Compilare: main.cpp: In function 'void input()': main.cpp:30:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < ab.size(); ++i) ~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:39:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = start; i < ab.size(); ++i) { ~~^~~~~~~~~~~ main.cpp:41:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (posa + 1 < a.size() && posa < k1 - i) ~~~~~~~~~^~~~~~~~~~ main.cpp:43:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (posb + 1 < b.size() && posb < s - k2 - i) ~~~~~~~~~^~~~~~~~~~ main.cpp:57:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (posinam + 1 < inam.size()) ~~~~~~~~~~~~^~~~~~~~~~~~~ main.cpp:59:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (posa + 1 < a.size()) ~~~~~~~~~^~~~~~~~~~ main.cpp:61:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (posb + 1 < b.size()) ~~~~~~~~~^~~~~~~~~~