| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 1202537 | browntoad | Finding Routers (IOI20_routers) | C++20 | 0 ms | 0 KiB |
#include <bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template<typename T>
using pbds_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#define ll long long
// #define int ll
#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define REP(i, n) FOR(i, 0, n)
#define RREP(i, n) for (int i = (n)-1; i >= 0; i--)
#define RREP1(i, n) for (int i = (n); i >= 1; i--)
#define REP1(i, n) FOR(i, 1, n+1)
#define pii pair<int, int>
#define ppi pair<pii, int>
#define pip pair<int, pii>
#define f first
#define s second
#define pb push_back
#define ALL(x) (x).begin(), (x).end()
#define SZ(x) (int)((x).size())
#define endl '\n'
#define IOS() ios::sync_with_stdio(false), cin.tie(0), cout.tie(0)
const ll maxn = 2e6+5;
const ll mod = 998244353;
const ll inf = (1ll<<60);
const int iinf = 1e9+5;
ll pw(ll x, ll p, ll m){
ll ret = 1;
x %= m;
while(p > 0){
if (p & 1){
ret *= x;
ret %= m;
}
x *= x;
x %= m;
p >>= 1;
}
return ret;
}
ll inv(ll x, ll m){
return pw(x, m-2, m);
}
signed main(){
// consider a binary tree, the number of queries approx = union of all the chosen leaves to their parents's nodes
int toad = 17;
int cnt = 0;
int n = 1000;
n--; cnt += toad;
toad--;
int pw = 1;
while(n > 0){
int sub = min(n, pw);
cnt += toad * sub;
n -= sub;
pw *= 2;
toad--;
}
cout<<cnt<<endl;
}