oj.uz

Submission #199017

# Submission time Handle Problem Language Result Execution time Memory
199017 2020-01-28T16:22:42 Z dolphingarlic Zoltan (COCI16_zoltan) C++14
119 / 140
 273 ms 21360 KB 
#include <bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
typedef long long ll;
using namespace std;

const ll MOD = 1e9 + 7;

int n, a[200001], g_len[200001];
ll pw[200001], g_num[200001];
vector<int> uniq;
pair<int, ll> lis[200001], lds[200001];
map<int, int> mp;

void update(int pos, int len, ll num) {
    for (; pos <= n; pos += (pos & (-pos))) {
        if (g_len[pos] == len) {
            g_num[pos] = (g_num[pos] + num) % MOD;
        } else if (g_len[pos] < len) {
            g_len[pos] = len;
            g_num[pos] = num;
        }
    }
}
pair<int, ll> query(int pos) {
    pair<int, ll> ans;
    for (; pos; pos -= (pos & (-pos))) {
        if (g_len[pos] == ans.first) {
            ans.second = (ans.second + g_num[pos]) % MOD;
        } else if (g_len[pos] > ans.first) {
            ans = {g_len[pos], g_num[pos]};
        }
    }
    return ans;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n;
    pw[0] = 1;
    FOR(i, 1, n + 1) {
        cin >> a[i];
        pw[i] = (pw[i - 1] << 1) % MOD;
        uniq.push_back(a[i]);
    }
    sort(uniq.begin(), uniq.end());
    uniq.erase(unique(uniq.begin(), uniq.end()), uniq.end());
    FOR(i, 0, uniq.size()) mp[uniq[i]] = i + 1;
    FOR(i, 1, n + 1) a[i] = mp[a[i]];
    FOR(i, 1, (n + 1) / 2 + 1) swap(a[i], a[n - i + 1]);

    FOR(i, 1, n + 1) {
        int len;
        ll num;
        tie(len, num) = query(a[i]);
        if (!len) num = 1;
        len++;
        lis[i] = {len, num};
        update(a[i] + 1, len, num);
    }
    FOR(i, 1, n + 1) a[i] = n - a[i] + 1, g_num[i] = g_len[i] = 0;
    FOR(i, 1, n + 1) {
        int len;
        ll num;
        tie(len, num) = query(a[i]);
        if (!len) num = 1;
        len++;
        lds[i] = {len, num};
        update(a[i] + 1, len, num);
    }

    int ans = -1;
    ll a_num = -1;
    FOR(i, 1, n + 1) {
        int len = lis[i].first + lds[i].first - 1;
        ll num = (pw[n - len] * (lis[i].second * lds[i].second) % MOD) % MOD;
        if (len == ans) {
            a_num = (a_num + num) % MOD;
        } else if (len > ans) {
            ans = len;
            a_num = num;
        }
    }
    cout << ans << ' ' << a_num;
    return 0;
}

Compilation message

zoltan.cpp: In function 'int main()':
zoltan.cpp:2:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define FOR(i, x, y) for (int i = x; i < y; i++)
zoltan.cpp:48:9:
     FOR(i, 0, uniq.size()) mp[uniq[i]] = i + 1;
         ~~~~~~~~~~~~~~~~~               
zoltan.cpp:48:5: note: in expansion of macro 'FOR'
     FOR(i, 0, uniq.size()) mp[uniq[i]] = i + 1;
     ^~~

Subtask #1
119.0 / 140.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 7 ms 376 KB Output is correct
5 Correct 5 ms 376 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 504 KB Output is correct
8 Correct 5 ms 504 KB Output is correct
9 Correct 5 ms 504 KB Output is correct
10 Correct 5 ms 504 KB Output is correct
11 Correct 136 ms 17128 KB Output is correct
12 Correct 113 ms 14904 KB Output is correct
13 Correct 105 ms 14072 KB Output is correct
14 Incorrect 164 ms 14960 KB Output isn't correct
15 Incorrect 217 ms 18416 KB Output isn't correct
16 Incorrect 273 ms 21360 KB Output isn't correct
17 Correct 158 ms 19952 KB Output is correct
18 Correct 163 ms 19952 KB Output is correct
19 Correct 162 ms 19952 KB Output is correct
20 Correct 165 ms 20080 KB Output is correct