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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int              long long int
  4. #define double           long double
  5. #define print(a)         for(auto x : a) cout << x << " "; cout << endl
  6. inline int power(int a, int b) {
  7.     int x = 1;
  8.     while (b) {
  9.         if (b & 1) x *= a;
  10.         a *= a;
  11.         b >>= 1;
  12.     }
  13.     return x;
  14. }
  15.  
  16.  
  17. const int M = 1000000007;
  18. const int N = 3e5+9;
  19. const int INF = 2e9+1;
  20. const int LINF = 2000000000000000001;
  21.  
  22. //_ ***************************** START Below *******************************
  23.  
  24. vector<int> a;
  25. vector<int> b;
  26.  
  27. bool isPossible(int n, int mid){
  28.  
  29. 	int ct = 0;
  30. 	int rem = mid;
  31.  
  32. 	for(int i=0; i<n; i++){
  33. 		if(a[i] >= rem-1 && b[i] >= ct){
  34. 			rem--;
  35. 			ct++;
  36. 		}	
  37. 	}
  38.  
  39. 	return ct >= mid;
  40.  
  41. }
  42.  
  43. int consistency(int n){
  44.  
  45. 	int s = 0, e = INF;
  46.  
  47. 	while(s<e){
  48. 		int mid = s + (e-s+1)/2;
  49. 		if(isPossible(n, mid)){
  50.             s = mid;
  51. 		}
  52. 		else e = mid-1;
  53. 	}
  54.  
  55. 	return e;
  56.  
  57. }
  58.  
  59.  
  60.  
  61.  
  62.  
  63.  
  64.  
  65.  
  66.  
  67.  
  68.  
  69. void solve() {
  70.  
  71.     int n;
  72.     cin>>n;
  73.  
  74.     a.resize(n);
  75.     b.resize(n);
  76.     for(int i=0; i<n; i++){
  77.         cin >> a[i] >> b[i];
  78.     }
  79.  
  80.     cout << consistency(n) << endl;
  81.  
  82.  
  83. }
  84.  
  85.  
  86.  
  87.  
  88.  
  89. int32_t main() {
  90.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  91.  
  92.     int t = 1;
  93.     cin >> t;
  94.     while (t--) {
  95.         solve();
  96.     }
  97.  
  98.     return 0;
  99. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/EBM7om
language:
C++14 (gcc 8.3)
created:
7 hours ago
visibility:
public

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