Compilare: main.cpp: In function 'int main()': main.cpp:49:9: warning: unused variable 't' [-Wunused-variable] int t=0; ^ main.cpp:27:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld" ,&n); ^ main.cpp:51:40: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld%lld" ,&a ,&b); ^