Submission #891955

#	Time	Username	Problem	Language	Result	Execution time	Memory
891955		Macker	Archery (IOI09_archery)	C++17	17 / 100	2103 ms	7068 KiB

archery

#include <bits/stdc++.h>
 
using namespace std;
typedef long long ll;
#define all(v) v.begin(), v.end()
 
//#pragma GCC optimize("Ofast")
//#pragma GCC target("avx2")

int main()
{
    int n, r; cin >> n >> r;
    int me; cin >> me;
    vector<int> nv(2 * n - 1);
    for (auto &i : nv) {
        cin >> i;
    }
    nv.push_back(me);

    int mnp = -1;
    int mns = INT_MAX;
    for (int i = 2 * n - 1; i > 0; i--) {
        int mn = 0, mx = INT_MAX;
        vector<int> v = nv;
        int p = r;
        while(mn < mx){
            mn = INT_MAX;
            mx = 0;
            for (int j = 1; j < n; j++) {
                mn = min(mn, max(v[2 * j], v[2 * j + 1]));
                mx = max(mx, min(v[2 * j], v[2 * j + 1]));
            }
            if(v[0] != 1) mn = 0;

            if(mn > mx) break;
            
            vector<int> tv(2 * n);
            if(v[0] > v[1]) swap(v[0], v[1]);
            tv[0] = v[0];
            tv[2 * n - 1] = v[1];
            for (int j = 1; j < n; j++) {
                int& s = v[2 * j], &b = v[2 * j + 1];
                if(s < b) swap(s, b);
                tv[2 * j] = s;
                tv[2 * j - 1] = b;
            }
            v = tv;
            p--;
        }
        
        if(me > n) p = 0;
        for (int j = 0; j < 2 * n; j++) {
            if(v[j] == me){
                if((j / 2 - p + p * n) % n < mns){
                    mns = (j / 2 - p + p * n) % n;
                    mnp = i / 2 + 1;
                }
                break;
            }
        }
        
        swap(nv[i], nv[i - 1]);
    }
    
    cout << mnp << endl;
}

• Subtask 1: 3 / 6
• Subtask 2: 14 / 94