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  1. #include <bits/stdc++.h>
  2. #include <ext/pb_ds/assoc_container.hpp>
  3. using namespace __gnu_pbds;
  4. #define FAST ios::sync_with_stdio(0), cin.tie(0),cout.tie(0)
  5. #define ll long long
  6. #define ld long double
  7. #define int long long
  8. #define endl "\n"
  9. #define yes cout<<"YES"<<endl;
  10. #define no cout<<"NO"<<endl;
  11. #define pb push_back
  12. //#pragma GCC optimize("O3,unroll-loops")
  13. //#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
  14. using namespace std;
  15. const int MOD = 1e9+7  ;
  16. //const int MOD = 998244353  ;
  17. const int N = 1e5+5  ;
  18. const ll INF = 1e18 ;
  19. const ll MIN = -1e18 ;
  20. typedef tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update> indexed_set;
  21.  
  22.  
  23. void solve() {
  24.     ll v1,v2,v3,d;cin>>v1>>v2>>v3>>d;
  25.     ll t=d*v3;
  26.     ll q=v1+v2;
  27.     cout<<fixed<<setprecision(6)<<(ld)t/q<<endl;
  28. }
  29.  
  30. signed main() {
  31.     FAST;
  32.     #ifndef ONLINE_JUDGE
  33.         freopen("input.txt","r",stdin);
  34.         freopen("output.txt","w",stdout);
  35.     #endif
  36.     ll t=1;
  37.     cin>>t;
  38.     while(t--) solve();
  39. }
  40.  
  41.  
  42.  
Success #stdin #stdout 0.01s 5288KB
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29131.786485
https://ideone.com/pEv7Ub
language:
C++14 (clang 8.0)
created:
38 days ago
visibility:
public

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