Submission #1033119

#	Time	Username	Problem	Language	Result	Execution time	Memory
1033119		c2zi6	Gondola (IOI14_gondola)	C++14	75 / 100	26 ms	5580 KiB

gondola

#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
#define mkp(a, b) make_pair(a, b)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef vector<VI> VVI;
typedef vector<VVI> VVVI;
typedef vector<VPI> VVPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
typedef vector<VL> VVL;
typedef vector<VVL> VVVL;
typedef vector<VPL> VVPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<class T>
using indset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#include "gondola.h"

int valid(int n, int inputSeq[]) {
    VI a;
    rep(i, n) {
        if (inputSeq[i] <= n) {
            int start = i - inputSeq[i] + 1;
            if (start < n) start += n;
            replr(i, start, start+n-1) a.pb(inputSeq[i%n]);
            break;
        }
    }
    if (a.size() == 0) {
        rep(i, n) a.pb(inputSeq[i]);
    }
    set<int> st;
    for (int x : a) st.insert(x);
    if (st.size() != a.size()) return false;
    rep(i, n) {
        if (a[i] <= n) {
            if (a[i] != i+1) return false;
        }
    }
    return true;
}

//----------------------

int replacement(int n, int inputSeq[], int replacementSeq[]) {
    VI a;
    rep(i, n) {
        if (inputSeq[i] <= n) {
            int start = i - inputSeq[i] + 1;
            if (start < n) start += n;
            replr(i, start, start+n-1) a.pb(inputSeq[i%n]);
            break;
        }
    }
    if (a.size() == 0) {
        rep(i, n) a.pb(inputSeq[i]);
    }
    for (int& x : a) x--;
    int mx = 0;
    VI idx(250'000, -1);
    rep(i, n) {
        setmax(mx, a[i]);
        idx[a[i]] = i;
    }
    VI ans;

    map<int, int> cur;
    rep(i, n) if (idx[i] == -1) {
        cur[i] = i;
    }

    replr(i, n, mx) {
        if (idx[i] == -1) {
            auto it = cur.begin();
            ans.pb(it->ss);
            it->ss = i;
        } else {
            auto it = cur.lower_bound(idx[i]);
            ans.pb(it->ss);
            it->ss = i;
            cur.erase(it);
        }
    }
    rep(i, ans.size()) replacementSeq[i] = ans[i]+1;
    return ans.size();
}

//----------------------

const ll MOD = 1e9 + 9;
int countReplacement(int n, int inputSeq[]) {
    VI a;
    rep(i, n) {
        if (inputSeq[i] <= n) {
            int start = i - inputSeq[i] + 1;
            if (start < n) start += n;
            replr(i, start, start+n-1) a.pb(inputSeq[i%n]);
            break;
        }
    }
    if (a.size() == 0) {
        rep(i, n) a.pb(inputSeq[i]);
    }
    set<int> st;
    for (int x : a) st.insert(x);
    if (st.size() != a.size()) return 0;
    rep(i, n) if (a[i] <= n && a[i] != i+1) return 0;
    for (int& x : a) x--;
    int mx = 0;
    rep(i, n) setmax(mx, a[i]);
    VI ka(mx+1);
    ll cur = 0;
    rep(i, n) {
        ka[a[i]] = true;
        if (a[i] >= n) cur++;
    }
    ll ans = 1;
    replr(i, n, mx) {
        if (ka[i]) cur--;
        else {
            ans *= cur;
            ans %= MOD;
        }
    }

    return ans;
}

• 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: 0 / 15
• Subtask 10: 0 / 10