Compilare: user.cpp: In function ‘void Solve()’: user.cpp:92:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < HASH[q1].size(); ++j) ^ user.cpp:30:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(S); len = strlen(S); v.clear(); ^ user.cpp:64:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(S); v.clear(); len = strlen(S); ^ user.cpp: In function ‘int main()’: user.cpp:114:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(scanf("%d ", &t); t; --t) ^ /tmp/cc3YD4a9.o: In function `Solve()': user.cpp:(.text+0x4c): warning: the `gets' function is dangerous and should not be used.