oj.uz

Submission #906696

# Submission time Handle Problem Language Result Execution time Memory
906696 2024-01-14T18:34:54 Z vjudge1 Catfish Farm (IOI22_fish) C++17
38 / 100
 351 ms 13936 KB 
#include "fish.h"

#pragma GCC target ("avx2")
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")

#include<bits/stdc++.h>
#include<math.h>
using namespace std;

typedef long long int ll;
typedef long double ld;
typedef pair<ll, ll> pl;
typedef vector<ll> vl;
#define FD(i, r, l) for(ll i = r; i > (l); --i)

#define K first
#define V second
#define G(x) ll x; cin >> x;
#define GD(x) ld x; cin >> x;
#define GS(s) string s; cin >> s;
#define EX(x) { cout << x << '\n'; exit(0); }
#define A(a) (a).begin(), (a).end()
#define F(i, l, r) for (ll i = l; i < (r); ++i)

#define NN 310

ll grid[NN][NN];
ll n;

ll dp1[NN][NN];
ll noreq(ll, ll); // no request fishies, so len == prev wall. 

ll dp2[NN][NN];
ll req(ll, ll); 

// previous column did NOT request any right fishies here
// so we simply have a free wall to attach to 
ll noreq(ll i, ll len) {
    // assert(len == 0 or len == n);
    if (i == n) return 0;
    auto &DP = dp1[i][len];
    if (!~DP) {
        DP = noreq(i+1, n); // no restrictions so build big wall.

        F(nlen, 0, n+1) DP = max(DP, req(i, nlen)); // basically can set up any wall here before taking right fishes

        ll lsum = 0;
        F(j, 0, len) {
            lsum += grid[i][j];
        }
        DP = max(DP, lsum + noreq(i+1, 0));
        {
            ll tsum = lsum;
            F(j, 0, len) {
                tsum -= grid[i][j];
                DP = max(DP, tsum + noreq(i+1, j+1));
            }
        }


        F(covering, len, n) {
            // not lsum naymore jsut cum sum
            lsum += grid[i][covering];
            DP = max(DP, lsum + req(i+1, covering + 1));
        }

    }   
    return DP;   
}


// previous column requested right fishes here;
// so len == min bound on wall (we cannot take anything below len)

ll req(ll i, ll len) {
    if (i == n) return len == 0 ? 0 : -9e18; // i should need 0 fishes here
    auto &DP = dp2[i][len];
    if (!~DP) {
        // note that we cannot request any left fishes here.
        DP = noreq(i+1, n);  // if we don't request ANY fish here, just go up to max 

        ll sm = 0;
        F(covering, len, n) {
            sm += grid[i][covering];
            DP = max(DP, sm + req(i+1, covering + 1));
        }
    }   
    return DP;
}

long long max_weights(int N, int M, std::vector<int> X, std::vector<int> Y,
                      std::vector<int> W) {
    if (N <= 300) {
        memset(dp1, -1, sizeof dp1);
        memset(dp2, -1, sizeof dp2);
        
        n = N;
        memset(grid, 0, sizeof grid);
        F(i, 0, M) grid[X[i]][Y[i]] = W[i];
        
        return noreq(0, 0);          
    }
    bool case1 = 1;
    bool case2 = 1;
    bool case3 = 1;
    F(i, 0, M) case1 &= X[i]%2 == 0;
    F(i, 0, M) case2 &= X[i] <= 1;
    F(i, 0, M) case3 &= Y[i] == 0;
    
    if (case1) {
        return accumulate(A(W), 0ll);
    } else if (case2) {
        ll c[2] = {};
        F(i, 0, M) c[X[i]] += W[i];
        return max(c[0], c[1]);
    } else if (case3) {
        vl grid(n);
        F(i, 0, M) grid[X[i]] = W[i];
        vector<vl> dp(n+10, vl(3, -1));
        auto rec = [&](auto &&self, ll i, ll f) -> ll {
            if (i >= n) return 0;
            auto &DP = dp[i][f];
            if (!~DP) {
                DP = self(self, i+1, 1);
                if (f) DP = max(DP, grid[i] + self(self, i+1, 0));
                DP = max(DP, grid[i] + self(self, i+2, 0));
            }
            return DP;
        };
        return rec(rec, 0, 0);
    }

    return -1;
}

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 3412 KB Output is correct
2 Correct 23 ms 4440 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 67 ms 13824 KB Output is correct
6 Correct 69 ms 13936 KB Output is correct

