oj.uz

Submission #468802

# Submission time Handle Problem Language Result Execution time Memory
468802 2021-08-29T17:43:44 Z errorgorn CONSUL (info1cup19_consul) C++17
100 / 100
 33 ms 200 KB 
//雪花飄飄北風嘯嘯
//天地一片蒼茫

#include "grader.h"
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ii,ll>
#define fi first
#define se second
#define endl '\n'
#define debug(x) cout << #x << ": " << x << endl

#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
#define lb lower_bound
#define ub upper_bound

#define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()

#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
//change less to less_equal for non distinct pbds, but erase will bug

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

const int MOD=998244353;

ll qexp(ll b,ll p,int m){
    ll res=1;
    while (p){
        if (p&1) res=(res*b)%m;
        b=(b*b)%m;
        p>>=1;
    }
    return res;
}

ll inv(ll i){
	return qexp(i,MOD-2,MOD);
}

ll fix(ll i){
	i%=MOD;
	if (i<0) i+=MOD;
	return i;
}

ll fac[1000005];
ll ifac[1000005];

ll nCk(int i,int j){
	if (i<j) return 0;
	return fac[i]*ifac[j]%MOD*ifac[i-j]%MOD;
}

void solve(int n){
	vector<int> v;
	rep(x,1,n+1) v.pub(x);
	shuffle(all(v),rng);
	
	rep(x,0,min(n,n<=50?25:30)){
		int pos=kth(v[x]);
		if (cnt(pos)>n/3){
			say_answer(pos);
			return;
		}
	}
	
	say_answer(-1);
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 200 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 200 KB Output is correct
2 Correct 9 ms 200 KB Output is correct

Subtask #3
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 200 KB Output is correct
2 Correct 24 ms 200 KB Output is correct
3 Correct 11 ms 200 KB Output is correct
4 Correct 9 ms 200 KB Output is correct
5 Correct 24 ms 200 KB Output is correct
6 Correct 33 ms 200 KB Output is correct
7 Correct 23 ms 200 KB Output is correct
8 Correct 25 ms 200 KB Output is correct
9 Correct 16 ms 200 KB Output is correct
10 Correct 25 ms 200 KB Output is correct
11 Correct 31 ms 200 KB Output is correct
12 Correct 32 ms 200 KB Output is correct
13 Correct 26 ms 200 KB Output is correct
14 Correct 30 ms 200 KB Output is correct