/in/foo.cc: In function 'void solve()':
/in/foo.cc:12:12: warning: unused variable 'v' [-Wunused-variable]
  int i,j,k,v,delta,rr,tt=0,mm=1e9;
            ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:69:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j,k;
        ^
/in/foo.cc:69:10: warning: unused variable 'k' [-Wunused-variable]
  int i,j,k;
          ^