oj.uz

답안 #959975

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
959975 2024-04-09T11:33:12 Z LucaIlie 별자리 3 (JOI20_constellation3) C++17
35 / 100
 1398 ms 524288 KB 
#include <bits/stdc++.h>

using namespace std;

struct star {
    int i, j, c;
};

struct SegTree {
    struct node {
        long long maxx, lazy;
        int leftSon, rightSon;
    };

    int root, lst, rst;
    vector<node> segTree;

    int newNode() {
        int v = segTree.size();
        segTree.push_back( { 0, 0, -1, -1 } );
        return v;
    }

    void init( int l, int r ) {
        lst = l;
        rst = r;
        root = newNode();
    }

    void propag( int v, int l, int r ) {
        segTree[v].maxx += segTree[v].lazy;
        if ( l != r ) {
            if ( segTree[v].leftSon == -1 )
                segTree[v].leftSon = newNode();
            segTree[segTree[v].leftSon].lazy += segTree[v].lazy;
            if ( segTree[v].rightSon == -1 )
                segTree[v].rightSon = newNode();
            segTree[segTree[v].rightSon].lazy += segTree[v].lazy;
        }
        segTree[v].lazy = 0;
    }

    void updatePoint( int v, int l, int r, int p, long long x ) {
        propag( v, l, r );

        if ( l > p || r < p )
            return;

        if ( l == r ) {
            segTree[v].maxx = max( segTree[v].maxx, x );
            return;
        }

        int mid = (l + r) / 2;
        if ( segTree[v].leftSon == -1 )
            segTree[v].leftSon = newNode();
        updatePoint( segTree[v].leftSon, l, mid, p, x );
        if ( segTree[v].leftSon == -1 )
            segTree[v].leftSon = newNode();
        updatePoint( segTree[v].rightSon, mid + 1, r, p, x );


        segTree[v].maxx = max( segTree[segTree[v].leftSon].maxx, segTree[segTree[v].rightSon].maxx );
    }
    void updatePoint( int p, long long x ) {
        updatePoint( root, lst, rst, p, x );
    }

    void updateInterval( int v, int l, int r, int lu, int ru, long long x ) {
        propag( v, l, r );

        if ( l > ru || r < lu )
            return;

        if ( lu <= l && r <= ru ) {
            segTree[v].lazy = x;
            propag( v, l, r );
            return;
        }

        int mid = (l + r) / 2;
        if ( segTree[v].leftSon == -1 )
            segTree[v].leftSon = newNode();
        updateInterval( segTree[v].leftSon, l, mid, lu, ru, x );
        if ( segTree[v].leftSon == -1 )
            segTree[v].leftSon = newNode();
        updateInterval( segTree[v].rightSon, mid + 1, r, lu, ru, x );

        segTree[v].maxx = max( segTree[segTree[v].leftSon].maxx, segTree[segTree[v].rightSon].maxx );
    }
    void updateInterval( int l, int r, long long x ) {
        updateInterval( root, lst, rst, l, r, x );
    }

    long long query( int v, int l, int r, int lq, int rq ) {
        propag( v, l, r );

        if ( l > rq || r < lq )
            return 0;

        if ( lq <= l && r <= rq )
            return segTree[v].maxx;

        int mid = (l + r) / 2;
        long long a = (segTree[v].leftSon == -1 ? 0 : query( segTree[v].leftSon, l, mid, lq, rq ) );
        long long b = (segTree[v].rightSon == -1 ? 0 : query( segTree[v].rightSon, mid + 1, r, lq, rq ) );
        return max( a, b );
    }

    long long query( int r ) {
        return query( root, lst, rst, lst, r );
    }
};

const int MAX_N = 4e5;
const int MAX_M = 4e5;
int n;
int h[MAX_N + 2], parent[MAX_N + 2], leftSon[MAX_N + 2], rightSon[MAX_N + 2];
star stars[MAX_M];
vector<int> starsByColumn[MAX_N + 2];
vector<int> heights[MAX_N + 2];
SegTree ds[MAX_N + 2];

void calcCost( int v ) {
    ds[v].init( 0, n + 1 );

    if ( v == 0 )
        return;


    int l = leftSon[v], r = rightSon[v];
    calcCost( leftSon[v] );
    calcCost( rightSon[v] );

