/in/foo.cc: In function 'int DP(int)':
/in/foo.cc:5:13: warning: unused variable 'k' [-Wunused-variable]
     int i,j,k,top=0,sum=0;
             ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:23:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for (i=2;i<11;i++)
     ^~~
/in/foo.cc:27:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
  cin>>n>>m;
  ^~~