oj.uz

Submission #947126

# Submission time Handle Problem Language Result Execution time Memory
947126 2024-03-15T14:23:01 Z Nhoksocqt1 Catfish Farm (IOI22_fish) C++17
32 / 100
 285 ms 224012 KB 
#include<bits/stdc++.h>
using namespace std;

#define inf 0x3f3f3f3f
#define sz(x) int((x).size())
#define fi first
#define se second
typedef long long ll;
typedef pair<int, int> ii;

template<class X, class Y>
	inline bool maximize(X &x, const Y &y) {return (x < y ? x = y, 1 : 0);}
template<class X, class Y>
	inline bool minimize(X &x, const Y &y) {return (x > y ? x = y, 1 : 0);}

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int Random(int l, int r) {
    return uniform_int_distribution<int>(l, r)(rng);
}

const int MAXN = 100005;

struct Fish {
    int x, y, w;
} fish[3 * MAXN];

ll sum[303][303], f[303][303][303], maxPre[303][303], maxSuf[303][303];
int val[MAXN], nSize, numFish;

ll sub1(void) {
    ll sum(0);
    for (int i = 0; i < numFish; ++i)
        sum += fish[i].w;

    return sum;
}

ll sub2(void) {
    ll ans(0), sum0(0), sum1(0);
    int j(numFish);
    for (int i = 0; i < numFish; ++i) {
        if(fish[i].x == 0) {
            sum0 += fish[i].w;
        } else {
            if(j == numFish)
                j = i;

            sum1 += fish[i].w;
        }
    }

    ans = max(sum0, sum1);
    if(nSize == 2)
        return ans;

    sum0 = 0;
    for (int i = 0; i < numFish; ++i) {
        if(fish[i].x == 1)
            break;

        sum0 += fish[i].w;
        while(j < numFish && fish[j].y <= fish[i].y) {
            sum1 -= fish[j].w;
            ++j;
        }

        ans = max(ans, sum0 + sum1);
    }

    return ans;
}

ll sub3(void) {
    for (int i = 0; i <= 1; ++i)
        f[i][0][0] = f[i][1][0] = f[i][2][0] = -1e18;

    for (int i = 0; i < numFish; ++i)
        val[fish[i].x] = fish[i].w;

    f[0][2][0] = 0;
    for (int i = 0; i < nSize; ++i) {
        int pre(i & 1), cur(!pre);
        f[cur][0][0] = max(f[pre][0][0], max(f[pre][1][0], f[pre][2][0] + (i > 0 ? val[i - 1] : 0)));
        f[cur][1][0] = f[pre][0][0] + val[i];
        f[cur][2][0] = max(f[pre][2][0], f[pre][1][0]);

        //cout << f[cur][0][0] << ' ' << f[cur][1][0] << ' ' << f[cur][2][0] << '\n';
    }

    return max({f[nSize & 1][0][0], f[nSize & 1][1][0], f[nSize & 1][2][0]});
}

ll sub5(void) {
    for (int i = 0; i < numFish; ++i)
        sum[fish[i].x][fish[i].y + 1] += fish[i].w;

    for (int i = 0; i < nSize; ++i) {
        for (int j = 1; j <= nSize; ++j)
            sum[i][j] += sum[i][j - 1];
    }

    for (int j = 0; j <= nSize; ++j) {
        for (int k = 0; k <= nSize; ++k) {
            f[0][j][k] = -1e18;
        }
    }

    f[0][0][0] = 0;
    for (int j = 0; j <= nSize; ++j) {
        for (int k = 0; k <= nSize; ++k) {
            maxPre[j][k] = f[0][j][k];
            if(k > 0)
                maxPre[j][k] = max(maxPre[j][k], maxPre[j][k - 1]);
        }
    }

    for (int j = nSize; j >= 0; --j) {
        for (int k = nSize; k >= 0; --k) {
            maxSuf[j][k] = f[0][j][k];
            if(k + 1 < nSize)
                maxSuf[j][k] = max(maxSuf[j][k], maxSuf[j][k + 1]);
        }
    }

    for (int i = 0; i < nSize; ++i) {
        for (int coln = 0; coln <= nSize; ++coln) {
            for (int pcol = 0; pcol <= nSize; ++pcol) {
                if(coln <= pcol) {
                    f[i + 1][coln][pcol] = maxSuf[pcol][0] + sum[i][pcol] - sum[i][coln];
                    continue;
                }

