func_code_string: #include<iostream>   typedef long long ll;   using namespace std;      const int maxn =1e5+5;   int n,q;   ll sum[maxn];   string s;      int main() {       cin>>n>>q;       cin>>s;       s =  # +s;       for(int i=1;i<=n;i++) sum[i] = sum[i-1]+s[i]- a +1;       while (q--) {           int l,r;           cin>>l>>r;           cout<<sum[r]-sum[l-1]<<endl;       }       return 0;   }