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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. void __print(int x) {cerr << x;}
  4. void __print(long x) {cerr << x;}
  5. void __print(long long x) {cerr << x;}
  6. void __print(unsigned x) {cerr << x;}
  7. void __print(unsigned long x) {cerr << x;}
  8. void __print(unsigned long long x) {cerr << x;}
  9. void __print(float x) {cerr << x;}
  10. void __print(double x) {cerr << x;}
  11. void __print(long double x) {cerr << x;}
  12. void __print(char x) {cerr << '\'' << x << '\'';}
  13. void __print(const char *x) {cerr << '\"' << x << '\"';}
  14. void __print(const string &x) {cerr << '\"' << x << '\"';}
  15. void __print(bool x) {cerr << (x ? "true" : "false");}
  16.  
  17. template<typename T, typename V>
  18. void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
  19. template<typename T>
  20. void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
  21. void _print() {cerr << "]\n";}
  22. template <typename T, typename... V>
  23. void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
  24. #ifndef ONLINE_JUDGE
  25. #define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
  26. #else
  27. #define debug(x...)
  28. #endif
  29. #define endl '\n'
  30. #define ll long long int
  31. #define vi vector<int> 
  32. #define mx(a,b,c,d) max(a, max(b, max(c,d)))
  33. #define MP make_pair
  34. #define pb push_back
  35. #define ppb pop_back
  36. const int md = 1e9 + 7;
  37.  
  38. const ll INF=1e9+15;
  39. const ll NAX= 2e5+5; // change it acc tothe contraints
  40.  
  41.  
  42. void solve()
  43. {
  44.     ll n;
  45.     cin>>n;
  46.     ll num;
  47.     cin>>num;
  48.     ll new_num=num;
  49.     vector<ll> arr;
  50.  
  51.     while(num!=0){
  52.         ll temp=num%10;
  53.         arr.pb(temp);
  54.         num/=10;
  55.         break;
  56.     }
  57.  //   debug(arr);
  58.     vector<string>numbers;
  59.     string str_9=" ";
  60.     for(int i=0; i<n; i++){
  61.         numbers.pb("9");
  62.         str_9+=numbers[i];
  63.         //debug(arr,str_9, numbers);
  64.     }
  65.     ll num_9=stoll(str_9);
  66.     if(arr[0]!=9){
  67.         cout<<num_9-new_num<<endl;;
  68.         return;
  69.     }
  70.     else{
  71.         numbers.clear();
  72.         string str_1=" ";
  73.         ll num_1;
  74.         for(int i=0; i<n-1; i++){
  75.             numbers.pb("1");
  76.             str_1+=numbers[i];
  77.         }
  78.         str_1+="2";
  79.         num_1=stoll(str_1);
  80.         cout<<num_1<<endl;
  81.         //debug(str_1, num_1, numbers);
  82.         return;
  83.  
  84.     }
  85.  
  86. }
  87. int main() {
  88.  
  89.      ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  90.  
  91. int tc=1;
  92.     cin>>tc;
  93.     for (int i=0; i<tc; i++){
  94. 		solve();
  95. 		//cerr << "time taken : " << (float)clock() / CLOCKS_PER_SEC << " secs" << endl;
  96.  
  97. 		}
  98.  
  99.  
  100.  
  101. }
  102.  
  103.  
  104.  
Runtime error #stdin #stdout #stderr 0.01s 5408KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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terminate called after throwing an instance of 'std::out_of_range'
  what():  stoll
https://ideone.com/bamalP
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
secret

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