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답안 #745424

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
745424 2023-05-20T04:54:24 Z MilosMilutinovic Graph (BOI20_graph) C++14
100 / 100
 144 ms 23124 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 10;
int n, m, coeff[N], delta[N];
double ans[N], val;
vector<pair<int, int>> g[N];
vector<int> comp;
bool ok = true, found, was[N];
void dfs(int x) {
    was[x] = true;
    comp.push_back(x);
    for (auto& p : g[x]) {
        int y = p.first;
        int w = p.second;
        if (was[y]) {
            if (-coeff[y] == coeff[x]) {
                ok = (ok & ((w - delta[y]) == delta[x]));
            } else {
                found = true;
                val = (w - delta[x] - delta[y]) * 1.0 / (coeff[y] + coeff[x]);
            }
            continue;
        }
        coeff[y] = -coeff[x];
        delta[y] = w - delta[x];
        dfs(y);
    }
}
int main() {
    scanf("%d%d", &n, &m);
    for (int i = 1; i <= m; i++) {
        int a, b, c;
        scanf("%d%d%d", &a, &b, &c);
        g[a].emplace_back(b, c);
        g[b].emplace_back(a, c);
    }
    for (int i = 1; i <= n; i++) if (!was[i]) {
        coeff[i] = 1;
        delta[i] = 0;
        comp.clear();
        found = false;
        dfs(i);
        if (!ok) break;
        if (found) {
            for (int x : comp) ans[x] = val * coeff[x] + delta[x];
        } else {
            vector<int> f;
            for (int x : comp) f.push_back(delta[x] * coeff[x]);
            sort(f.begin(), f.end());
            val = -f[(int) f.size() / 2];
            for (int x : comp) ans[x] = val * coeff[x] + delta[x];
        }
    }
    for (int i = 1; i <= n; i++) {
        for (auto& p : g[i]) {
            if (ans[i] + ans[p.first] != p.second * 1.0) ok = false;
        }
    }
    if (!ok) { printf("NO"); return 0; }
    printf("YES\n");
    for (int i = 1; i <= n; i++) printf("%0.5lf ", ans[i]);
    return 0;
}

Compilation message

Graph.cpp: In function 'int main()':
Graph.cpp:30:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     scanf("%d%d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~
Graph.cpp:33:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |         scanf("%d%d%d", &a, &b, &c);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4948 KB answer = YES
2 Correct 3 ms 4948 KB answer = YES
3 Correct 3 ms 5012 KB answer = YES
4 Correct 3 ms 4948 KB answer = NO
5 Correct 3 ms 4948 KB answer = YES
6 Correct 3 ms 4948 KB answer = YES
7 Correct 3 ms 4948 KB answer = YES
8 Correct 3 ms 4948 KB answer = YES
9 Correct 3 ms 5020 KB answer = NO
10 Correct 2 ms 4948 KB answer = YES
11 Correct 3 ms 4948 KB answer = YES
12 Correct 3 ms 5076 KB answer = NO
13 Correct 4 ms 4948 KB answer = YES
14 Correct 3 ms 4948 KB answer = YES
15 Correct 3 ms 5012 KB answer = YES
16 Correct 3 ms 5012 KB answer = YES
17 Correct 3 ms 5016 KB answer = YES
18 Correct 2 ms 4948 KB answer = YES
19 Correct 3 ms 4948 KB answer = YES
20 Correct 3 ms 4948 KB answer = YES
21 Correct 3 ms 4948 KB answer = YES
22 Correct 3 ms 4948 KB answer = NO
23 Correct 3 ms 4948 KB answer = NO

