oj.uz

Submission #773875

# Submission time Handle Problem Language Result Execution time Memory
773875 2023-07-05T09:15:03 Z CyberCow Triple Jump (JOI19_jumps) C++17
19 / 100
 2041 ms 103756 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(1300, n); i++)
        {
            for ( j = i + 1; j < min(1300, 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 720 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 720 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 720 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 720 KB Output is correct
11 Correct 1940 ms 103576 KB Output is correct
12 Correct 1939 ms 103532 KB Output is correct
13 Correct 2041 ms 103496 KB Output is correct
14 Correct 1946 ms 103736 KB Output is correct
15 Correct 1980 ms 103756 KB Output is correct
16 Correct 1964 ms 103100 KB Output is correct
17 Correct 2004 ms 103208 KB Output is correct
18 Correct 1976 ms 103032 KB Output is correct
19 Correct 1967 ms 103564 KB Output is correct

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 661 ms 18640 KB Output is correct
2 Correct 484 ms 18728 KB Output is correct
3 Correct 486 ms 18628 KB Output is correct
4 Incorrect 602 ms 18676 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 720 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 720 KB Output is correct
11 Correct 1940 ms 103576 KB Output is correct
12 Correct 1939 ms 103532 KB Output is correct
13 Correct 2041 ms 103496 KB Output is correct
14 Correct 1946 ms 103736 KB Output is correct
15 Correct 1980 ms 103756 KB Output is correct
16 Correct 1964 ms 103100 KB Output is correct
17 Correct 2004 ms 103208 KB Output is correct
18 Correct 1976 ms 103032 KB Output is correct
19 Correct 1967 ms 103564 KB Output is correct
20 Correct 661 ms 18640 KB Output is correct
21 Correct 484 ms 18728 KB Output is correct
22 Correct 486 ms 18628 KB Output is correct
23 Incorrect 602 ms 18676 KB Output isn't correct
24 Halted 0 ms 0 KB -