/in/foo.cc: In function 'int query(int, int, int, int, int)':
/in/foo.cc:30:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int x=0;x<pi.size();x++) si+=cnt[lc[pi[x]]];
                ~^~~~~~~~~~
/in/foo.cc:31:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int x=0;x<pj.size();x++) sj+=cnt[lc[pj[x]]];
                ~^~~~~~~~~~
/in/foo.cc:34:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for(int x=0;x<pi.size();x++) pi[x]=lc[pi[x]];
                   ~^~~~~~~~~~
/in/foo.cc:35:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for(int x=0;x<pj.size();x++) pj[x]=lc[pj[x]];
                   ~^~~~~~~~~~
/in/foo.cc:39:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for(int x=0;x<pi.size();x++) pi[x]=rc[pi[x]];
                   ~^~~~~~~~~~
/in/foo.cc:40:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for(int x=0;x<pj.size();x++) pj[x]=rc[pj[x]];
                   ~^~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:70:12: warning: unused variable 'k' [-Wunused-variable]
    int i,j,k,t;
            ^