                f[i + 1][coln][pcol] = maxPre[pcol][coln] + (i > 0 ? sum[i - 1][coln] : 0);
                f[i + 1][coln][pcol] = max(f[i + 1][coln][pcol], maxSuf[pcol][coln]);
            }
        }

        for (int j = 0; j <= nSize; ++j) {
            for (int k = 0; k <= nSize; ++k) {
                maxPre[j][k] = f[i + 1][j][k] - sum[i][max(j, k)];
                if(k > 0)
                    maxPre[j][k] = max(maxPre[j][k], maxPre[j][k - 1]);
            }
        }

        for (int j = nSize; j >= 0; --j) {
            for (int k = nSize; k >= 0; --k) {
                maxSuf[j][k] = f[i + 1][j][k];
                if(k + 1 < nSize)
                    maxSuf[j][k] = max(maxSuf[j][k], maxSuf[j][k + 1]);
            }
        }
    }

    ll res(0);
    for (int j = 0; j <= nSize; ++j)
        res = max(res, maxSuf[j][0]);

    return res;
}

ll max_weights(int _N, int _M, vector<int> _X, vector<int> _Y, vector<int> _W) {
    nSize = _N, numFish = _M;

    bool check1(1), check2(1), check3(1);
    for (int i = 0; i < numFish; ++i) {
        fish[i] = {_X[i], _Y[i], _W[i]};
        check1 &= !(fish[i].x & 1);
        check2 &= (fish[i].x <= 1);
        check3 &= (fish[i].y == 0);
    }

    sort(fish, fish + numFish, [](const Fish &a, const Fish &b) {
        return (a.x != b.x) ? a.x < b.x : a.y < b.y;
    });

    if(check1) {
        return sub1();
    } else
        if(check2) {
            return sub2();
        } else
            if(check3) {
                return sub3();
            } else
                if(nSize <= 300) {
                    return sub5();
                }
}

#ifdef Nhoksocqt1

int main(void) {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);

    #define TASK "fish"
    if(fopen(TASK".inp", "r")) {
        freopen(TASK".inp", "r", stdin);
        freopen(TASK".out", "w", stdout);
    }

    vector<int> _X, _Y, _W;
    int _N, _M;
    cin >> _N >> _M;

    _X.resize(_N), _Y.resize(_N), _W.resize(_N);
    for (int i = 0; i < _N; ++i)
        cin >> _X[i] >> _Y[i] >> _W[i];

    ll ans = max_weights(_N, _M, _X, _Y, _W);
    cout << "ANSWER: " << ans << '\n';
    cout << "SUB5: " << sub5() << '\n';

    return 0;
}

#endif // Nhoksocqt1

Compilation message

fish.cpp: In function 'll max_weights(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
fish.cpp:189:1: warning: control reaches end of non-void function [-Wreturn-type]
  189 | }
      | ^

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 6256 KB Output is correct
2 Correct 29 ms 6728 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 93 ms 11380 KB Output is correct
6 Correct 98 ms 11348 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 52 ms 8340 KB Output is correct
3 Correct 58 ms 9052 KB Output is correct
4 Correct 23 ms 6232 KB Output is correct
5 Correct 29 ms 6740 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4440 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 23 ms 6264 KB Output is correct
13 Correct 28 ms 6748 KB Output is correct
14 Correct 24 ms 6264 KB Output is correct
15 Correct 26 ms 6492 KB Output is correct
16 Correct 24 ms 6236 KB Output is correct
17 Correct 27 ms 6584 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Output is correct
2 Correct 2 ms 8540 KB Output is correct
3 Correct 18 ms 10036 KB Output is correct
4 Correct 12 ms 9564 KB Output is correct
5 Correct 29 ms 11100 KB Output is correct
6 Correct 25 ms 11100 KB Output is correct
7 Correct 28 ms 11100 KB Output is correct
8 Correct 29 ms 11092 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12636 KB Output is correct
2 Correct 2 ms 14684 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 10588 KB Output is correct
9 Correct 39 ms 117284 KB Output is correct
10 Correct 261 ms 223988 KB Output is correct
11 Correct 40 ms 117304 KB Output is correct
12 Correct 257 ms 223980 KB Output is correct
13 Correct 10 ms 63832 KB Output is correct
14 Correct 285 ms 223732 KB Output is correct

