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답안 #1030468

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1030468 2024-07-22T05:32:37 Z thinknoexit Graph (BOI20_graph) C++17
58 / 100
 700 ms 17100 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int N = 100100;
struct A {
    int v, w;
};
vector<A> adj[N];
double ans[N];
bool ch[N], vis[N];
int col[N], bp = 0;
vector<pair<int, int>> cycle;
void dfs(int v, vector<int>& node) {
    node.push_back(v);
    vis[v] = 1;
    for (auto& x : adj[v]) {
        if (!vis[x.v]) dfs(x.v, node);
    }
}
void dfs_ans(int v) {
    for (auto& x : adj[v]) {
        if (!ch[x.v]) {
            ch[x.v] = 1;
            ans[x.v] = x.w - ans[v];
            dfs_ans(x.v);
        }
    }
}
bool bipartite(int v, int c) {
    if (col[v]) {
        if (col[v] != c) return bp = v, false;
        else return true;
    }
    col[v] = c;
    for (auto& x : adj[v]) {
        if (!bipartite(x.v, 3 - c)) {
            if (bp != 0) cycle.push_back({ v, x.w });
            if (v == bp) bp = 0;
            return false;
        }
    }
    return true;
}
int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    int n, m;
    cin >> n >> m;
    for (int i = 1;i <= m;i++) {
        int u, v, w;
        cin >> u >> v >> w;
        adj[u].push_back({ v, w });
        adj[v].push_back({ u, w });
    }
    for (int i = 1;i <= n;i++) {
        if (vis[i]) continue;
        vector<int> node;
        dfs(i, node);
        bool bipar = bipartite(i, 1);
        if (!bipar) {
            vector<pair<int, int>> c = cycle;
            cycle.clear();
            int root = c.back().first;
            int val = 0;
            for (int i = 0;i < (int)c.size();i++) {
                if (i & 1) val -= c[i].second;
                else val += c[i].second;
            }
            // value at node (root) = val / 2
            ch[root] = 1;
            ans[root] = (double)val / 2;
            dfs_ans(root);
            continue;
        }
        if ((int)node.size() == 1) {
            continue;
        }
        // try V
        double mn = 1e9;
        int idx = -100;
        for (int V = -80;V <= 80;V++) {
            ch[i] = 1;
            ans[i] = (double)V / 2;
            dfs_ans(i);
            double sum = 0;
            bool can = 1;
            for (auto& i : node) {
                ch[i] = 0;
                sum += abs(ans[i]);
                for (auto& x : adj[i]) {
                    if (ans[i] + ans[x.v] != x.w) {
                        can = 0;
                        break;
                    }
                }
                if (!can) break;
            }
            if (can) {
                if (sum < mn) {
                    mn = sum;
                    idx = V;
                }
            }
        }
        if (mn == 1e9) {
            cout << "NO";
            return 0;
        }
        ch[i] = 1;
        ans[i] = (double)idx / 2;
        dfs_ans(i);
    }
    for (int i = 1;i <= n;i++) {
        for (auto& x : adj[i]) {
            if (ans[i] + ans[x.v] != x.w) {
                cout << "NO";
                return 0;
            }
        }
    }
    cout << "YES\n";
    for (int i = 1;i <= n;i++) {
        cout << ans[i] << ' ';
    }
