oj.uz

Submission #947132

# Submission time Handle Problem Language Result Execution time Memory
947132 2024-03-15T14:40:22 Z Nhoksocqt1 Catfish Farm (IOI22_fish) C++17
18 / 100
 838 ms 769588 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 f[303][303][303], maxPre[3003][303], maxSuf[3003][303];
ll dp[3003][3003], sum[3003][3003];
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)
        dp[i][0] = dp[i][1] = dp[i][2] = -1e18;

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

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

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

ll sub5(void) {
    for (int i = 0; i < nSize; ++i) {
        for (int j = 0; j <= nSize; ++j)
            sum[i][j] = 0;
    }

    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] = f[i + 1][pcol][0] + sum[i][pcol] - sum[i][coln];
                    continue;
                }

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

        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 < 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 sub6(void) {
    for (int i = 0; i < nSize; ++i) {
        for (int j = 0; j <= nSize; ++j)
            sum[i][j] = 0;
    }

    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)
        dp[0][j] = -1e18;

    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 < nSize)
                maxSuf[j][k] = max(maxSuf[j][k], maxSuf[j][k + 1]);
        }
    }

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

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

        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 < 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();
                } /*else
                    if(nSize <= 3000) {
                        return sub6();
                    }*/
}

#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 << "SUB6: " << sub6() << '\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:269:1: warning: control reaches end of non-void function [-Wreturn-type]
  269 | }
      | ^

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 7664 KB Output is correct
2 Correct 36 ms 8392 KB Output is correct
3 Correct 2 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 94 ms 18012 KB Output is correct
6 Correct 97 ms 18268 KB Output is correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 49 ms 10580 KB Output is correct
3 Correct 68 ms 12372 KB Output is correct
4 Correct 24 ms 7768 KB Output is correct
5 Correct 36 ms 8268 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2500 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 24 ms 7772 KB Output is correct
13 Correct 30 ms 8392 KB Output is correct
14 Correct 24 ms 7796 KB Output is correct
15 Correct 29 ms 8044 KB Output is correct
16 Correct 27 ms 7672 KB Output is correct
17 Correct 28 ms 8028 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 18 ms 11092 KB Output is correct
4 Correct 12 ms 10072 KB Output is correct
5 Correct 29 ms 12484 KB Output is correct
6 Correct 26 ms 12124 KB Output is correct
7 Correct 28 ms 12640 KB Output is correct
8 Correct 29 ms 12624 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 10588 KB Output is correct
2 Correct 2 ms 10844 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Incorrect 2 ms 10588 KB 1st lines differ - on the 1st token, expected: '2', found: '1'
9 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 10588 KB Output is correct
2 Correct 2 ms 10844 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Incorrect 2 ms 10588 KB 1st lines differ - on the 1st token, expected: '2', found: '1'
9 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 10588 KB Output is correct
2 Correct 2 ms 10844 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Incorrect 2 ms 10588 KB 1st lines differ - on the 1st token, expected: '2', found: '1'
9 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 18 ms 11092 KB Output is correct
4 Correct 12 ms 10072 KB Output is correct
5 Correct 29 ms 12484 KB Output is correct
6 Correct 26 ms 12124 KB Output is correct
7 Correct 28 ms 12640 KB Output is correct
8 Correct 29 ms 12624 KB Output is correct
9 Runtime error 838 ms 769588 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 25 ms 7664 KB Output is correct
2 Correct 36 ms 8392 KB Output is correct
3 Correct 2 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 94 ms 18012 KB Output is correct
6 Correct 97 ms 18268 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 49 ms 10580 KB Output is correct
9 Correct 68 ms 12372 KB Output is correct
10 Correct 24 ms 7768 KB Output is correct
11 Correct 36 ms 8268 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 0 ms 2500 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 24 ms 7772 KB Output is correct
19 Correct 30 ms 8392 KB Output is correct
20 Correct 24 ms 7796 KB Output is correct
21 Correct 29 ms 8044 KB Output is correct
22 Correct 27 ms 7672 KB Output is correct
23 Correct 28 ms 8028 KB Output is correct
24 Correct 1 ms 2396 KB Output is correct
25 Correct 1 ms 6492 KB Output is correct
26 Correct 18 ms 11092 KB Output is correct
27 Correct 12 ms 10072 KB Output is correct
28 Correct 29 ms 12484 KB Output is correct
29 Correct 26 ms 12124 KB Output is correct
30 Correct 28 ms 12640 KB Output is correct
31 Correct 29 ms 12624 KB Output is correct
32 Correct 1 ms 10588 KB Output is correct
33 Correct 2 ms 10844 KB Output is correct
34 Correct 0 ms 2396 KB Output is correct
35 Correct 1 ms 2396 KB Output is correct
36 Correct 1 ms 2396 KB Output is correct
37 Correct 1 ms 2396 KB Output is correct
38 Correct 1 ms 2396 KB Output is correct
39 Incorrect 2 ms 10588 KB 1st lines differ - on the 1st token, expected: '2', found: '1'
40 Halted 0 ms 0 KB -