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4948 KB answer = YES
2 Correct 3 ms 4948 KB answer = YES
3 Correct 3 ms 5012 KB answer = YES
4 Correct 3 ms 4948 KB answer = NO
5 Correct 3 ms 4948 KB answer = YES
6 Correct 3 ms 4948 KB answer = YES
7 Correct 3 ms 4948 KB answer = YES
8 Correct 3 ms 4948 KB answer = YES
9 Correct 3 ms 5020 KB answer = NO
10 Correct 2 ms 4948 KB answer = YES
11 Correct 3 ms 4948 KB answer = YES
12 Correct 3 ms 5076 KB answer = NO
13 Correct 4 ms 4948 KB answer = YES
14 Correct 3 ms 4948 KB answer = YES
15 Correct 3 ms 5012 KB answer = YES
16 Correct 3 ms 5012 KB answer = YES
17 Correct 3 ms 5016 KB answer = YES
18 Correct 2 ms 4948 KB answer = YES
19 Correct 3 ms 4948 KB answer = YES
20 Correct 3 ms 4948 KB answer = YES
21 Correct 3 ms 4948 KB answer = YES
22 Correct 3 ms 4948 KB answer = NO
23 Correct 3 ms 4948 KB answer = NO
24 Correct 3 ms 5016 KB answer = YES
25 Correct 4 ms 4948 KB answer = YES
26 Correct 3 ms 4948 KB answer = YES
27 Correct 4 ms 5016 KB answer = YES
28 Correct 3 ms 4948 KB answer = YES
29 Correct 3 ms 4948 KB answer = YES
30 Correct 3 ms 5016 KB answer = NO
31 Correct 3 ms 4948 KB answer = YES
32 Correct 3 ms 5016 KB answer = YES
33 Correct 3 ms 4948 KB answer = YES
34 Correct 3 ms 4948 KB answer = YES
35 Correct 4 ms 5016 KB answer = YES
36 Correct 3 ms 4948 KB answer = YES

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4948 KB answer = YES
2 Correct 3 ms 4948 KB answer = YES
3 Correct 3 ms 5012 KB answer = YES
4 Correct 3 ms 4948 KB answer = NO
5 Correct 3 ms 4948 KB answer = YES
6 Correct 3 ms 4948 KB answer = YES
7 Correct 3 ms 4948 KB answer = YES
8 Correct 3 ms 4948 KB answer = YES
9 Correct 3 ms 5020 KB answer = NO
10 Correct 2 ms 4948 KB answer = YES
11 Correct 3 ms 4948 KB answer = YES
12 Correct 3 ms 5076 KB answer = NO
13 Correct 4 ms 4948 KB answer = YES
14 Correct 3 ms 4948 KB answer = YES
15 Correct 3 ms 5012 KB answer = YES
16 Correct 3 ms 5012 KB answer = YES
17 Correct 3 ms 5016 KB answer = YES
18 Correct 2 ms 4948 KB answer = YES
19 Correct 3 ms 4948 KB answer = YES
20 Correct 3 ms 4948 KB answer = YES
21 Correct 3 ms 4948 KB answer = YES
22 Correct 3 ms 4948 KB answer = NO
23 Correct 3 ms 4948 KB answer = NO
24 Correct 3 ms 5016 KB answer = YES
25 Correct 4 ms 4948 KB answer = YES
26 Correct 3 ms 4948 KB answer = YES
27 Correct 4 ms 5016 KB answer = YES
28 Correct 3 ms 4948 KB answer = YES
29 Correct 3 ms 4948 KB answer = YES
30 Correct 3 ms 5016 KB answer = NO
31 Correct 3 ms 4948 KB answer = YES
32 Correct 3 ms 5016 KB answer = YES
33 Correct 3 ms 4948 KB answer = YES
34 Correct 3 ms 4948 KB answer = YES
35 Correct 4 ms 5016 KB answer = YES
36 Correct 3 ms 4948 KB answer = YES
37 Correct 3 ms 4948 KB answer = YES
38 Correct 3 ms 4948 KB answer = YES
39 Correct 3 ms 4948 KB answer = YES
40 Correct 3 ms 5076 KB answer = YES
41 Correct 3 ms 5076 KB answer = NO
42 Correct 3 ms 5020 KB answer = YES
43 Correct 4 ms 5080 KB answer = YES
44 Correct 4 ms 5076 KB answer = YES
45 Correct 3 ms 5016 KB answer = YES
46 Correct 3 ms 4948 KB answer = YES
47 Correct 4 ms 5004 KB answer = YES
48 Correct 4 ms 5076 KB answer = YES