    return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2652 KB answer = YES
2 Correct 1 ms 2652 KB answer = YES
3 Correct 1 ms 2652 KB answer = YES
4 Correct 1 ms 2652 KB answer = NO
5 Correct 1 ms 2652 KB answer = YES
6 Correct 1 ms 2652 KB answer = YES
7 Correct 1 ms 2652 KB answer = YES
8 Correct 1 ms 2652 KB answer = YES
9 Correct 1 ms 2652 KB answer = NO
10 Correct 1 ms 2652 KB answer = YES
11 Correct 1 ms 2648 KB answer = YES
12 Correct 2 ms 2652 KB answer = NO
13 Correct 1 ms 2652 KB answer = YES
14 Correct 2 ms 2648 KB answer = YES
15 Correct 1 ms 2652 KB answer = YES
16 Correct 1 ms 2652 KB answer = YES
17 Correct 1 ms 2652 KB answer = YES
18 Correct 1 ms 2652 KB answer = YES
19 Correct 1 ms 2652 KB answer = YES
20 Correct 1 ms 2648 KB answer = YES
21 Correct 1 ms 2652 KB answer = YES
22 Correct 1 ms 2652 KB answer = NO
23 Correct 1 ms 2652 KB answer = NO

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2652 KB answer = YES
2 Correct 1 ms 2652 KB answer = YES
3 Correct 1 ms 2652 KB answer = YES
4 Correct 1 ms 2652 KB answer = NO
5 Correct 1 ms 2652 KB answer = YES
6 Correct 1 ms 2652 KB answer = YES
7 Correct 1 ms 2652 KB answer = YES
8 Correct 1 ms 2652 KB answer = YES
9 Correct 1 ms 2652 KB answer = NO
10 Correct 1 ms 2652 KB answer = YES
11 Correct 1 ms 2648 KB answer = YES
12 Correct 2 ms 2652 KB answer = NO
13 Correct 1 ms 2652 KB answer = YES
14 Correct 2 ms 2648 KB answer = YES
15 Correct 1 ms 2652 KB answer = YES
16 Correct 1 ms 2652 KB answer = YES
17 Correct 1 ms 2652 KB answer = YES
18 Correct 1 ms 2652 KB answer = YES
19 Correct 1 ms 2652 KB answer = YES
20 Correct 1 ms 2648 KB answer = YES
21 Correct 1 ms 2652 KB answer = YES
22 Correct 1 ms 2652 KB answer = NO
23 Correct 1 ms 2652 KB answer = NO
24 Correct 1 ms 2652 KB answer = YES
25 Correct 2 ms 2652 KB answer = YES
26 Correct 1 ms 2652 KB answer = YES
27 Correct 1 ms 2648 KB answer = YES
28 Correct 1 ms 2648 KB answer = YES
29 Correct 2 ms 2652 KB answer = YES
30 Correct 1 ms 2832 KB answer = NO
31 Correct 1 ms 2652 KB answer = YES
32 Correct 1 ms 2672 KB answer = YES
33 Correct 1 ms 2652 KB answer = YES
34 Correct 1 ms 2652 KB answer = YES
35 Correct 1 ms 2648 KB answer = YES
36 Correct 2 ms 2648 KB answer = YES

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2652 KB answer = YES
2 Correct 1 ms 2652 KB answer = YES
3 Correct 1 ms 2652 KB answer = YES
4 Correct 1 ms 2652 KB answer = NO
5 Correct 1 ms 2652 KB answer = YES
6 Correct 1 ms 2652 KB answer = YES
7 Correct 1 ms 2652 KB answer = YES
8 Correct 1 ms 2652 KB answer = YES
9 Correct 1 ms 2652 KB answer = NO
10 Correct 1 ms 2652 KB answer = YES
11 Correct 1 ms 2648 KB answer = YES
12 Correct 2 ms 2652 KB answer = NO
13 Correct 1 ms 2652 KB answer = YES
14 Correct 2 ms 2648 KB answer = YES
15 Correct 1 ms 2652 KB answer = YES
16 Correct 1 ms 2652 KB answer = YES
17 Correct 1 ms 2652 KB answer = YES
18 Correct 1 ms 2652 KB answer = YES
19 Correct 1 ms 2652 KB answer = YES
20 Correct 1 ms 2648 KB answer = YES
21 Correct 1 ms 2652 KB answer = YES
22 Correct 1 ms 2652 KB answer = NO
23 Correct 1 ms 2652 KB answer = NO
24 Correct 1 ms 2652 KB answer = YES
25 Correct 2 ms 2652 KB answer = YES
26 Correct 1 ms 2652 KB answer = YES
27 Correct 1 ms 2648 KB answer = YES
