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  1. #include <iostream>
  2. #include <iomanip>
  3. #include <string>
  4. #include <sstream>
  5. #include <vector>
  6. #include <map>
  7. #include <algorithm>
  8. using namespace std;
  9.  
  10.  
  11. string add(string n1,string n2){
  12.     string result = "";
  13.  
  14.     int carry = 0;
  15.  
  16.     if (n1.size() < n2.size()) {
  17.         swap(n1, n2);
  18.     }
  19.  
  20.     int size1 = n1.size();
  21.     int size2 = n2.size();
  22.  
  23.     for (int i = 0; i < size1; i++) {
  24.         int digit1 = n1[size1 - 1 - i] - '0';
  25.         int digit2 = (i < size2) ? n2[size2 - i - 1]-'0' : 0;
  26.  
  27.         int sum = digit1 + digit2 + carry;
  28.  
  29.         carry = sum / 10;
  30.  
  31.         result = result + to_string(sum % 10);
  32.     }
  33.  
  34.     if (carry != 0) {
  35.         result = result + to_string(carry);
  36.     }
  37.  
  38.     reverse(result.begin(), result.end());
  39.  
  40.     return result;
  41. }
  42.  
  43. int main() {
  44.  
  45.     int query; cin >> query;
  46.  
  47.     for (int i = 1; i <= query; i++) {
  48.         string n1; cin >> n1;
  49.         string n2; cin >> n2;
  50.  
  51.         string result = add(n1, n2);
  52.         cout << result << endl;
  53.     }
  54.  
  55.  
  56.  
  57.     return 0;
  58. }
  59.  
Success #stdin #stdout 0.01s 5324KB
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https://ideone.com/acsUqL
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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