Compilare: user.cpp: In function ‘bool Cnt(int)’: user.cpp:16:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[lin].size(); i++) ^ user.cpp: In function ‘void Ins(int)’: user.cpp:24:24: warning: unused variable ‘i’ [-Wunused-variable] { int lin = x % MOD, i; ^ user.cpp: In function ‘int main()’: user.cpp:41:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < clen; i++) ^ user.cpp:51:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < slen; i++) ^ user.cpp:53:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < clen) ^ user.cpp:62:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i == clen-1) ^ user.cpp:65:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i >= clen-1 && Cnt(val)) ^