/in/foo.cc: In function 'int main()':
/in/foo.cc:39:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0;i<strlen(st);i++)
               ~^~~~~~~~~~~
/in/foo.cc: In function 'void multiplication(int)':
/in/foo.cc:8:36: warning: iteration 10004 invokes undefined behavior [-Waggressive-loop-optimizations]
  for (int i=1;i<=100000;i++) ans[i]*=k;
                              ~~~~~~^~~
/in/foo.cc:8:16: note: within this loop
  for (int i=1;i<=100000;i++) ans[i]*=k;
               ~^~~~~~~~
/in/foo.cc:11:11: warning: iteration 10003 invokes undefined behavior [-Waggressive-loop-optimizations]
   ans[i+1]+=ans[i]/mods;
           ^
/in/foo.cc:9:16: note: within this loop
  for (int i=1;i<=100000;i++)
               ~^~~~~~~~
/in/foo.cc: In function 'void power(int)':
/in/foo.cc:26:36: warning: iteration 10004 invokes undefined behavior [-Waggressive-loop-optimizations]
  for (int i=1;i<=100000;i++) sum[i]*=k;
                              ~~~~~~^~~
/in/foo.cc:26:16: note: within this loop
  for (int i=1;i<=100000;i++) sum[i]*=k;
               ~^~~~~~~~
/in/foo.cc:29:11: warning: iteration 10003 invokes undefined behavior [-Waggressive-loop-optimizations]
   sum[i+1]+=sum[i]/mods;
           ^
/in/foo.cc:27:16: note: within this loop
  for (int i=1;i<=100000;i++)
               ~^~~~~~~~