1804C - Pull Your Luck - CodeForces Solution


brute force math number theory

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C++ Code:

#include <bits/stdc++.h>
using namespace std;

//-------TEMPLATES-------
template<typename... T>
void see(T&... args) { ((cin >> args), ...);}
template<typename... T>
void put(T&&... args) { ((cout << args << " "), ...);}

//--------MACROS---------
#define cpu() ios::sync_with_stdio(false); cin.tie(nullptr)
#define ll long long
#define vi vector<int>
#define pb push_back
#define rep(i,a,b) for (int i=a; i<b; ++i)
#define rev(i,a,b) for (int i=a; i>b; --i)
#define pii pair<int,int>
#define F first
#define S second
#define seea(a,x,y) for(int i=x;i<y;i++){cin>>a[i];}

//-----CONSTANTS------
const ll inf = INT64_MAX;
const ll minf = INT64_MIN;
const ll mod = 1e9+7;
const ll N = 1e5+5;

ll moved(ll f, int x, int n){
  ll temp = (f*(f+1))/2;
  return (temp + x)%n;
}

void solve(){
  int n,x,p;
  cin>>n>>x>>p;
  for(ll i=1;i<=min(2*n,p);i++){
    if (moved(i,x,n)== 0){
      cout<<"Yes\n";
      return;
    }
  }
  cout<<"No\n";
}
    
signed main(){
  cpu();
  int t;
  cin>>t;
  while(t--) solve();
}


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