Submission #1346414

#TimeUsernameProblemLanguageResultExecution timeMemory
13464144o2aZagi (COCI25_zagi)C++20
81 / 110
3095 ms92220 KiB
#include <bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define _F "what"
using namespace std;
typedef long long ll;

constexpr int N = 1e5 + 67, M = 33, INF = 1e9 + 67;

pair<int, int> f[N][M], g[N][M];
int n, q, pfx[N][M], lf[N][M], rt[N][M], a[N], idf[M], idl[M];
bool mark[M];
deque<int> idx[M];
set<int> curf, curl;

void solve()
{
    int n, q; cin>>n>>q;
    for (int i = 1; i <= n; ++i)
        cin>>a[i];
    fill(rt[n+1]+1, rt[n+1]+M, n+1);
    for (int i = n; i >= 1; --i)
    {
        for (int j = 1; j < M; ++j)
            rt[i][j] = rt[i+1][j];
        rt[i][a[i]] = i;
    }
    for (int i = 1; i <= n; ++i)
    {
        for (int j = 1; j < M; ++j)
            lf[i][j] = lf[i-1][j];
        lf[i][a[i]] = i;
    }
    for (int i = 1; i <= n; ++i)
        f[i][0] = {i-1, 0}, g[i][0] = {i+1, 0};
    for (int j = 1; j < M; ++j)
    {
        int r = 0;
        for (int i = 1; i <= n; ++i)
        {
            while (r < n && (idx[a[r+1]].size() > 0 || curf.size() < j))
            {
                ++r;
                if (idx[a[r]].size() > 0)
                    curl.erase(idx[a[r]].back());
                curl.insert(r);
                idx[a[r]].pb(r);
                if (idx[a[r]].size() == 1)
                    curf.insert(r);
            }
            if (curf.size() < j)
            {
                curf.clear(), curl.clear();
                for (int h = 1; h < M; ++h)
                    idx[h].clear();
                break;
            }
            int h = -1;
            for (int id: curf)
                idf[a[id]] = ++h;
            for (int id: curl)
                idl[a[id]] = h--;
            for (int x = 1; x < M; ++x)
                if (idx[x].size() > 0)
                {
                    int s = (f[i][idf[x]].se)^(pfx[lf[r][x]][x]^pfx[rt[i][x]][x])^(g[r][idl[x]].se);
                    if (s < M)
                        mark[s] = true;
                }
            int s = 0;
            for (; s < M; ++s)
                if (!mark[s])
                    break;
            fill(mark, mark+M, false);
            f[i][j] = {r, s};
            int k = idx[a[i]].front();
            idx[a[i]].pop_front();
            curf.erase(k), curl.erase(k);
            if (idx[a[i]].size() > 0)
                curf.insert(idx[a[i]].front());
        }
        int l = n+1;
        for (int i = n; i >= 1; --i)
        {
            while (l > 1 && (idx[a[l-1]].size() > 0 || curf.size() < j))
            {
                --l;
                if (idx[a[l]].size() > 0)
                    curf.erase(idx[a[l]].front());
                curf.insert(l);
                idx[a[l]].push_front(l);
                if (idx[a[l]].size() == 1)
                    curl.insert(l);
            }
            if (curl.size() < j)
            {
                curf.clear(), curl.clear();
                for (int h = 1; h < M; ++h)
                    idx[h].clear();
                break;
            }
            int h = -1;
            for (int id: curf)
                idf[a[id]] = ++h;
            for (int id: curl)
                idl[a[id]] = h--;
            for (int x = 1; x < M; ++x)
                if (idx[x].size() > 0)
                {
                    int s = (f[l][idf[x]].se)^(pfx[lf[i][x]][x]^pfx[rt[l][x]][x])^(g[i][idl[x]].se);
                    if (s < M)
                        mark[s] = true;
                }
            int s = 0;
            for (; s < M; ++s)
                if (!mark[s])
                    break;
            fill(mark, mark+M, false);
            g[i][j] = {l, s};
            int k = idx[a[i]].back();
            idx[a[i]].pop_back();
            curf.erase(k), curl.erase(k);
            if (idx[a[i]].size() > 0)
                curl.insert(idx[a[i]].back());
        }
        for (int x = 1; x < M; ++x)
        {
            int pre = 1, k = 0;
            for (int i = 1; i <= n; ++i)
            {
                if (a[i] == x)
                {
                    pfx[i][x] = pfx[i-1][x];
                    if (i < n && a[i+1] != x)
                    {
                        fill(mark+1, mark+M, false);
                        mark[a[i+1]] = true;
                        pre = i+1;
                        k = 0;
                    }
                }
                else if (i == n || !mark[a[i+1]])
                {
                    pfx[i][x] = pfx[pre-1][x]^(f[pre][++k].se);
                    if (i < n)
                        mark[a[i+1]] = true;
                }
            }
            fill(mark+1, mark+M, false);
        }
    }
//    for (int j = 1; j <= 4; ++j)
//    {
//        for (int i = 1; i <= n; ++i)
//            cout<<f[i][j].se<<" ";
//        cout<<endl;
//    }
//    cout<<endl;
//    for (int j = 1; j <= 4; ++j)
//    {
//        for (int i = 1; i <= n; ++i)
//            cout<<g[i][j].se<<" ";
//        cout<<endl;
//    }
//    cout<<endl;
//    for (int j = 1; j <= 4; ++j)
//    {
//        for (int i = 1; i <= n; ++i)
//            cout<<pfx[i][j]<<" ";
//        cout<<endl;
//    }
//    cout<<endl;
    while (q--)
    {
        int l, r; cin>>l>>r;
        bool flag = false;
        for (int x = 1; x < M; ++x)
            if (rt[l][x] <= r)
            {
                int a = rt[l][x], b = lf[r][x];
                int s = pfx[b][x]^pfx[a][x];
                for (int j = 0; j < M; ++j)
                    if (f[l][j].fi == a-1)
                    {
                        s ^= f[l][j].se;
                        break;
                    }
                for (int j = 0; j < M; ++j)
                    if (g[r][j].fi == b+1)
                    {
                        s ^= g[r][j].se;
                        break;
                    }
                if (s == 0)
                    flag = true;
            }
        cout<<(flag ? "Toni\n" : "Jakov\n");
    }
}

int main()
{
    if (fopen(_F".INP", "r"))
    {
        freopen(_F".INP", "r", stdin);
        freopen(_F".OUT", "w", stdout);
    }
    else if (fopen("test.inp", "r"))
    {
        freopen("test.inp", "r", stdin);
        freopen("test.out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int Test = 1; //cin>>Test;
    while (Test--) solve();
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:206:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  206 |         freopen(_F".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:207:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  207 |         freopen(_F".OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:211:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  211 |         freopen("test.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:212:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  212 |         freopen("test.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
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