Subtask #2
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Incorrect 40 ms 5680 KB 1st lines differ - on the 1st token, expected: '40604614618209', found: '40479197388443'
3 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Runtime error 1 ms 348 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2648 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 1 ms 2648 KB Output is correct
8 Correct 2 ms 2652 KB Output is correct
9 Correct 42 ms 2652 KB Output is correct
10 Correct 324 ms 2828 KB Output is correct
11 Correct 44 ms 2756 KB Output is correct
12 Correct 329 ms 2796 KB Output is correct
13 Correct 6 ms 2648 KB Output is correct
14 Correct 340 ms 2792 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2648 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 1 ms 2648 KB Output is correct
8 Correct 2 ms 2652 KB Output is correct
9 Correct 42 ms 2652 KB Output is correct
10 Correct 324 ms 2828 KB Output is correct
11 Correct 44 ms 2756 KB Output is correct
12 Correct 329 ms 2796 KB Output is correct
13 Correct 6 ms 2648 KB Output is correct
14 Correct 340 ms 2792 KB Output is correct
15 Correct 341 ms 2776 KB Output is correct
16 Correct 7 ms 2648 KB Output is correct
17 Correct 351 ms 3860 KB Output is correct
18 Correct 337 ms 3672 KB Output is correct
19 Correct 336 ms 3836 KB Output is correct
20 Correct 348 ms 3832 KB Output is correct
21 Correct 340 ms 3928 KB Output is correct
22 Correct 345 ms 4700 KB Output is correct
23 Correct 331 ms 2980 KB Output is correct
24 Correct 337 ms 3476 KB Output is correct
25 Correct 328 ms 2896 KB Output is correct
26 Correct 331 ms 2908 KB Output is correct

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2648 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2648 KB Output is correct
7 Correct 1 ms 2648 KB Output is correct
8 Correct 2 ms 2652 KB Output is correct
9 Correct 42 ms 2652 KB Output is correct
10 Correct 324 ms 2828 KB Output is correct
11 Correct 44 ms 2756 KB Output is correct
12 Correct 329 ms 2796 KB Output is correct
13 Correct 6 ms 2648 KB Output is correct
14 Correct 340 ms 2792 KB Output is correct
15 Correct 341 ms 2776 KB Output is correct
16 Correct 7 ms 2648 KB Output is correct
17 Correct 351 ms 3860 KB Output is correct
18 Correct 337 ms 3672 KB Output is correct
19 Correct 336 ms 3836 KB Output is correct
20 Correct 348 ms 3832 KB Output is correct
21 Correct 340 ms 3928 KB Output is correct
22 Correct 345 ms 4700 KB Output is correct
23 Correct 331 ms 2980 KB Output is correct
24 Correct 337 ms 3476 KB Output is correct
25 Correct 328 ms 2896 KB Output is correct
26 Correct 331 ms 2908 KB Output is correct
27 Incorrect 1 ms 348 KB 1st lines differ - on the 1st token, expected: '2999', found: '-1'
28 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Runtime error 1 ms 348 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 3412 KB Output is correct
2 Correct 23 ms 4440 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 67 ms 13824 KB Output is correct
6 Correct 69 ms 13936 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Incorrect 40 ms 5680 KB 1st lines differ - on the 1st token, expected: '40604614618209', found: '40479197388443'
9 Halted 0 ms 0 KB -