28 Correct 1 ms 2648 KB answer = YES
29 Correct 2 ms 2652 KB answer = YES
30 Correct 1 ms 2832 KB answer = NO
31 Correct 1 ms 2652 KB answer = YES
32 Correct 1 ms 2672 KB answer = YES
33 Correct 1 ms 2652 KB answer = YES
34 Correct 1 ms 2652 KB answer = YES
35 Correct 1 ms 2648 KB answer = YES
36 Correct 2 ms 2648 KB answer = YES
37 Correct 2 ms 2648 KB answer = YES
38 Correct 1 ms 2652 KB answer = YES
39 Correct 4 ms 2652 KB answer = YES
40 Correct 2 ms 2652 KB answer = YES
41 Correct 1 ms 2652 KB answer = NO
42 Correct 4 ms 2652 KB answer = YES
43 Correct 3 ms 2652 KB answer = YES
44 Correct 3 ms 2652 KB answer = YES
45 Correct 1 ms 2652 KB answer = YES
46 Correct 2 ms 2652 KB answer = YES
47 Correct 2 ms 2652 KB answer = YES
48 Correct 2 ms 2652 KB answer = YES

Subtask #4
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2652 KB answer = YES
2 Correct 1 ms 2652 KB answer = YES
3 Correct 1 ms 2652 KB answer = YES
4 Correct 1 ms 2652 KB answer = NO
5 Correct 1 ms 2652 KB answer = YES
6 Correct 1 ms 2652 KB answer = YES
7 Correct 1 ms 2652 KB answer = YES
8 Correct 1 ms 2652 KB answer = YES
9 Correct 1 ms 2652 KB answer = NO
10 Correct 1 ms 2652 KB answer = YES
11 Correct 1 ms 2648 KB answer = YES
12 Correct 2 ms 2652 KB answer = NO
13 Correct 1 ms 2652 KB answer = YES
14 Correct 2 ms 2648 KB answer = YES
15 Correct 1 ms 2652 KB answer = YES
16 Correct 1 ms 2652 KB answer = YES
17 Correct 1 ms 2652 KB answer = YES
18 Correct 1 ms 2652 KB answer = YES
19 Correct 1 ms 2652 KB answer = YES
20 Correct 1 ms 2648 KB answer = YES
21 Correct 1 ms 2652 KB answer = YES
22 Correct 1 ms 2652 KB answer = NO
23 Correct 1 ms 2652 KB answer = NO
24 Correct 1 ms 2652 KB answer = YES
25 Correct 2 ms 2652 KB answer = YES
26 Correct 1 ms 2652 KB answer = YES
27 Correct 1 ms 2648 KB answer = YES
28 Correct 1 ms 2648 KB answer = YES
29 Correct 2 ms 2652 KB answer = YES
30 Correct 1 ms 2832 KB answer = NO
31 Correct 1 ms 2652 KB answer = YES
32 Correct 1 ms 2672 KB answer = YES
33 Correct 1 ms 2652 KB answer = YES
34 Correct 1 ms 2652 KB answer = YES
35 Correct 1 ms 2648 KB answer = YES
36 Correct 2 ms 2648 KB answer = YES
37 Correct 2 ms 2648 KB answer = YES
38 Correct 1 ms 2652 KB answer = YES
39 Correct 4 ms 2652 KB answer = YES
40 Correct 2 ms 2652 KB answer = YES
41 Correct 1 ms 2652 KB answer = NO
42 Correct 4 ms 2652 KB answer = YES
43 Correct 3 ms 2652 KB answer = YES
44 Correct 3 ms 2652 KB answer = YES
45 Correct 1 ms 2652 KB answer = YES
46 Correct 2 ms 2652 KB answer = YES
47 Correct 2 ms 2652 KB answer = YES
48 Correct 2 ms 2652 KB answer = YES
49 Correct 46 ms 3420 KB answer = YES
50 Correct 6 ms 3672 KB answer = YES
51 Correct 33 ms 3728 KB answer = YES
52 Correct 4 ms 3672 KB answer = NO
53 Correct 3 ms 2652 KB answer = YES
54 Correct 5 ms 2972 KB answer = YES
55 Correct 15 ms 3144 KB answer = YES
56 Correct 45 ms 3424 KB answer = YES
57 Correct 22 ms 3340 KB answer = YES
58 Correct 24 ms 3244 KB answer = YES
59 Correct 6 ms 3308 KB answer = YES
60 Correct 37 ms 3404 KB answer = YES
61 Correct 3 ms 2908 KB answer = YES
62 Correct 32 ms 7988 KB answer = NO
63 Correct 34 ms 8016 KB answer = YES
64 Correct 34 ms 8016 KB answer = NO
65 Correct 32 ms 8032 KB answer = YES
66 Correct 4 ms 2908 KB answer = YES

