = 0; it < dp[fiu].size() && j + it <= k; ++it) ~~~^~~~~~~~~~~~~~~~ main.cpp:67:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(dp[nod].size() <= k) ~~~~~~~~~~~~~~~^~~~ main.cpp:80:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j < dp[nod].size(); ++j) ~~^~~~~~~~~~~~~~~~ main.cpp: At global scope: main.cpp:87:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] main() ^