Compilare: main.cpp: In function 'int main()': main.cpp:108:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<S.size(); i++) ~^~~~~~~~~ main.cpp:125:62: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'int' [-Wformat=] printf("%lld\n", query(M[i.second]) - query(M[i.first] - 1)); ^ main.cpp:78:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("asi.in", "r", stdin); ^ main.cpp:79:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("asi.out", "w", stdout); ^ main.cpp:82:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &q); ^ main.cpp:86:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld", &a, &b); ^