poj2190

简单题

View Code

   
     

    
      #include 
    
      <
    
      iostream
    
      >
    
      
#include 
    
      <
    
      cstdlib
    
      >
    
      
#include 
    
      <
    
      cstring
    
      >
    
      
#include 
    
      <
    
      cstdio
    
      >
    
      

    
      using
    
       
    
      namespace
    
       std;


    
      char
    
       st[
    
      20
    
      ];


    
      int
    
       main()
{
 
    
      //
    
      freopen("t.txt", "r", stdin);
    
      

    
       gets(st);
 
    
      int
    
       ans 
    
      =
    
       
    
      0
    
      ;
 
    
      int
    
       pos 
    
      =
    
       
    
      0
    
      ;
 
    
      for
    
       (
    
      int
    
       i 
    
      =
    
       
    
      0
    
      ; i 
    
      <
    
       
    
      10
    
      ; i
    
      ++
    
      )
 
    
      if
    
       (st[i] 
    
      ==
    
       
    
      '
    
      ?
    
      '
    
      )
 pos 
    
      =
    
       
    
      10
    
       
    
      -
    
       i;
 
    
      else
    
       
    
      if
    
       (st[i] 
    
      ==
    
       
    
      '
    
      X
    
      '
    
      )
 ans 
    
      +=
    
       
    
      10
    
       
    
      *
    
       (
    
      10
    
       
    
      -
    
       i);
 
    
      else
    
      
 ans 
    
      +=
    
       (st[i] 
    
      -
    
       
    
      '
    
      0
    
      '
    
      ) 
    
      *
    
       (
    
      10
    
       
    
      -
    
       i);
 
    
      for
    
       (
    
      int
    
       i 
    
      =
    
       
    
      0
    
      ; i 
    
      <=
    
       
    
      9
    
      ; i
    
      ++
    
      )
 
    
      if
    
       ((ans 
    
      +
    
       i 
    
      *
    
       pos) 
    
      %
    
       
    
      11
    
       
    
      ==
    
       
    
      0
    
      )
 {
 printf(
    
      "
    
      %d\n
    
      "
    
      , i);
 
    
      return
    
       
    
      0
    
      ;
 }
 
    
      if
    
       ((ans 
    
      +
    
       
    
      10
    
       
    
      *
    
       pos) 
    
      %
    
       
    
      11
    
       
    
      ==
    
       
    
      0
    
       
    
      &&
    
       pos 
    
      ==
    
       
    
      1
    
      )
 {
 printf(
    
      "
    
      X\n
    
      "
    
      );
 
    
      return
    
       
    
      0
    
      ;
 }
 printf(
    
      "
    
      -1\n
    
      "
    
      );
 
    
      return
    
       
    
      0
    
      ;
}