Compilare: main.cpp: In function 'int main()': main.cpp:52:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < queries.size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp:39:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("23.in", "r", stdin); ^ main.cpp:40:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("23.out", "w", stdout); ^ main.cpp:44:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ main.cpp:46:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^