Compilare: main.cpp: In function 'void solve(int, int)': main.cpp:56:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < currentNode.queries.size(); ++i) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:62:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < currentNode.descendants.size(); ++i) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void read()': main.cpp:31:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:32:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &m); ^ main.cpp:36:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &parent); ^ main.cpp:44:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &q); ^ main.cpp:45:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &p); ^ main.cpp: In function 'int main()': main.cpp:75:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("stramosi.in", "r", stdin); ^ main.cpp:76:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("stramosi.out", "w", stdout); ^