oj.uz

Submission #199009

# Submission time Handle Problem Language Result Execution time Memory
199009 2020-01-28T16:14:18 Z dolphingarlic Zoltan (COCI16_zoltan) C++14
98 / 140
 293 ms 20156 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, int> lis[200001], lds[200001];
map<int, int> mp;

void update(int pos, int len, int 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, int> 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) swap(a[i], a[n - i + 1]);

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

    int ans = 0;
    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
98.0 / 140.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 6 ms 376 KB Output is correct
3 Incorrect 5 ms 376 KB Output isn't correct
4 Correct 6 ms 376 KB Output is correct
5 Incorrect 5 ms 376 KB Output isn't correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 6 ms 504 KB Output is correct
8 Correct 6 ms 504 KB Output is correct
9 Incorrect 6 ms 504 KB Output isn't correct
10 Correct 6 ms 504 KB Output is correct
11 Correct 134 ms 15852 KB Output is correct
12 Correct 112 ms 13808 KB Output is correct
13 Correct 105 ms 13044 KB Output is correct
14 Incorrect 159 ms 14064 KB Output isn't correct
15 Incorrect 225 ms 17392 KB Output isn't correct
16 Incorrect 293 ms 20156 KB Output isn't correct
17 Correct 172 ms 18160 KB Output is correct
18 Correct 164 ms 17904 KB Output is correct
19 Correct 169 ms 18160 KB Output is correct
20 Correct 161 ms 18032 KB Output is correct