Problems
Раздел клада
include <bits/stdc++.h>
using namespace std; int main (){ long long a,b,c,n,cem=0,say=0; cin>>n>>a; for(long long i=1;i<=n-a;i++) { cem+=i; say++; if(cem==n-a) { cout<<say; break; } } }
include <bits/stdc++.h>
define ll unsigned long long
using namespace std; int main() { ll n,m,x; cin>>n>>m; x=(n-m)*2; for(int i=1;i<=x;i++){ if(i*(i+1)==x){ cout<<i; } } }