Codeforces Beta Round #1

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A

#include<iostream>
#include<cstdio>
using namespace std;

long long  n , m , a;

int main(){
   long long  sum;
   while(cin>>n>>m>>a){
      long long x , y;
      x = n%a == 0 ? n/a : n/a+1;
      y = m%a == 0 ? m/a : m/a+1;
      sum = x*y;
      cout<<sum<<endl;
   }
   return 0;
}

B

#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cstring>
#include<cmath>
using namespace std;

#define MAXN 200
int n;

int main(){

   char str[MAXN] , tmp[MAXN];
   char c1 , c2 , c3 , c4;
   int x , y;
   scanf("%d" , &n);

   while(n--){
      scanf("%s" , str);

      int len = strlen(str);
      int mark = 0;

      for(int i = 1 ; i < len ; i++){
         if(isdigit(str[i]) && isalpha(str[i-1]))
           mark++;
      }

      if(mark == 2){

        sscanf(str , "R%dC%d" , &y , &x);

        int pos = 0;
        while(x){
           int num = (x-1)%26;
           tmp[pos++] = num+'A';
           x = (x-1)/26;
        }
        for(pos-- ; pos >= 0 ; pos--)
           printf("%c" , tmp[pos]);
        printf("%d\n" , y);

      }
      else{
        int i;
        x = y = 0;

        for(int i = 0 ; i < len ; i++){
           if(isdigit(str[i]))
              y = y*10+str[i]-'0';
           else
              x = x*26+(str[i]-'A'+1);
        }
        printf("R%dC%d\n" , y , x);
      }
   }
   return 0;
}