/in/foo.cc: In function 'int main()':
/in/foo.cc:7:17: warning: unused variable 'j' [-Wunused-variable]
   long m,s2,t,i,j,k,s[300001]={0},s1[300001]={0},m1[300001]={0};
                 ^
/in/foo.cc:7:19: warning: unused variable 'k' [-Wunused-variable]
   long m,s2,t,i,j,k,s[300001]={0},s1[300001]={0},m1[300001]={0};
                   ^