Compilare: main.cpp: In function 'int main()': main.cpp:114:14: warning: variable 'it' set but not used [-Wunused-but-set-variable] for(auto it:tmp){ ^~ main.cpp:112:9: warning: unused variable 'ind' [-Wunused-variable] int ind = 0; ^~~ main.cpp:101:34: 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,&q); ^ main.cpp:105:46: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d %d",&x,&yy,&xx,&y); ^