Compilare: main.cpp: In function 'int cost(std::__cxx11::string)': main.cpp:41:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.length(); i++, pow *= 5) ~~^~~~~~~~~~~~ main.cpp: In function 'int e(std::__cxx11::string)': main.cpp:49:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.length(); i++) ~~^~~~~~~~~~~~ main.cpp: In function 'void dfs(int)': main.cpp:69:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[x].size(); i++) { ~~^~~~~~~~~~~~~ main.cpp: In function 'void solve2()': main.cpp:112:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < muchiiDeAles.size() && muchiiFolosite.size() < cc-1; i++) { ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:112:69: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < muchiiDeAles.size() && muchiiFolosite.size() < cc-1; i++) { ~~~~~~~~~~~~~~~~~~~~~~^~~~~~ main.cpp: In function 'void solve3()': main.cpp:135:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < muchiiFolosite.size(); i++) ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:143:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < muchiiPt3.size() && nrmuchii < n-1; i++) { ~~^~~~~~~~~~~~~~~~~~