codeforces313B - Ilya and Queries DP

 1 // File Name: 313b.cpp
 2 // Author: darkdream
 3 // Created Time: 2014年07月24日 星期四 08时02分38秒
 4 
 5 #include<vector>
 6 #include<list>
 7 #include<map>
 8 #include<set>
 9 #include<deque>
10 #include<stack>
11 #include<bitset>
12 #include<algorithm>
13 #include<functional>
14 #include<numeric>
15 #include<utility>
16 #include<sstream>
17 #include<iostream>
18 #include<iomanip>
19 #include<cstdio>
20 #include<cmath>
21 #include<cstdlib>
22 #include<cstring>
23 #include<ctime>
24 
25 using namespace std;
26 char str[100005];
27 int  sum[100005];
28 int main(){
29    scanf("%s",&str[1]);
30    int len = strlen(&str[1]);
31    sum[1] = 0 ; 
32    for(int i =1;i <= len ;i ++)
33    {
34      if(str[i+1] == str[i])
35       {
36         sum[i] = sum[i-1] + 1;  ; 
37       }else{
38         sum[i] = sum[i-1];
39       }
40    }
41    int m ; 
42    scanf("%d",&m);
43    for(int i =1 ;i <= m ;i ++)
44    {
45       int l, r; 
46       scanf("%d %d",&l,&r);
47       printf("%d\n",sum[r-1]- sum[l-1]);
48    }
49 return 0;
50 }