Subtask #4
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4948 KB answer = YES
2 Correct 3 ms 4948 KB answer = YES
3 Correct 3 ms 5012 KB answer = YES
4 Correct 3 ms 4948 KB answer = NO
5 Correct 3 ms 4948 KB answer = YES
6 Correct 3 ms 4948 KB answer = YES
7 Correct 3 ms 4948 KB answer = YES
8 Correct 3 ms 4948 KB answer = YES
9 Correct 3 ms 5020 KB answer = NO
10 Correct 2 ms 4948 KB answer = YES
11 Correct 3 ms 4948 KB answer = YES
12 Correct 3 ms 5076 KB answer = NO
13 Correct 4 ms 4948 KB answer = YES
14 Correct 3 ms 4948 KB answer = YES
15 Correct 3 ms 5012 KB answer = YES
16 Correct 3 ms 5012 KB answer = YES
17 Correct 3 ms 5016 KB answer = YES
18 Correct 2 ms 4948 KB answer = YES
19 Correct 3 ms 4948 KB answer = YES
20 Correct 3 ms 4948 KB answer = YES
21 Correct 3 ms 4948 KB answer = YES
22 Correct 3 ms 4948 KB answer = NO
23 Correct 3 ms 4948 KB answer = NO
24 Correct 3 ms 5016 KB answer = YES
25 Correct 4 ms 4948 KB answer = YES
26 Correct 3 ms 4948 KB answer = YES
27 Correct 4 ms 5016 KB answer = YES
28 Correct 3 ms 4948 KB answer = YES
29 Correct 3 ms 4948 KB answer = YES
30 Correct 3 ms 5016 KB answer = NO
31 Correct 3 ms 4948 KB answer = YES
32 Correct 3 ms 5016 KB answer = YES
33 Correct 3 ms 4948 KB answer = YES
34 Correct 3 ms 4948 KB answer = YES
35 Correct 4 ms 5016 KB answer = YES
36 Correct 3 ms 4948 KB answer = YES
37 Correct 3 ms 4948 KB answer = YES
38 Correct 3 ms 4948 KB answer = YES
39 Correct 3 ms 4948 KB answer = YES
40 Correct 3 ms 5076 KB answer = YES
41 Correct 3 ms 5076 KB answer = NO
42 Correct 3 ms 5020 KB answer = YES
43 Correct 4 ms 5080 KB answer = YES
44 Correct 4 ms 5076 KB answer = YES
45 Correct 3 ms 5016 KB answer = YES
46 Correct 3 ms 4948 KB answer = YES
47 Correct 4 ms 5004 KB answer = YES
48 Correct 4 ms 5076 KB answer = YES
49 Correct 9 ms 5844 KB answer = YES
50 Correct 10 ms 6100 KB answer = YES
51 Correct 11 ms 6180 KB answer = YES
52 Correct 7 ms 5972 KB answer = NO
53 Correct 3 ms 5076 KB answer = YES
54 Correct 5 ms 5204 KB answer = YES
55 Correct 8 ms 5460 KB answer = YES
56 Correct 12 ms 5844 KB answer = YES
57 Correct 8 ms 5668 KB answer = YES
58 Correct 8 ms 5716 KB answer = YES
59 Correct 9 ms 5668 KB answer = YES
60 Correct 11 ms 5716 KB answer = YES
61 Correct 6 ms 5324 KB answer = YES
62 Correct 68 ms 12556 KB answer = NO
63 Correct 65 ms 12604 KB answer = YES
64 Correct 61 ms 12492 KB answer = NO
65 Correct 81 ms 12612 KB answer = YES
66 Correct 4 ms 5076 KB answer = YES

