title: Number Substrings String
signature: int numberSubstringsString(string str) {
test_code: #include <algorithm>
  #include <assert.h>
  #include <cstdlib>
  #include <iostream>
  #include <map>
  #include <set>
  #include <string>
  #include <tuple> 
  #include <unordered_map>
  #include <vector>
  #include <math.h>
  #include <cmath>
  #include <bits/stdc++.h>
  #include <numeric>
  #include <functional>
  
  using namespace std;
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  bool validateSolution(int actual, int expected){
      return actual == expected;
  }
  
  string driver(string str, int expected){
      try
      {
          if (validateSolution(PLACEHOLDER_FN_NAME(str), expected)){
              return "PASSED";
          }
          return "FAILED";
      }
      catch (const std::overflow_error& exception_obj)
      {
          return typeid(exception_obj).name();
      }
      catch (const std::runtime_error& exception_obj)
      {
          return typeid(exception_obj).name();
      }
      catch (const std::exception& exception_obj)
      {
          return typeid(exception_obj).name();
      }
      catch (...)
      {
          return "UNK_ERROR";
      }
  }
  
  int main() {
      string result = "";
  
      result = driver("gZFGZsHCimLf", 78); 
      cout << "TEST-" << 0 << "..."
           <<  result
           << "\n";
  
      result = driver("505357", 21); 
      cout << "TEST-" << 1 << "..."
           <<  result
           << "\n";
  
      result = driver("011011101", 45); 
      cout << "TEST-" << 2 << "..."
           <<  result
           << "\n";
  
      result = driver("ovfwP Osauz", 66); 
      cout << "TEST-" << 3 << "..."
           <<  result
           << "\n";
  
      result = driver("92132238746026", 105); 
      cout << "TEST-" << 4 << "..."
           <<  result
           << "\n";
  
      result = driver("01100", 15); 
      cout << "TEST-" << 5 << "..."
           <<  result
           << "\n";
  
      result = driver("RaOWYQRfiWKSyC", 105); 
      cout << "TEST-" << 6 << "..."
           <<  result
           << "\n";
  
      result = driver("861330202", 45); 
      cout << "TEST-" << 7 << "..."
           <<  result
           << "\n";
  
      result = driver("001100010", 45); 
      cout << "TEST-" << 8 << "..."
           <<  result
           << "\n";
  
      result = driver("uvpKlGUBLOMba", 91); 
      cout << "TEST-" << 9 << "..."
           <<  result
           << "\n";
  
      return 0;
  }
source_py: def number_substrings_string(str):
      n = len(str)
      return int(((n * (n + 1)) / 2))
source_cpp: int number_substrings_string(string str) {
    int n = str . length ( );
    return n * ( n + 1 ) / 2;
  }