Compilare: user.cpp: In function ‘void read()’: user.cpp:15:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i < (s2.size() / 2); i++){ ^ user.cpp:23:68: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=s2.size() - 1; i >= (s2.size() / 2) + (s2.size() % 2); i--){ ^ user.cpp: In function ‘void Z1()’: user.cpp:38:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<=g1.size()-(s2.size() / 2); i++){ ^ user.cpp: In function ‘void Z2()’: user.cpp:56:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<=g2.size()-(s2.size() / 2); i++){ ^ user.cpp: In function ‘int solve()’: user.cpp:71:58: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i= (s2.size() / 2) + 1; i<g1.size()-s2.size(); i++){ ^ user.cpp:81:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<=(s2.size() / 2); i++){ ^ user.cpp:84:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:91:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("aparitii2.in" , "r" , stdin); ^ user.cpp:92:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("aparitii2.out" , "w" , stdout); ^