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  1. #include <bits/stdc++.h>
  2. #include <string.h>
  3. using namespace std;
  4. #define ll long long
  5.  
  6. int main() {
  7. 	int t;
  8. 	cin>>t;
  9. 	while(t--){
  10. 		ll r,l;cin>>l>>r;
  11. 		ll n=sqrt(2*(r-l));
  12. 		while(n && n*(n+1)>2*(r-l)){n--;}
  13. 		cout<<n+1<<endl;
  14.  
  15.  
  16.  
  17. 	}return 0;
  18. }
Success #stdin #stdout 0.01s 5280KB
comments (?)
stdin
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5
1 2
1 5
2 2
10 20
1 1000000000
stdout
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2
3
1
5
44721
https://ideone.com/nda7ZV
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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