oj.uz

Submission #404480

# Submission time Handle Problem Language Result Execution time Memory
404480 2021-05-14T13:20:08 Z fvogel499 Tug of War (BOI15_tug) C++14
71 / 100
 148 ms 10892 KB 
#include <iostream>
#include <cmath>
#include <vector>
#include <bitset>
#include <queue>
#include <cstring>
#include <set>
#include <unordered_set>
#include <map>
#include <unordered_map>
#include <algorithm>
#include <cassert>

using namespace std;

#define pii pair<int, int>
#define f first
#define s second

#define ll long long
#define rint int32_t

const int siz = 60001;

bitset<siz> bit;

// ifstream cin("tug.in");
// ofstream cout("tug.out");

struct Edge {
    Edge(int lNA, int lNB, int lStrength) {
        nA = lNA;
        nB = lNB;
        strength = lStrength;
    }
    int nA, nB, strength;
};

rint main() {
    int n, tolerance;
    cin >> n >> tolerance;

    set<Edge*> graph [2*n];
    for (int i = 0; i < 2*n; i++) {
        int l, r, ls;
        cin >> l >> r >> ls;
        l--;
        r--;
        r += n;
        Edge* e = new Edge(l, r, ls);
        graph[l].insert(e);
        graph[r].insert(e);
    }

    int desequilibrium = 0;
    bool proc [2*n];
    for (int i = 0; i < 2*n; i++) proc[i] = false;
    queue<int> q;
    for (int i = 0; i < 2*n; i++) {
        if (graph[i].size() == 1) {
            q.push(i);
        }
    }
    while (!q.empty()) {
        int curNode = q.front();
        q.pop();
        if (proc[curNode] or graph[curNode].empty()) continue;
        proc[curNode] = true;
        if (curNode < n) {
            desequilibrium += (*(graph[curNode].begin()))->strength; 
        }
        else {
            desequilibrium -= (*(graph[curNode].begin()))->strength;
        }
        int newNode = (*(graph[curNode].begin()))->nA;
        if (newNode == curNode) newNode = (*(graph[curNode].begin()))->nB;
        graph[newNode].erase(graph[newNode].find(*(graph[curNode].begin())));
        graph[curNode].clear();
        if (graph[newNode].size() == 1) {
            q.push(newNode);
        }
    }
    desequilibrium = max(desequilibrium, -desequilibrium);

    for (int i = 0; i < 2*n; i++) {
        if (!proc[i] and graph[i].size() == 0) {
            cout << "NO";
            return 0;
        }
    }

    vector<int> desequilibriums;
    desequilibriums.push_back(desequilibrium);
    int desequilibriumsSum = desequilibrium;
    for (int i = 0; i < 2*n; i++) {
        if (proc[i]) continue;
        int locDesiquilibrium = 0;
        int curNode = i;
        int parentNode = -1;
        int step = 1;
        while (!proc[curNode]) {
            proc[curNode] = true;
            int newNode = (*(graph[curNode].begin()))->nA;
            if (newNode == curNode) newNode = (*(graph[curNode].begin()))->nB;
            if (newNode == parentNode) {
                newNode = (*(next(graph[curNode].begin())))->nA;
                if (newNode == curNode) newNode = (*(next(graph[curNode].begin())))->nB;
                locDesiquilibrium += step*(*(next(graph[curNode].begin())))->strength;
            }
            else {
                locDesiquilibrium += step*(*(graph[curNode].begin()))->strength;
            }
            if (step == 1) step = -1;
            else step = 1;
            parentNode = curNode;
            curNode = newNode;
        }
        locDesiquilibrium = max(locDesiquilibrium, -locDesiquilibrium);
        desequilibriums.push_back(locDesiquilibrium);
        desequilibriumsSum += locDesiquilibrium;
    }

    bit = bitset<siz>(0);
    bit[0] = 1;
    for (int i : desequilibriums) {
        bit |= bit<<i;
    }

    for (int i = 0; i < siz; i++) if (bit[i] and abs(i-(desequilibriumsSum-i)) <= tolerance) {
        cout << "YES";
        return 0;
    }

