Compilare: main.cpp: In function 'int main()': main.cpp:96:18: warning: unused variable 'it' [-Wunused-variable] for(auto it:in[i]){ ^~ main.cpp:80:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&n,&k,&q); ^ main.cpp:83:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&l[i],&r[i]); ^