Compilare: main.cpp: In function 'void add(int)': main.cpp:14:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<dispersionTable[wh].size();++i) ~^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'bool findd(int)': main.cpp:21:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<dispersionTable[wh].size();++i) ~^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:27:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("abc2.in","r",stdin); ^ main.cpp:28:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("abc2.out","w",stdout); ^ main.cpp:29:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", s); ^