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:38:72: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = max(1, (int)max(k1 - a.size(), s - k2 - b.size())); i < ab.size(); ++i) { ~~^~~~~~~~~~~ main.cpp:51:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (posinam + 1 < inam.size()) ~~~~~~~~~~~~^~~~~~~~~~~~~ main.cpp:53:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (posa + 1 < a.size()) ~~~~~~~~~^~~~~~~~~~ main.cpp:55:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (posb + 1 < b.size()) ~~~~~~~~~^~~~~~~~~~