poj1260

dp

View Code

   
     

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

    
      using
    
       
    
      namespace
    
       std;


    
      #define
    
       maxn 106
    
      


    
      struct
    
       Pearl
{
 
    
      int
    
       num, p;
}pearl[maxn];


    
      int
    
       n, f[maxn];


    
      void
    
       input()
{
 scanf(
    
      "
    
      %d
    
      "
    
      , 
    
      &
    
      n);
 
    
      for
    
       (
    
      int
    
       i 
    
      =
    
       
    
      0
    
      ; i 
    
      <
    
       n; i
    
      ++
    
      )
 scanf(
    
      "
    
      %d%d
    
      "
    
      , 
    
      &
    
      pearl[i].num, 
    
      &
    
      pearl[i].p);
}


    
      void
    
       work()
{
 
    
      int
    
       sum;
 f[n] 
    
      =
    
       
    
      0
    
      ;
 
    
      for
    
       (
    
      int
    
       i 
    
      =
    
       n 
    
      -
    
       
    
      1
    
      ; i 
    
      >=
    
       
    
      0
    
      ; i
    
      --
    
      )
 {
 sum 
    
      =
    
       
    
      0
    
      ;
 f[i] 
    
      =
    
       
    
      0x3f3f3f3f
    
      ;
 
    
      for
    
       (
    
      int
    
       j 
    
      =
    
       i; j 
    
      <
    
       n; j
    
      ++
    
      )
 {
 sum 
    
      +=
    
       pearl[j].num;
 f[i] 
    
      =
    
       min(f[i], (sum 
    
      +
    
       
    
      10
    
      ) 
    
      *
    
       pearl[j].p 
    
      +
    
       f[j 
    
      +
    
       
    
      1
    
      ]);
 }
 }
}


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

    
       
    
      int
    
       t;
 scanf(
    
      "
    
      %d
    
      "
    
      , 
    
      &
    
      t);
 
    
      while
    
       (t
    
      --
    
      )
 {
 input();
 work();
 printf(
    
      "
    
      %d\n
    
      "
    
      , f[
    
      0
    
      ]);
 }
 
    
      return
    
       
    
      0
    
      ;
}