Compilare: user.cpp: In function ‘void update(int)’: user.cpp:26:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < war[n].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:38:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &q); ^ user.cpp:40:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &x); ^ user.cpp:42:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &y); ^ user.cpp:48:50: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &query[i].l, &query[i].r); ^