    cout << "NO";
    return 0;
}

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 9 ms 972 KB Output is correct
27 Correct 5 ms 972 KB Output is correct
28 Correct 9 ms 972 KB Output is correct
29 Correct 6 ms 972 KB Output is correct
30 Correct 9 ms 1016 KB Output is correct
31 Correct 6 ms 972 KB Output is correct
32 Correct 9 ms 1020 KB Output is correct
33 Correct 5 ms 972 KB Output is correct
34 Correct 5 ms 972 KB Output is correct
35 Correct 6 ms 972 KB Output is correct
36 Correct 9 ms 972 KB Output is correct
37 Correct 6 ms 972 KB Output is correct
38 Correct 10 ms 972 KB Output is correct
39 Correct 6 ms 972 KB Output is correct
40 Correct 9 ms 972 KB Output is correct
41 Correct 6 ms 972 KB Output is correct
42 Correct 9 ms 972 KB Output is correct
43 Correct 6 ms 932 KB Output is correct
44 Correct 10 ms 972 KB Output is correct
45 Correct 6 ms 1004 KB Output is correct
46 Correct 9 ms 1016 KB Output is correct
47 Correct 5 ms 972 KB Output is correct
48 Correct 7 ms 972 KB Output is correct
49 Correct 7 ms 972 KB Output is correct
50 Correct 11 ms 1016 KB Output is correct
51 Correct 9 ms 972 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 3752 KB Output is correct
2 Correct 24 ms 3772 KB Output is correct
3 Correct 35 ms 3808 KB Output is correct
4 Correct 23 ms 3672 KB Output is correct
5 Correct 34 ms 3788 KB Output is correct
6 Correct 25 ms 3660 KB Output is correct
7 Correct 36 ms 3876 KB Output is correct
8 Correct 25 ms 3768 KB Output is correct
9 Correct 37 ms 3880 KB Output is correct
10 Correct 24 ms 3776 KB Output is correct
11 Correct 34 ms 3832 KB Output is correct
12 Correct 25 ms 3788 KB Output is correct
13 Correct 39 ms 3836 KB Output is correct
14 Correct 36 ms 3860 KB Output is correct
15 Correct 24 ms 3732 KB Output is correct
16 Correct 35 ms 3844 KB Output is correct
17 Correct 24 ms 3784 KB Output is correct
18 Correct 34 ms 3784 KB Output is correct
19 Correct 26 ms 3788 KB Output is correct
20 Correct 40 ms 3808 KB Output is correct
21 Correct 25 ms 3712 KB Output is correct
22 Correct 30 ms 3728 KB Output is correct

Subtask #4
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 9 ms 972 KB Output is correct
27 Correct 5 ms 972 KB Output is correct
28 Correct 9 ms 972 KB Output is correct
29 Correct 6 ms 972 KB Output is correct
30 Correct 9 ms 1016 KB Output is correct
31 Correct 6 ms 972 KB Output is correct
32 Correct 9 ms 1020 KB Output is correct
33 Correct 5 ms 972 KB Output is correct
34 Correct 5 ms 972 KB Output is correct
35 Correct 6 ms 972 KB Output is correct
36 Correct 9 ms 972 KB Output is correct
37 Correct 6 ms 972 KB Output is correct
38 Correct 10 ms 972 KB Output is correct
39 Correct 6 ms 972 KB Output is correct
40 Correct 9 ms 972 KB Output is correct
41 Correct 6 ms 972 KB Output is correct
42 Correct 9 ms 972 KB Output is correct
43 Correct 6 ms 932 KB Output is correct
44 Correct 10 ms 972 KB Output is correct
45 Correct 6 ms 1004 KB Output is correct
46 Correct 9 ms 1016 KB Output is correct
47 Correct 5 ms 972 KB Output is correct
48 Correct 7 ms 972 KB Output is correct
49 Correct 7 ms 972 KB Output is correct
50 Correct 11 ms 1016 KB Output is correct
51 Correct 9 ms 972 KB Output is correct
52 Correct 35 ms 3752 KB Output is correct
53 Correct 24 ms 3772 KB Output is correct
54 Correct 35 ms 3808 KB Output is correct
55 Correct 23 ms 3672 KB Output is correct
56 Correct 34 ms 3788 KB Output is correct
57 Correct 25 ms 3660 KB Output is correct
58 Correct 36 ms 3876 KB Output is correct
59 Correct 25 ms 3768 KB Output is correct
60 Correct 37 ms 3880 KB Output is correct
61 Correct 24 ms 3776 KB Output is correct
62 Correct 34 ms 3832 KB Output is correct
63 Correct 25 ms 3788 KB Output is correct
64 Correct 39 ms 3836 KB Output is correct
65 Correct 36 ms 3860 KB Output is correct
66 Correct 24 ms 3732 KB Output is correct
67 Correct 35 ms 3844 KB Output is correct
68 Correct 24 ms 3784 KB Output is correct
69 Correct 34 ms 3784 KB Output is correct
70 Correct 26 ms 3788 KB Output is correct
71 Correct 40 ms 3808 KB Output is correct
72 Correct 25 ms 3712 KB Output is correct
73 Correct 30 ms 3728 KB Output is correct
74 Correct 148 ms 10864 KB Output is correct
75 Correct 90 ms 10600 KB Output is correct
76 Correct 147 ms 10892 KB Output is correct
77 Correct 91 ms 10636 KB Output is correct
78 Incorrect 141 ms 10884 KB Output isn't correct
79 Halted 0 ms 0 KB -