Compilare: main.cpp: In function 'void output()': main.cpp:69:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < s.size(); i++) ~~^~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:60:9: warning: 'tinta' may be used uninitialized in this function [-Wmaybe-uninitialized] if (x == tinta) ^~