Compilare: main.cpp: In function 'void solve()': main.cpp:38:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sequence.size(); i++) { ~~^~~~~~~~~~~~~~~~~ main.cpp:41:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sequence.size(); i++) { ~~^~~~~~~~~~~~~~~~~ main.cpp:49:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sequence.size(); i++) { ~~^~~~~~~~~~~~~~~~~ main.cpp:59:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(cnt != sequence.size() / 2 && (cnt != total || merge == 0)) { ~~~~^~~~~~~~~~~~~~~~~~~~~~