oj.uz

Submission #773893

# Submission time Handle Problem Language Result Execution time Memory
773893 2023-07-05T09:20:10 Z CyberCow Triple Jump (JOI19_jumps) C++17
19 / 100
 3506 ms 104724 KB 
//#include <bits/stdc++.h>
#include <random>
#include <algorithm>
#include <bitset>
#include <chrono>
#include <cmath>
#include <deque>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <map>
#include <queue>
#include <set>
#include <set>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#include <chrono>
#define fr first
#define sc second
#define ad push_back
using namespace std;
using ll = long long;
mt19937 rnd(348502);
const int N = 5005;
int a[200005];
int dp[N][N];
int s[4 * 200005];

void build(int p, int lp, int rp)
{
    if (lp == rp)
    {
        s[p] = a[lp];
        return;
    }
    int m = (lp + rp) / 2;
    build(p * 2, lp, m);
    build(p * 2 + 1, m + 1, rp);
    s[p] = max(s[p * 2], s[p * 2 + 1]);
}

int get(int p, int lp, int rp, int l, int r)
{
    if (l > r)
        return 0;
    if (lp == l && rp == r)
        return s[p];
    int m = (lp + rp) / 2;
    return max(get(p * 2, lp, m, l, min(r, m)), get(p * 2 + 1, m + 1, rp, max(m + 1, l), r));
}

void solve()
{
    int n, i, j, x, y, m;
    cin >> n;
    if (n <= 5000)
    {
        for (i = 1; i <= n; i++)
        {
            cin >> a[i];
        }
        build(1, 1, n);
        for (i = 1; i <= n; i++)
        {
            int ma = 0;
            for (j = i + 2; j <= n; j++)
            {
                dp[i][j] = max(dp[i][j], get(1, 1, n, i + 1, (i + j) / 2) + a[i] + a[j]);
            }
        }
        for (i = 2; i <= n; i++)
        {
            for (j = 1; j <= n; j++)
            {
                dp[j][j + i - 1] = max(dp[j][j + i - 1], max(dp[j + 1][j + i - 1], dp[j][j + i - 2]));
            }
        }
        int q;
        cin >> q;
        for (i = 0; i < q; i++)
        {
            cin >> x >> y;
            cout << dp[x][y] << '\n';
        }
    }
    else
    {
        vector<pair<int, int>> v;
        vector<pair<int, pair<int, int>>>ss;
        for ( i = 1; i <= n; i++)
        {
            cin >> a[i];
            v.push_back({ a[i], i });
        }
        int q, xx, yy;
        cin >> q >> xx >> yy;
        build(1, 1, n);
        sort(v.begin(), v.end());
        reverse(v.begin(), v.end());
        for ( i = 0; i < min(1500, n); i++)
        {
            for ( j = i + 1; j < min(4000, n); j++)
            {
                ss.push_back({ v[i].first + v[j].first, {min(v[i].second, v[j].second), max(v[i].second, v[j].second)} });
            }
        }
        sort(ss.begin(), ss.end());
        int ans = 0;
        for (i = 0; i < ss.size(); i++)
        {
            int l = ss[i].second.first, r = ss[i].second.second;
            ans = max(ans, a[l] + a[r] + get(1, 1, n, l + 1, r - 1));
            ans = max(ans, a[l] + a[r] + get(1, 1, n, max(1, l - (r - l)), l - 1));
            ans = max(ans, a[l] + a[r] + get(1, 1, n, r + (r - l), n));
        }
        cout << ans;
    }
}


int main() {    
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    ll tt = 1;
    //cin >> tt;
    while (tt--) {
        solve();
    }
    return 0;
}

Compilation message

jumps.cpp: In function 'void solve()':
jumps.cpp:69:17: warning: unused variable 'ma' [-Wunused-variable]
   69 |             int ma = 0;
      |                 ^~
jumps.cpp:113:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  113 |         for (i = 0; i < ss.size(); i++)
      |                     ~~^~~~~~~~~~~
jumps.cpp:58:24: warning: unused variable 'm' [-Wunused-variable]
   58 |     int n, i, j, x, y, m;
      |                        ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 664 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 664 KB Output is correct
11 Correct 1950 ms 103408 KB Output is correct
12 Correct 1972 ms 103304 KB Output is correct
13 Correct 1911 ms 103352 KB Output is correct
14 Correct 1948 ms 103408 KB Output is correct
15 Correct 1926 ms 103384 KB Output is correct
16 Correct 1894 ms 102732 KB Output is correct
17 Correct 1952 ms 102784 KB Output is correct
18 Correct 1953 ms 102756 KB Output is correct
19 Correct 1949 ms 103252 KB Output is correct

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 3506 ms 104724 KB Output is correct
2 Correct 2789 ms 104704 KB Output is correct
3 Correct 2877 ms 104688 KB Output is correct
4 Incorrect 3448 ms 104656 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 664 KB Output is correct
11 Correct 1950 ms 103408 KB Output is correct
12 Correct 1972 ms 103304 KB Output is correct
13 Correct 1911 ms 103352 KB Output is correct
14 Correct 1948 ms 103408 KB Output is correct
15 Correct 1926 ms 103384 KB Output is correct
16 Correct 1894 ms 102732 KB Output is correct
17 Correct 1952 ms 102784 KB Output is correct
18 Correct 1953 ms 102756 KB Output is correct
19 Correct 1949 ms 103252 KB Output is correct
20 Correct 3506 ms 104724 KB Output is correct
21 Correct 2789 ms 104704 KB Output is correct
22 Correct 2877 ms 104688 KB Output is correct
23 Incorrect 3448 ms 104656 KB Output isn't correct
24 Halted 0 ms 0 KB -