Compilare: main.cpp: In function 'int main()': main.cpp:38:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( (lo1 < qu1.size() || lo2 < qu2.size()) && ans[0][n-1] == inf && ans[1][n-1] == inf ) ~~~~^~~~~~~~~~~~ main.cpp:38:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( (lo1 < qu1.size() || lo2 < qu2.size()) && ans[0][n-1] == inf && ans[1][n-1] == inf ) ~~~~^~~~~~~~~~~~ main.cpp:40:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( lo1 < qu1.size() ) co = qu1[lo1++]; ~~~~^~~~~~~~~~~~