Compilare: main.cpp: In function 'int main()': main.cpp:47:14: warning: variable 'found' set but not used [-Wunused-but-set-variable] bool found = false; ^~~~~ main.cpp:17:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&n,&m,&t); ^ main.cpp:21:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%u %u",&x,&y); ^ main.cpp:38:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%u %u",&x,&y); ^