Compilare: user.cpp: In function ‘int main(int, const char**)’: user.cpp:75:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (k1 < v[y].size() && k2 < v[z].size()) ^ user.cpp:75:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (k1 < v[y].size() && k2 < v[z].size()) ^ user.cpp:23:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &N, &Q); ^ user.cpp:27:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &K); ^ user.cpp:30:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &x); ^ user.cpp:38:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d %d", &x, &y, &z); ^