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답안 #707658

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
707658 2023-03-09T16:44:23 Z Johann 메기 농장 (IOI22_fish) C++17
44 / 100
 1000 ms 258400 KB 
#include "fish.h"

#include "bits/stdc++.h"
using namespace std;

typedef long long ll;
typedef pair<ll, ll> pii;
typedef vector<ll> vi;
typedef vector<vi> vvi;
typedef vector<pii> vpii;
typedef vector<vpii> vvpii;
typedef map<ll, ll> mii;
typedef vector<mii> vmii;
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()

const ll INF = 3e5 * 1e9 + 100;

void updateIdx(ll y, ll &ny, mii::iterator &itpref0, ll &pref0)
{
  if (itpref0->first == y)
  {
    pref0 = itpref0->second;
    ++itpref0;
  }
  ny = min(itpref0->first, ny);
}

long long max_weights(int N, int M, std::vector<int> X, std::vector<int> Y, std::vector<int> W)
{
  vmii grid(N + 4); // becomes prefix grid
  for (int x = 0; x < sz(grid); ++x)
    grid[x][0] = 0;

  for (int i = 0; i < M; ++i)
    grid[X[i] + 3][Y[i]] = W[i];

  for (int x = 0; x < sz(grid); ++x)
  {
    ll pref = 0;
    for (auto it = grid[x].begin(); it != grid[x].end(); ++it)
    {
      pref += it->second;
      it->second = pref;
    }
    grid[x][N] = pref;
  }

  vmii dpg(sz(grid));  // growth stack thing
  vmii dp(sz(grid));   // normal all dp
  vi dpm(sz(grid), 0); // maximum einer Spaltes
  for (int i = 0; i < 3; ++i)
    dpg[i][0] = dpg[i][N] = dp[i][0] = dp[i][N] = 0;

  for (int x = 3; x < sz(grid) - 1; ++x) // so i choose the borders
  {
    ll c1 = -INF, c2 = -INF; // running variables for case 1 and 2 // TODO: INIT
    ll y = 0, ny;
    ll pref0 = 0, pref1 = 0, pref2 = 0, dp0 = 0, dpg1 = 0;
    auto itpref0 = grid[x - 1].begin(); // idx for pref x-1
    auto itpref1 = grid[x].begin();     // idx for pref x
    auto itpref2 = grid[x + 1].begin(); // idx for pref x+1
    auto itdp0 = dp[x - 2].begin();     // idx for dp x-2
    auto itdpg1 = dpg[x - 1].begin();   // idx for dpg x-1
    while (y < N)
    {
      // update indices
      ny = INT_MAX;
      updateIdx(y, ny, itpref0, pref0);
      updateIdx(y, ny, itpref1, pref1);
      updateIdx(y, ny, itpref2, pref2);
      updateIdx(y, ny, itdp0, dp0);
      updateIdx(y, ny, itdpg1, dpg1);

      // Case 1 - last tower in x-1 and smaller y
      c1 = max(c1, dpg1 - pref0 - pref1);
      dpg[x][y] = max(dpg[x][y], pref0 + pref2 + c1);

      // Case 2 - last tower in x-2 and smaller y
      c2 = max(c2, dp0 - pref0);
      dpg[x][y] = max(dpg[x][y], pref0 + pref2 + c2);

      // Case 3 - last tower in x-1 and larger y (or if it is smaller, case 1 performs better)
      // here the last tower might be larger than the current one
      dp[x][y] = max(dp[x][y], dpm[x - 1] - pref1 + pref2);

      // Case 4 - Last Tower in x-2 and larger y (or if it is smaller, case 2 performs better)
      dpg[x][y] = max(dpg[x][y], dpm[x - 2] + pref2);

      // Case 5 - Last Tower in x-3
      dpg[x][y] = max(dpg[x][y], dpm[x - 3] + pref0 + pref2);

      // keep track for dpg & dpm
      dp[x][y] = max(dp[x][y], dpg[x][y]);
      dpm[x] = max(dpm[x], dp[x][y]);

      y = ny;
    }
    dp[x][N] = max(dp[x][N], dp[x].rbegin()->second);
    dpg[x][N] = max(dpg[x][N], dpg[x].rbegin()->second);
  }

  return *max_element(all(dpm));
}

Subtask #1
0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1079 ms 106344 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Execution timed out 1083 ms 107676 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 68 ms 52632 KB Output is correct
2 Correct 63 ms 52640 KB Output is correct
3 Correct 78 ms 49684 KB Output is correct
4 Correct 75 ms 54204 KB Output is correct
5 Correct 96 ms 56600 KB Output is correct
6 Correct 91 ms 55952 KB Output is correct
7 Correct 101 ms 56632 KB Output is correct
8 Correct 97 ms 56652 KB Output is correct

Subtask #4
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 300 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 300 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 2 ms 852 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 2 ms 820 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 724 KB Output is correct

Subtask #5
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 300 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 300 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 2 ms 852 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 2 ms 820 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 724 KB Output is correct
15 Correct 20 ms 6020 KB Output is correct
16 Correct 3 ms 1108 KB Output is correct
17 Correct 71 ms 15540 KB Output is correct
18 Correct 66 ms 14028 KB Output is correct
19 Correct 78 ms 16052 KB Output is correct
20 Correct 68 ms 14804 KB Output is correct
21 Correct 51 ms 10640 KB Output is correct
22 Correct 118 ms 20824 KB Output is correct
23 Correct 47 ms 12184 KB Output is correct
24 Correct 62 ms 14668 KB Output is correct
25 Correct 3 ms 1212 KB Output is correct
26 Correct 23 ms 6544 KB Output is correct

Subtask #6
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 300 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 300 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 2 ms 852 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 2 ms 820 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 724 KB Output is correct
15 Correct 20 ms 6020 KB Output is correct
16 Correct 3 ms 1108 KB Output is correct
17 Correct 71 ms 15540 KB Output is correct
18 Correct 66 ms 14028 KB Output is correct
19 Correct 78 ms 16052 KB Output is correct
20 Correct 68 ms 14804 KB Output is correct
21 Correct 51 ms 10640 KB Output is correct
22 Correct 118 ms 20824 KB Output is correct
23 Correct 47 ms 12184 KB Output is correct
24 Correct 62 ms 14668 KB Output is correct
25 Correct 3 ms 1212 KB Output is correct
26 Correct 23 ms 6544 KB Output is correct
27 Execution timed out 1096 ms 240332 KB Time limit exceeded
28 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 68 ms 52632 KB Output is correct
2 Correct 63 ms 52640 KB Output is correct
3 Correct 78 ms 49684 KB Output is correct
4 Correct 75 ms 54204 KB Output is correct
5 Correct 96 ms 56600 KB Output is correct
6 Correct 91 ms 55952 KB Output is correct
7 Correct 101 ms 56632 KB Output is correct
8 Correct 97 ms 56652 KB Output is correct
9 Execution timed out 1083 ms 258400 KB Time limit exceeded
10 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1079 ms 106344 KB Time limit exceeded
2 Halted 0 ms 0 KB -