Subtask #5
0 / 42.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2652 KB answer = YES
2 Correct 1 ms 2652 KB answer = YES
3 Correct 1 ms 2652 KB answer = YES
4 Correct 1 ms 2652 KB answer = NO
5 Correct 1 ms 2652 KB answer = YES
6 Correct 1 ms 2652 KB answer = YES
7 Correct 1 ms 2652 KB answer = YES
8 Correct 1 ms 2652 KB answer = YES
9 Correct 1 ms 2652 KB answer = NO
10 Correct 1 ms 2652 KB answer = YES
11 Correct 1 ms 2648 KB answer = YES
12 Correct 2 ms 2652 KB answer = NO
13 Correct 1 ms 2652 KB answer = YES
14 Correct 2 ms 2648 KB answer = YES
15 Correct 1 ms 2652 KB answer = YES
16 Correct 1 ms 2652 KB answer = YES
17 Correct 1 ms 2652 KB answer = YES
18 Correct 1 ms 2652 KB answer = YES
19 Correct 1 ms 2652 KB answer = YES
20 Correct 1 ms 2648 KB answer = YES
21 Correct 1 ms 2652 KB answer = YES
22 Correct 1 ms 2652 KB answer = NO
23 Correct 1 ms 2652 KB answer = NO
24 Correct 1 ms 2652 KB answer = YES
25 Correct 2 ms 2652 KB answer = YES
26 Correct 1 ms 2652 KB answer = YES
27 Correct 1 ms 2648 KB answer = YES
28 Correct 1 ms 2648 KB answer = YES
29 Correct 2 ms 2652 KB answer = YES
30 Correct 1 ms 2832 KB answer = NO
31 Correct 1 ms 2652 KB answer = YES
32 Correct 1 ms 2672 KB answer = YES
33 Correct 1 ms 2652 KB answer = YES
34 Correct 1 ms 2652 KB answer = YES
35 Correct 1 ms 2648 KB answer = YES
36 Correct 2 ms 2648 KB answer = YES
37 Correct 2 ms 2648 KB answer = YES
38 Correct 1 ms 2652 KB answer = YES
39 Correct 4 ms 2652 KB answer = YES
40 Correct 2 ms 2652 KB answer = YES
41 Correct 1 ms 2652 KB answer = NO
42 Correct 4 ms 2652 KB answer = YES
43 Correct 3 ms 2652 KB answer = YES
44 Correct 3 ms 2652 KB answer = YES
45 Correct 1 ms 2652 KB answer = YES
46 Correct 2 ms 2652 KB answer = YES
47 Correct 2 ms 2652 KB answer = YES
48 Correct 2 ms 2652 KB answer = YES
49 Correct 46 ms 3420 KB answer = YES
50 Correct 6 ms 3672 KB answer = YES
51 Correct 33 ms 3728 KB answer = YES
52 Correct 4 ms 3672 KB answer = NO
53 Correct 3 ms 2652 KB answer = YES
54 Correct 5 ms 2972 KB answer = YES
55 Correct 15 ms 3144 KB answer = YES
56 Correct 45 ms 3424 KB answer = YES
57 Correct 22 ms 3340 KB answer = YES
58 Correct 24 ms 3244 KB answer = YES
59 Correct 6 ms 3308 KB answer = YES
60 Correct 37 ms 3404 KB answer = YES
61 Correct 3 ms 2908 KB answer = YES
62 Correct 32 ms 7988 KB answer = NO
63 Correct 34 ms 8016 KB answer = YES
64 Correct 34 ms 8016 KB answer = NO
65 Correct 32 ms 8032 KB answer = YES
66 Correct 4 ms 2908 KB answer = YES
67 Correct 203 ms 14036 KB answer = YES
68 Correct 217 ms 14028 KB answer = YES
69 Correct 43 ms 15696 KB answer = YES
70 Correct 66 ms 17100 KB answer = YES
71 Correct 45 ms 15444 KB answer = YES
72 Correct 599 ms 8400 KB answer = YES
73 Correct 47 ms 9676 KB answer = YES
74 Correct 33 ms 10200 KB answer = YES
75 Correct 20 ms 10200 KB answer = NO
76 Correct 59 ms 3680 KB answer = YES
77 Correct 127 ms 4612 KB answer = YES
78 Correct 237 ms 5856 KB answer = YES
79 Correct 502 ms 8660 KB answer = YES
80 Correct 290 ms 10200 KB answer = YES
81 Correct 27 ms 12888 KB answer = NO
82 Correct 54 ms 15704 KB answer = YES
83 Correct 85 ms 16972 KB answer = YES
84 Execution timed out 884 ms 15328 KB Time limit exceeded
85 Halted 0 ms 0 KB -