/in/foo.cc: In function 'void BFS(int)':
/in/foo.cc:14:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int k=0;k<s[i].size();k++){
                ~^~~~~~~~~~~~
/in/foo.cc: In function 'void BFS1(int)':
/in/foo.cc:34:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int k=0;k<z[i].size();k++){
               ~^~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:63:8: warning: iteration 104 invokes undefined behavior [-Waggressive-loop-optimizations]
    w[i]=0;
    ~~~~^~
/in/foo.cc:62:16: note: within this loop
   for(int i=1;i<=105;i++){
               ~^~~~~
/in/foo.cc:57:8: warning: iteration 104 invokes undefined behavior [-Waggressive-loop-optimizations]
    w[i]=0;
    ~~~~^~
/in/foo.cc:56:16: note: within this loop
   for(int i=1;i<=105;i++){
               ~^~~~~
/in/foo.cc:46:9: warning: iteration 104 invokes undefined behavior [-Waggressive-loop-optimizations]
   Ans[i]=1;
   ~~~~~~^~
/in/foo.cc:45:15: note: within this loop
  for(int i=1;i<=105;i++){
              ~^~~~~