Submission #1101065

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101065		Kirill22	Permutation Recovery (info1cup17_permutation)	C++17	43 / 100	4064 ms	2764 KiB

Main

#include "bits/stdc++.h"

using namespace std;

vector<int> mods;
struct Int {
    vector<int> val;

    Int(string s = "") {
        for (auto& mod : mods) {
            int ans = 0;
            for (auto& c : s) {
                ans = (ans * 10ll + c - '0') % mod;
            }
            val.push_back(ans);
        }
    }

    Int& operator+=(const Int& other) {
        for (int i = 0; i < (int) mods.size(); i++) {
            val[i] += other.val[i];
            if (val[i] >= mods[i]) {
                val[i] -= mods[i];
            }
        }
        return *this;
    }

    Int& operator-=(const Int& other) {
        for (int i = 0; i < (int) mods.size(); i++) {
            val[i] -= other.val[i];
            if (val[i] < 0) {
                val[i] += mods[i];
            }
        }
        return *this;
    }

    bool operator==(const Int& other) const {
        return val == other.val;
    }
};

void solve() {
    mods = {998244353};
    // mods = {(int) 1e9 + 7, 998244353, (int) 1e9 + 13};
    int n;
    cin >> n;
    vector<Int> a(n);
    for (int i = 0; i < n; i++) {
        string s;
        cin >> s;
        a[i] = Int(s);
    }
    for (int i = n - 1; i; i--) {
        a[i] -= a[i - 1];
    }
    vector<int> ord = {0};
    Int all("1");
    for (int i = 1; i < n; i++) {
        all += a[i - 1];
        Int tmp = all;
        ord.push_back(i);
        if (a[i] == tmp) {
            continue;
        }
        for (int j = i - 1; j >= 0; j--) {
            tmp -= a[ord[j]];
            if (a[i] == tmp) {
                int pos = i;
                while (pos != j) {
                    swap(ord[pos - 1], ord[pos]);
                    pos--;
                }
                break;
            }
        }
    }
    vector<int> ans(n);
    for (int i = 0; i < n; i++) {
        ans[ord[i]] = i;
//        root = nxt[root];
    }
    for (int i = 0; i < n; i++) {
        cout << ans[i] + 1 << " ";
    }
    cout << '\n';
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t = 1;
//    cin >> t;
    while (t--) {
        solve();
    }
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 18 / 18
• Subtask 4: 0 / 17
• Subtask 5: 0 / 11
• Subtask 6: 0 / 7
• Subtask 7: 0 / 16
• Subtask 8: 0 / 6