Compilare: main.cpp: In function 'int main()': main.cpp:93:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<qres.size();j++) ~^~~~~~~~~~~~ main.cpp:66:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sequencequery.in","r",stdin); ^ main.cpp:67:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sequencequery.out","w",stdout); ^