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12636 KB Output is correct
2 Correct 2 ms 14684 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 10588 KB Output is correct
9 Correct 39 ms 117284 KB Output is correct
10 Correct 261 ms 223988 KB Output is correct
11 Correct 40 ms 117304 KB Output is correct
12 Correct 257 ms 223980 KB Output is correct
13 Correct 10 ms 63832 KB Output is correct
14 Correct 285 ms 223732 KB Output is correct
15 Correct 264 ms 224012 KB Output is correct
16 Incorrect 11 ms 64092 KB 1st lines differ - on the 1st token, expected: '741526820812', found: '730934828993'
17 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12636 KB Output is correct
2 Correct 2 ms 14684 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 10588 KB Output is correct
9 Correct 39 ms 117284 KB Output is correct
10 Correct 261 ms 223988 KB Output is correct
11 Correct 40 ms 117304 KB Output is correct
12 Correct 257 ms 223980 KB Output is correct
13 Correct 10 ms 63832 KB Output is correct
14 Correct 285 ms 223732 KB Output is correct
15 Correct 264 ms 224012 KB Output is correct
16 Incorrect 11 ms 64092 KB 1st lines differ - on the 1st token, expected: '741526820812', found: '730934828993'
17 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Output is correct
2 Correct 2 ms 8540 KB Output is correct
3 Correct 18 ms 10036 KB Output is correct
4 Correct 12 ms 9564 KB Output is correct
5 Correct 29 ms 11100 KB Output is correct
6 Correct 25 ms 11100 KB Output is correct
7 Correct 28 ms 11100 KB Output is correct
8 Correct 29 ms 11092 KB Output is correct
9 Runtime error 43 ms 18792 KB Execution killed with signal 11
10 Halted 0 ms 0 KB -

Subtask #8
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 6256 KB Output is correct
2 Correct 29 ms 6728 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 93 ms 11380 KB Output is correct
6 Correct 98 ms 11348 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 52 ms 8340 KB Output is correct
9 Correct 58 ms 9052 KB Output is correct
10 Correct 23 ms 6232 KB Output is correct
11 Correct 29 ms 6740 KB Output is correct
12 Correct 1 ms 4444 KB Output is correct
13 Correct 1 ms 4444 KB Output is correct
14 Correct 1 ms 4440 KB Output is correct
15 Correct 1 ms 4444 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 23 ms 6264 KB Output is correct
19 Correct 28 ms 6748 KB Output is correct
20 Correct 24 ms 6264 KB Output is correct
21 Correct 26 ms 6492 KB Output is correct
22 Correct 24 ms 6236 KB Output is correct
23 Correct 27 ms 6584 KB Output is correct
24 Correct 1 ms 4440 KB Output is correct
25 Correct 2 ms 8540 KB Output is correct
26 Correct 18 ms 10036 KB Output is correct
27 Correct 12 ms 9564 KB Output is correct
28 Correct 29 ms 11100 KB Output is correct
29 Correct 25 ms 11100 KB Output is correct
30 Correct 28 ms 11100 KB Output is correct
31 Correct 29 ms 11092 KB Output is correct
32 Correct 2 ms 12636 KB Output is correct
33 Correct 2 ms 14684 KB Output is correct
34 Correct 1 ms 4444 KB Output is correct
35 Correct 1 ms 4444 KB Output is correct
36 Correct 1 ms 4444 KB Output is correct
37 Correct 1 ms 4444 KB Output is correct
38 Correct 1 ms 4444 KB Output is correct
39 Correct 1 ms 10588 KB Output is correct
40 Correct 39 ms 117284 KB Output is correct
41 Correct 261 ms 223988 KB Output is correct
42 Correct 40 ms 117304 KB Output is correct
43 Correct 257 ms 223980 KB Output is correct
44 Correct 10 ms 63832 KB Output is correct
45 Correct 285 ms 223732 KB Output is correct
46 Correct 264 ms 224012 KB Output is correct
47 Incorrect 11 ms 64092 KB 1st lines differ - on the 1st token, expected: '741526820812', found: '730934828993'
48 Halted 0 ms 0 KB -