oj.uz

답안 #773842

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
773842 2023-07-05T09:02:25 Z CyberCow 3단 점프 (JOI19_jumps) C++17
19 / 100
 1964 ms 103592 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 < 300; i++)
        {
            for ( j = i + 1; j < 300; j++)
            {
                ss.push_back({ v[i].first + v[j].first, {min(v[i].second, v[j].second), max(v[i].second, v[i].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;
            if (r - l > 1)
            {
                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 + 1, 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:113:24: 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

# 결과 실행 시간 메모리 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 780 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 720 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 724 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 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 780 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 720 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 724 KB Output is correct
11 Correct 1892 ms 103424 KB Output is correct
12 Correct 1868 ms 103484 KB Output is correct
13 Correct 1914 ms 103592 KB Output is correct
14 Correct 1889 ms 103416 KB Output is correct
15 Correct 1964 ms 103512 KB Output is correct
16 Correct 1934 ms 102868 KB Output is correct
17 Correct 1937 ms 102740 KB Output is correct
18 Correct 1910 ms 102828 KB Output is correct
19 Correct 1908 ms 103320 KB Output is correct

Subtask #3
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 57 ms 7608 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 54.0

# 결과 실행 시간 메모리 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 780 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 720 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 724 KB Output is correct
11 Correct 1892 ms 103424 KB Output is correct
12 Correct 1868 ms 103484 KB Output is correct
13 Correct 1914 ms 103592 KB Output is correct
14 Correct 1889 ms 103416 KB Output is correct
15 Correct 1964 ms 103512 KB Output is correct
16 Correct 1934 ms 102868 KB Output is correct
17 Correct 1937 ms 102740 KB Output is correct
18 Correct 1910 ms 102828 KB Output is correct
19 Correct 1908 ms 103320 KB Output is correct
20 Incorrect 57 ms 7608 KB Output isn't correct
21 Halted 0 ms 0 KB -