    if ( heights[l].size() < heights[r].size())
        swap( l, r );

    vector<pair<int, long long>> upd;
    heights[r].push_back( h[v] );
    for ( int x: heights[r] ) {
        if ( x <= h[v] )
            upd.push_back( { x, ds[l].query( x ) + ds[r].query( x ) } );
        else
            upd.push_back( { x, ds[l].query( h[v] ) + ds[r].query( x ) } );
    }

    swap( ds[v], ds[l] );
    swap( heights[v], heights[l] );

    for ( int x: heights[r] )
        heights[v].push_back( x );

    ds[v].updateInterval( h[v] + 1, n + 1, ds[r].query( h[v] ));
    for ( auto p: upd )
        ds[v].updatePoint( p.first, p.second );

    for ( int i: starsByColumn[v] ) {
        ds[v].updatePoint( stars[i].j, ds[v].query( h[v] ) + stars[i].c );
        heights[v].push_back( stars[i].j );
    }

    heights[l].clear();
    heights[r].clear();
    ds[l].segTree.clear();
    ds[r].segTree.clear();
}

signed main() {
    int m;
    long long total = 0;

    cin >> n;
    for ( int i = 1; i <= n; i++ )
        cin >> h[i];
    cin >> m;
    for ( int i = 0; i < m; i++ ) {
        cin >> stars[i].i >> stars[i].j >> stars[i].c;
        total += stars[i].c;
    }

    h[n + 1] = n + 1;
    vector<int> stack;
    for ( int i = 1; i <= n + 1; i++ ) {
        vector<int> path;
        while ( !stack.empty() && h[i] >= h[stack.back()] ) {
            path.push_back( stack.back() );
            stack.pop_back();
        }
        path.push_back( i );
        stack.push_back( i );

        for ( int j = 0; j < path.size() - 1; j++ )
            parent[path[j]] = path[j + 1];
    }

    for ( int v = 1; v <= n; v++ ) {
        if ( v < parent[v] )
            leftSon[parent[v]] = v;
        else
            rightSon[parent[v]] = v;
    }

    for ( int i = 0; i < m; i++ )
        starsByColumn[stars[i].i].push_back( i );

    calcCost( n + 1 );

    cout << total - ds[n + 1].query( n );

    return 0;
}

Compilation message

constellation3.cpp: In function 'int main()':
constellation3.cpp:192:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  192 |         for ( int j = 0; j < path.size() - 1; j++ )
      |                          ~~^~~~~~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 44124 KB Output is correct
2 Correct 11 ms 44176 KB Output is correct
3 Correct 10 ms 43984 KB Output is correct
4 Correct 11 ms 43992 KB Output is correct
5 Correct 11 ms 44124 KB Output is correct
6 Correct 10 ms 44124 KB Output is correct
7 Correct 11 ms 43972 KB Output is correct
8 Correct 13 ms 44408 KB Output is correct
9 Correct 11 ms 44124 KB Output is correct
10 Correct 10 ms 43864 KB Output is correct
11 Correct 10 ms 43840 KB Output is correct
12 Correct 10 ms 43868 KB Output is correct
13 Correct 11 ms 43972 KB Output is correct
14 Correct 10 ms 43864 KB Output is correct
15 Correct 10 ms 43868 KB Output is correct
16 Correct 10 ms 41564 KB Output is correct
17 Correct 10 ms 43608 KB Output is correct
18 Correct 10 ms 43868 KB Output is correct
19 Correct 10 ms 43608 KB Output is correct
20 Correct 11 ms 43612 KB Output is correct
21 Correct 10 ms 43868 KB Output is correct
22 Correct 10 ms 43608 KB Output is correct

