Compilare: user.cpp: In function ‘int main()’: user.cpp:32:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i < t.size() && ok;i++) { ~~^~~~~~~~~~ user.cpp:35:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(r1 + pas1 < pos[t[i] - 'a'].size() && pos[t[i] - 'a'][r1 + pas1] < curpos) ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ user.cpp:42:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(r1 + r + pas - 1 >= pos[t[i] - 'a'].size()) ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~ user.cpp:31:21: warning: unused variable ‘aux’ [-Wunused-variable] int aux = r + pas; ^~~ user.cpp:13:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("balbaiala.in", "r", stdin); ^ user.cpp:14:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("balbaiala.out", "w", stdout); ^