Compilare: user.cpp: In member function ‘void aint::sum(int)’: user.cpp:34:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < data[node].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:96:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("galerie.in","r",stdin); ^ user.cpp:97:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("galerie.out","w",stdout); ^ user.cpp:99:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &t); ^ user.cpp:101:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &cnt); ^ user.cpp:111:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &cnt); ^