/in/foo.cc: In function 'int main()':
/in/foo.cc:28:13: warning: iteration 4 invokes undefined behavior [-Waggressive-loop-optimizations]
    if(a[i][j]==min[i])
       ~~~~~~^
/in/foo.cc:26:16: note: within this loop
   for(int j=1;j<=5;j++)
               ~^~~
/in/foo.cc:32:24: warning: iteration 4 invokes undefined behavior [-Waggressive-loop-optimizations]
      if(a[i][j]>=a[k][j]) z++;
                  ~~~~~~^
/in/foo.cc:30:18: note: within this loop
     for(int k=1;k<=5;k++)
                 ~^~~
/in/foo.cc:16:13: warning: iteration 4 invokes undefined behavior [-Waggressive-loop-optimizations]
    if(a[i][j]<=min[i])
       ~~~~~~^
/in/foo.cc:13:16: note: within this loop
   for(int j=1;j<=5;j++)
               ~^~~
/in/foo.cc:9:9: warning: iteration 99 invokes undefined behavior [-Waggressive-loop-optimizations]
   min[i]=40000;
   ~~~~~~^~~~~~
/in/foo.cc:7:15: note: within this loop
  for(int i=1;i<=100;i++)
              ~^~~~~