/in/foo.cc: In function 'int query(int, int, int, int, int)':
/in/foo.cc:40:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int x=0;x<pi.size();x++) si+=num[lc[pi[x]]];
                ~^~~~~~~~~~
/in/foo.cc:41:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int x=0;x<pj.size();x++) sj+=num[lc[pj[x]]];
                ~^~~~~~~~~~
/in/foo.cc:44:20: 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:45:20: 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:49:20: 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:50:20: 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:83:12: warning: unused variable 'k' [-Wunused-variable]
    int i,j,k,t;
            ^