oj.uz

답안 #773879

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
773879 2023-07-05T09:16:34 Z CyberCow 3단 점프 (JOI19_jumps) C++17
19 / 100
 3229 ms 104728 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(3000, n); i++)
        {
            for ( j = i + 1; j < min(3000, 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

# 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 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

# 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 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 1983 ms 103344 KB Output is correct
12 Correct 1973 ms 103224 KB Output is correct
13 Correct 1881 ms 103276 KB Output is correct
14 Correct 1918 ms 103408 KB Output is correct
15 Correct 1893 ms 103340 KB Output is correct
16 Correct 2068 ms 102668 KB Output is correct
17 Correct 2028 ms 102680 KB Output is correct
18 Correct 1973 ms 102756 KB Output is correct
19 Correct 1940 ms 103276 KB Output is correct

Subtask #3
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3229 ms 104692 KB Output is correct
2 Correct 2545 ms 104728 KB Output is correct
3 Correct 2752 ms 104728 KB Output is correct
4 Incorrect 3220 ms 104676 KB Output isn't correct
5 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 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 1983 ms 103344 KB Output is correct
12 Correct 1973 ms 103224 KB Output is correct
13 Correct 1881 ms 103276 KB Output is correct
14 Correct 1918 ms 103408 KB Output is correct
15 Correct 1893 ms 103340 KB Output is correct
16 Correct 2068 ms 102668 KB Output is correct
17 Correct 2028 ms 102680 KB Output is correct
18 Correct 1973 ms 102756 KB Output is correct
19 Correct 1940 ms 103276 KB Output is correct
20 Correct 3229 ms 104692 KB Output is correct
21 Correct 2545 ms 104728 KB Output is correct
22 Correct 2752 ms 104728 KB Output is correct
23 Incorrect 3220 ms 104676 KB Output isn't correct
24 Halted 0 ms 0 KB -