Compilare: main.cpp: In function 'int main()': main.cpp:25:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<aux.size(); i+=2) ~^~~~~~~~~~~ main.cpp:10:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("staropramen.in","r",stdin); ^ main.cpp:11:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("staropramen.out","w",stdout); ^