Subtask #2
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 44124 KB Output is correct
2 Correct 11 ms 44176 KB Output is correct
3 Correct 10 ms 43984 KB Output is correct
4 Correct 11 ms 43992 KB Output is correct
5 Correct 11 ms 44124 KB Output is correct
6 Correct 10 ms 44124 KB Output is correct
7 Correct 11 ms 43972 KB Output is correct
8 Correct 13 ms 44408 KB Output is correct
9 Correct 11 ms 44124 KB Output is correct
10 Correct 10 ms 43864 KB Output is correct
11 Correct 10 ms 43840 KB Output is correct
12 Correct 10 ms 43868 KB Output is correct
13 Correct 11 ms 43972 KB Output is correct
14 Correct 10 ms 43864 KB Output is correct
15 Correct 10 ms 43868 KB Output is correct
16 Correct 10 ms 41564 KB Output is correct
17 Correct 10 ms 43608 KB Output is correct
18 Correct 10 ms 43868 KB Output is correct
19 Correct 10 ms 43608 KB Output is correct
20 Correct 11 ms 43612 KB Output is correct
21 Correct 10 ms 43868 KB Output is correct
22 Correct 10 ms 43608 KB Output is correct
23 Correct 25 ms 49492 KB Output is correct
24 Correct 26 ms 49440 KB Output is correct
25 Correct 26 ms 49500 KB Output is correct
26 Correct 26 ms 49756 KB Output is correct
27 Correct 27 ms 49500 KB Output is correct
28 Correct 25 ms 49688 KB Output is correct
29 Correct 25 ms 49672 KB Output is correct
30 Correct 27 ms 50200 KB Output is correct
31 Correct 25 ms 49756 KB Output is correct
32 Correct 16 ms 45812 KB Output is correct
33 Correct 18 ms 46172 KB Output is correct
34 Correct 18 ms 46172 KB Output is correct
35 Correct 18 ms 46424 KB Output is correct
36 Correct 15 ms 44632 KB Output is correct
37 Correct 16 ms 44380 KB Output is correct
38 Correct 14 ms 42332 KB Output is correct
39 Correct 20 ms 44632 KB Output is correct
40 Correct 16 ms 44892 KB Output is correct
41 Correct 20 ms 44632 KB Output is correct
42 Correct 20 ms 44636 KB Output is correct
43 Correct 17 ms 44888 KB Output is correct
44 Correct 20 ms 44632 KB Output is correct

Subtask #3
0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 44124 KB Output is correct
2 Correct 11 ms 44176 KB Output is correct
3 Correct 10 ms 43984 KB Output is correct
4 Correct 11 ms 43992 KB Output is correct
5 Correct 11 ms 44124 KB Output is correct
6 Correct 10 ms 44124 KB Output is correct
7 Correct 11 ms 43972 KB Output is correct
8 Correct 13 ms 44408 KB Output is correct
9 Correct 11 ms 44124 KB Output is correct
10 Correct 10 ms 43864 KB Output is correct
11 Correct 10 ms 43840 KB Output is correct
12 Correct 10 ms 43868 KB Output is correct
13 Correct 11 ms 43972 KB Output is correct
14 Correct 10 ms 43864 KB Output is correct
15 Correct 10 ms 43868 KB Output is correct
16 Correct 10 ms 41564 KB Output is correct
17 Correct 10 ms 43608 KB Output is correct
18 Correct 10 ms 43868 KB Output is correct
19 Correct 10 ms 43608 KB Output is correct
20 Correct 11 ms 43612 KB Output is correct
21 Correct 10 ms 43868 KB Output is correct
22 Correct 10 ms 43608 KB Output is correct
23 Correct 25 ms 49492 KB Output is correct
24 Correct 26 ms 49440 KB Output is correct
25 Correct 26 ms 49500 KB Output is correct
26 Correct 26 ms 49756 KB Output is correct
27 Correct 27 ms 49500 KB Output is correct
28 Correct 25 ms 49688 KB Output is correct
29 Correct 25 ms 49672 KB Output is correct
30 Correct 27 ms 50200 KB Output is correct
31 Correct 25 ms 49756 KB Output is correct
32 Correct 16 ms 45812 KB Output is correct
33 Correct 18 ms 46172 KB Output is correct
34 Correct 18 ms 46172 KB Output is correct
35 Correct 18 ms 46424 KB Output is correct
36 Correct 15 ms 44632 KB Output is correct
37 Correct 16 ms 44380 KB Output is correct
38 Correct 14 ms 42332 KB Output is correct
39 Correct 20 ms 44632 KB Output is correct
40 Correct 16 ms 44892 KB Output is correct
41 Correct 20 ms 44632 KB Output is correct
42 Correct 20 ms 44636 KB Output is correct
43 Correct 17 ms 44888 KB Output is correct
44 Correct 20 ms 44632 KB Output is correct
45 Runtime error 1398 ms 524288 KB Execution killed with signal 9
46 Halted 0 ms 0 KB -