Compilare: main.cpp: In function 'void add_element(long long int)': main.cpp:14:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < H[Hash].size(); i++){ ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int element_search(long long int)': main.cpp:25:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < H[Hash].size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:33:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("taietura.in", "r", stdin); ^ main.cpp:34:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("taietura.out", "w", stdout); ^ main.cpp:36:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &N); ^ main.cpp:38:72: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &v[i]), sumLeft[i] = 1LL * (v[i] + sumLeft[i - 1]); ^