Compilare: user.cpp: In function ‘int main()’: user.cpp:59:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < pos.size() - 1; ++i) ^ user.cpp:47:7: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized] a+= 1; ^ user.cpp:52:28: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized] for (int i = max(a, 0); i <= b; ++i) { ^