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  1. #include<unordered_map>
  2. #include<unordered_set>
  3. #include<functional>
  4. #include<algorithm>
  5. #include<iostream>
  6. #include<hash_map>
  7. #include<iterator>
  8. #include<iomanip>
  9. #include<numeric>
  10. #include<cstring>
  11. #include<vector>
  12. #include<string>
  13. #include<deque>
  14. #include<stack>
  15. #include<queue>
  16. #include<array>
  17. #include<cmath>
  18. #include<list>
  19. #include<map>
  20. #include<set>
  21. using namespace std;
  22. typedef long long ll;
  23. typedef unsigned long long ull;
  24. typedef double db;
  25. #define pii pair<int,int>
  26. #define pll pair<ll,ll>
  27. #define inf INT32_MAX
  28. #define linf INT64_MAX
  29. #define pf push_front
  30. #define pb push_back
  31. #define ppb pop_back
  32. #define ppf pop_front
  33. #define ff first
  34. #define ss second
  35. const int mod=1e9+7,N=5e5+5;
  36. int main(){
  37. //ios_base::sync_with_stdio(false);
  38. //cin.tie(nullptr);
  39. //cout.tie(nullptr);
  40.  
  41. int q;
  42. string s;
  43. vector<set<int>>v(26);
  44. cin>>s>>q;
  45. for(int i=0;i<s.size();++i)
  46. v[s[i]-'a'].insert(i);
  47. for(;q;--q){
  48. char z;
  49. int x,y,zz;
  50. cin>>x>>y;
  51. y--;
  52. if(x==1){
  53. cin>>z;
  54. v[s[y]-'a'].erase(y);
  55. v[z-'a'].insert(y);
  56. s[y]=z;
  57. }else{
  58. cin>>zz;
  59. int cnt=0;
  60. for(auto i:v){
  61. if(i.empty())continue;
  62. auto tmp=i.lower_bound(y);
  63. if(tmp!=i.end()&&*tmp<=zz-1){
  64. //cout<<"TMP:"<<*tmp<<'\n';
  65. cnt++;
  66. }
  67. }
  68. cout<<cnt<<'\n';
  69. }
  70. }
  71. }
Runtime error #stdin #stdout 0.01s 4532KB
stdin
Standard input is empty
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