Compilare: user.cpp: In function ‘int main()’: user.cpp:83:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(Q0[0] <= Q1[0]) ^ user.cpp:85:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(Q0.size() > 1 && Q0[1] <= Q1[0]) movec0(); ^ user.cpp:90:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(Q1.size() > 1 && Q0[0] > Q1[1]) movec1(); ^ user.cpp:68:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("k1.in", "r", stdin); ^