Subtask #5
42.0 / 42.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 4948 KB answer = YES
2 Correct 3 ms 4948 KB answer = YES
3 Correct 3 ms 5012 KB answer = YES
4 Correct 3 ms 4948 KB answer = NO
5 Correct 3 ms 4948 KB answer = YES
6 Correct 3 ms 4948 KB answer = YES
7 Correct 3 ms 4948 KB answer = YES
8 Correct 3 ms 4948 KB answer = YES
9 Correct 3 ms 5020 KB answer = NO
10 Correct 2 ms 4948 KB answer = YES
11 Correct 3 ms 4948 KB answer = YES
12 Correct 3 ms 5076 KB answer = NO
13 Correct 4 ms 4948 KB answer = YES
14 Correct 3 ms 4948 KB answer = YES
15 Correct 3 ms 5012 KB answer = YES
16 Correct 3 ms 5012 KB answer = YES
17 Correct 3 ms 5016 KB answer = YES
18 Correct 2 ms 4948 KB answer = YES
19 Correct 3 ms 4948 KB answer = YES
20 Correct 3 ms 4948 KB answer = YES
21 Correct 3 ms 4948 KB answer = YES
22 Correct 3 ms 4948 KB answer = NO
23 Correct 3 ms 4948 KB answer = NO
24 Correct 3 ms 5016 KB answer = YES
25 Correct 4 ms 4948 KB answer = YES
26 Correct 3 ms 4948 KB answer = YES
27 Correct 4 ms 5016 KB answer = YES
28 Correct 3 ms 4948 KB answer = YES
29 Correct 3 ms 4948 KB answer = YES
30 Correct 3 ms 5016 KB answer = NO
31 Correct 3 ms 4948 KB answer = YES
32 Correct 3 ms 5016 KB answer = YES
33 Correct 3 ms 4948 KB answer = YES
34 Correct 3 ms 4948 KB answer = YES
35 Correct 4 ms 5016 KB answer = YES
36 Correct 3 ms 4948 KB answer = YES
37 Correct 3 ms 4948 KB answer = YES
38 Correct 3 ms 4948 KB answer = YES
39 Correct 3 ms 4948 KB answer = YES
40 Correct 3 ms 5076 KB answer = YES
41 Correct 3 ms 5076 KB answer = NO
42 Correct 3 ms 5020 KB answer = YES
43 Correct 4 ms 5080 KB answer = YES
44 Correct 4 ms 5076 KB answer = YES
45 Correct 3 ms 5016 KB answer = YES
46 Correct 3 ms 4948 KB answer = YES
47 Correct 4 ms 5004 KB answer = YES
48 Correct 4 ms 5076 KB answer = YES
49 Correct 9 ms 5844 KB answer = YES
50 Correct 10 ms 6100 KB answer = YES
51 Correct 11 ms 6180 KB answer = YES
52 Correct 7 ms 5972 KB answer = NO
53 Correct 3 ms 5076 KB answer = YES
54 Correct 5 ms 5204 KB answer = YES
55 Correct 8 ms 5460 KB answer = YES
56 Correct 12 ms 5844 KB answer = YES
57 Correct 8 ms 5668 KB answer = YES
58 Correct 8 ms 5716 KB answer = YES
59 Correct 9 ms 5668 KB answer = YES
60 Correct 11 ms 5716 KB answer = YES
61 Correct 6 ms 5324 KB answer = YES
62 Correct 68 ms 12556 KB answer = NO
63 Correct 65 ms 12604 KB answer = YES
64 Correct 61 ms 12492 KB answer = NO
65 Correct 81 ms 12612 KB answer = YES
66 Correct 4 ms 5076 KB answer = YES
67 Correct 74 ms 18840 KB answer = YES
68 Correct 82 ms 18712 KB answer = YES
69 Correct 75 ms 18636 KB answer = YES
70 Correct 96 ms 23124 KB answer = YES
71 Correct 70 ms 18716 KB answer = YES
72 Correct 72 ms 13096 KB answer = YES
73 Correct 84 ms 13096 KB answer = YES
74 Correct 53 ms 13124 KB answer = YES
75 Correct 30 ms 11984 KB answer = NO
76 Correct 12 ms 6040 KB answer = YES
77 Correct 30 ms 6996 KB answer = YES
78 Correct 38 ms 8464 KB answer = YES
79 Correct 64 ms 11936 KB answer = YES
80 Correct 62 ms 13096 KB answer = YES
81 Correct 54 ms 14100 KB answer = NO
82 Correct 81 ms 18288 KB answer = YES
83 Correct 110 ms 18796 KB answer = YES
84 Correct 101 ms 18796 KB answer = YES
85 Correct 78 ms 18776 KB answer = YES
86 Correct 70 ms 18768 KB answer = YES
87 Correct 59 ms 13068 KB answer = NO
88 Correct 116 ms 14960 KB answer = YES
89 Correct 81 ms 11836 KB answer = YES
90 Correct 77 ms 11896 KB answer = YES
91 Correct 73 ms 11928 KB answer = YES
92 Correct 36 ms 9012 KB answer = YES
93 Correct 49 ms 9032 KB answer = YES
94 Correct 82 ms 17136 KB answer = NO
95 Correct 61 ms 11140 KB answer = NO
96 Correct 144 ms 20580 KB answer = YES
97 Correct 41 ms 17128 KB answer = NO