/in/foo.cc: In function 'void init()':
/in/foo.cc:66:9: warning: unused variable 'l' [-Wunused-variable]
     int l=0,r;
         ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:90:26: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
     printf("%d\n",ans+tot);
                          ^