Compilare: main.cpp: In function 'int main()': main.cpp:70:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < orizontal.size(); i++) ~~^~~~~~~~~~~~~~~~~~ main.cpp:72:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j < orizontal.size(); j++) ~~^~~~~~~~~~~~~~~~~~ main.cpp:74:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < vertical.size(); k++) ~~^~~~~~~~~~~~~~~~~ main.cpp:76:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int l = k + 1; l < vertical.size(); l++) ~~^~~~~~~~~~~~~~~~~