Submission #147776

#	Time	Username	Problem	Language	Result	Execution time	Memory
147776		karma	Gondola (IOI14_gondola)	C++14	90 / 100	24 ms	2532 KiB

gondola

#include <bits/stdc++.h>
#include "gondola.h"
#define pb      emplace_back
#define fi      first
#define se      second

using namespace std;

const int N = int(3e5) + 2;
const int M = int(1e6) + 1;
const int mod = int(1e9) + 9;

int dem[N];
bitset<M> vis;

int valid(int n, int p[])
{
    int mn = 0, res = -1;
    for(int i = 0; i < n; ++i) {
        if(p[mn] > p[i]) mn = i;
        if(++dem[p[i]] > 1) res = 0;
    }
    if(p[mn] > n && res == -1) res = 1;
    for(int i = mn, lim = mn + n; i < lim; ++i) {
        --dem[p[i % n]];
        if(p[i % n] > n || res != -1) continue;
        if(p[i % n] - p[mn] != i - mn) res = 0;
    }
    if(res == -1) res = 1;
    return res;
}

typedef pair<int, int> pii;
int replacement(int n, int p[], int res[])
{
    int mn = 0, cnt = 0;
    vector<int> org(n);
    vector<pii> v;
    for(int i = 0; i < n; ++i) {
       if(p[mn] > p[i]) mn = i;
       if(p[i] > n) v.pb(i, p[i]);
    }
    sort(v.begin(), v.end(), [](const pii& x, const pii& y){
            return x.se < y.se;
         });
    for(int i = mn, lim = mn + n; i < lim; ++i) {
       if(p[mn] > n) org[i - mn] = i - mn + 1;
       else org[i % n] = (p[mn] + i - mn - 1) % n + 1;
    }
    mn = n + 1;
    for(pii x: v) {
        res[cnt ++] = org[x.fi];
        while(mn < x.se) res[cnt ++] = mn ++;
        mn = x.se + 1;
    }
    return cnt;
}

int countReplacement(int n, int p[])
{
    if(!valid(n, p)) return 0;
    int mx = 0, cnt = 0, res = 1;
    vis.reset();
    for(int i = 0; i < n; ++i) {
        mx = max(p[i], mx);
        if(p[i] > n) ++cnt, vis.set(p[i]);
    }
    if(*min_element(p, p + n) > n) res = n;
    for(int i = n + 1; i <= mx; ++i) {
        if(vis.test(i)) --cnt, vis.flip(i);
        else res = 1ll * res * cnt % mod;
    }
    return res;
}
//
//int n, a[N], cmd, res[N];
//
//int main()
//{
//    ios_base::sync_with_stdio(0);
//    cin.tie(0), cout.tie(0);
//    if(fopen("test.inp", "r")) {
//        freopen("test.inp", "r", stdin);
//        freopen("test.out", "w", stdout);
//    }
//    int nTest;
//    cin >> nTest;
//    while(nTest --) {
//        cin >> cmd >> n;
//        for(int i = 0; i < n; ++i) cin >> a[i];
//        if(cmd == 1) cout << valid(n, a) << '\n';
//        else if(cmd == 2) {
//            int sz = replacement(n, a, res);
//            for(int i = 0; i < sz; ++i) cout << res[i] << ' ';
//            cout << '\n';
//        } else cout << countReplacement(n, a) << '\n';
//    }
//}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 10 / 10
• Subtask 6: 20 / 20
• Subtask 7: 5 / 5
• Subtask 8: 15 / 15
• Subtask 9: 15 / 15
• Subtask 10: 0 / 10