oj.uz

Submission #906701

# Submission time Handle Problem Language Result Execution time Memory
906701 2024-01-14T18:59:52 Z vjudge1 Catfish Farm (IOI22_fish) C++17
44 / 100
 357 ms 17500 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) {
    ll rans = -1;

    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];
        
        rans = 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] = {};
        map<pl, ll> points;
        F(i, 0, M) {
            c[X[i]] += W[i];
            points[{X[i], Y[i]}] = W[i];
        }
        
        if (N == 2) {
            return max(c[0], c[1]);
        }
        ll tans = max(c[0], c[1]);
        ll tsum = c[1];
        F(i, 0, N) {
            tsum -= points[{1, i}];
            tsum += points[{0, i}];
            tans = max(tans, tsum);
        }

        return tans;
    } 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 -1e18;
            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, 1));
            }
            return DP;
        };
        // cout << rec(rec, 0, 0) << ' ' << rans << endl;
        // assert(rec(rec, 0, 0) == rans);
        return rec(rec, 0, 0);
    }

    return rans;
}

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 2136 KB Output is correct
2 Correct 23 ms 2652 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 67 ms 7252 KB Output is correct
6 Correct 69 ms 7248 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2648 KB Output is correct
2 Correct 136 ms 15416 KB Output is correct
3 Correct 149 ms 17500 KB Output is correct
4 Correct 22 ms 2392 KB Output is correct
5 Correct 23 ms 2648 KB Output is correct
6 Correct 2 ms 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 65 ms 13620 KB Output is correct
13 Correct 82 ms 15144 KB Output is correct
14 Correct 87 ms 13620 KB Output is correct
15 Correct 80 ms 15056 KB Output is correct
16 Correct 64 ms 13392 KB Output is correct
17 Correct 87 ms 14924 KB Output is correct

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 2 ms 2652 KB Output is correct
3 Correct 1 ms 2652 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 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 42 ms 2648 KB Output is correct
10 Correct 327 ms 2828 KB Output is correct
11 Correct 42 ms 2648 KB Output is correct
12 Correct 338 ms 2808 KB Output is correct
13 Correct 6 ms 2652 KB Output is correct
14 Correct 324 ms 2652 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 2 ms 2652 KB Output is correct
3 Correct 1 ms 2652 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 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 42 ms 2648 KB Output is correct
10 Correct 327 ms 2828 KB Output is correct
11 Correct 42 ms 2648 KB Output is correct
12 Correct 338 ms 2808 KB Output is correct
13 Correct 6 ms 2652 KB Output is correct
14 Correct 324 ms 2652 KB Output is correct
15 Correct 327 ms 2652 KB Output is correct
16 Correct 7 ms 2652 KB Output is correct
17 Correct 337 ms 3864 KB Output is correct
18 Correct 335 ms 3672 KB Output is correct
19 Correct 342 ms 3928 KB Output is correct
20 Correct 336 ms 3796 KB Output is correct
21 Correct 339 ms 3852 KB Output is correct
22 Correct 357 ms 4700 KB Output is correct
23 Correct 331 ms 2992 KB Output is correct
24 Correct 330 ms 3416 KB Output is correct
25 Correct 324 ms 2796 KB Output is correct
26 Correct 326 ms 2968 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 2 ms 2652 KB Output is correct
3 Correct 1 ms 2652 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 2652 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 42 ms 2648 KB Output is correct
10 Correct 327 ms 2828 KB Output is correct
11 Correct 42 ms 2648 KB Output is correct
12 Correct 338 ms 2808 KB Output is correct
13 Correct 6 ms 2652 KB Output is correct
14 Correct 324 ms 2652 KB Output is correct
15 Correct 327 ms 2652 KB Output is correct
16 Correct 7 ms 2652 KB Output is correct
17 Correct 337 ms 3864 KB Output is correct
18 Correct 335 ms 3672 KB Output is correct
19 Correct 342 ms 3928 KB Output is correct
20 Correct 336 ms 3796 KB Output is correct
21 Correct 339 ms 3852 KB Output is correct
22 Correct 357 ms 4700 KB Output is correct
23 Correct 331 ms 2992 KB Output is correct
24 Correct 330 ms 3416 KB Output is correct
25 Correct 324 ms 2796 KB Output is correct
26 Correct 326 ms 2968 KB Output is correct
27 Incorrect 1 ms 344 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 2136 KB Output is correct
2 Correct 23 ms 2652 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 67 ms 7252 KB Output is correct
6 Correct 69 ms 7248 KB Output is correct
7 Correct 1 ms 2648 KB Output is correct
8 Correct 136 ms 15416 KB Output is correct
9 Correct 149 ms 17500 KB Output is correct
10 Correct 22 ms 2392 KB Output is correct
11 Correct 23 ms 2648 KB Output is correct
12 Correct 2 ms 2652 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2652 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 65 ms 13620 KB Output is correct
19 Correct 82 ms 15144 KB Output is correct
20 Correct 87 ms 13620 KB Output is correct
21 Correct 80 ms 15056 KB Output is correct
22 Correct 64 ms 13392 KB Output is correct
23 Correct 87 ms 14924 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Runtime error 1 ms 348 KB Execution killed with signal 11
26 Halted 0 ms 0 KB -