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답안 #525276

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
525276 2022-02-11T08:52:39 Z qwerasdfzxcl Mountains and Valleys (CCO20_day1problem3) C++14
11 / 25
 7000 ms 12808 KB 
#include <bits/stdc++.h>

typedef long long ll;
using namespace std;
struct Edge{
    int v, w, i;
    Edge(){}
    Edge(int _v, int _w, int _i): v(_v), w(_w), i(_i) {}
};
vector<Edge> adj[500500];
int on[2002000], W[2002000], dist[500500];
vector<Edge> E;

vector<int> P;
bool dfs0(int s, int e, int pa = -1){
    if (s==e) return 1;
    for (auto &v:adj[s]) if (v.v!=pa && on[v.i]){
        P.push_back(v.i);
        if (dfs0(v.v, e, s)) return 1;
        P.pop_back();
    }
    return 0;
}

void dfs(int s, int pa = -1, int w = 0){
    if (pa==-1) dist[s] = 0;
    else dist[s] = dist[pa] + w;
    for (auto &v:adj[s]) if (v.v!=pa && on[v.i]) dfs(v.v, s, v.w);
}

int cur = 0, ans = 1e9, m;
int calc(int s, int n){
    fill(dist, dist+n, 0);
    dfs(s);
    if (*max_element(dist, dist+n)==0) return 0;

    dfs(max_element(dist, dist+n)-dist);

    return *max_element(dist, dist+n);
}

int main(){
    int n;
    scanf("%d %d", &n, &m);
    for (int i=1;i<=m;i++){
        int x, y, z;
        scanf("%d %d %d", &x, &y, &z);
        adj[x].emplace_back(y, z, i);
        adj[y].emplace_back(x, z, i);
        W[i] = z;

        if (z==1) on[i] = 1, cur++;
        else E.emplace_back(x, y, i);
    }

    ans = min(ans, cur*2 - calc(0, n));

    if (n>500) {printf("%d\n", ans); return 0;}

    for (auto &e:E){
        //printf(" %d %d\n", e.v, e.w);
        P.clear();
        assert(dfs0(e.v, e.w));

        on[e.i] = 1, cur += W[e.i];

        int tval = 1e9;
        for (auto &x:P){
            on[x] = 0, cur -= W[x];
            ans = min(ans, cur*2 - calc(0, n));
            tval = min(tval, cur*2 - calc(0, n));
            on[x] = 1, cur += W[x];
        }

        ///cycle
        on[e.i] = 0;
        vector<int> deep;

        int len = W[e.i] + P.size();

        for (auto &x:P) on[x] = 0;
        for (int i=0;i<n;i++){
            ans = min(ans, cur*2-len-calc(i, n));
        }
        ///

        for (auto &x:P) on[x] = 1;

        on[e.i] = 0, cur -= W[e.i];
    }

    printf("%d\n", ans);
    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:44:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
Main.cpp:47:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |         scanf("%d %d %d", &x, &y, &z);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 11980 KB Output is correct
2 Correct 7 ms 12032 KB Output is correct
3 Correct 7 ms 12072 KB Output is correct
4 Correct 7 ms 11980 KB Output is correct
5 Correct 6 ms 11980 KB Output is correct
6 Correct 6 ms 11980 KB Output is correct
7 Correct 6 ms 11980 KB Output is correct
8 Correct 6 ms 12072 KB Output is correct
9 Correct 6 ms 12044 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 6 ms 11980 KB Output is correct
12 Correct 7 ms 12020 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 8 ms 12068 KB Output is correct

Subtask #2
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 11980 KB Output is correct
2 Correct 7 ms 12032 KB Output is correct
3 Correct 7 ms 12072 KB Output is correct
4 Correct 7 ms 11980 KB Output is correct
5 Correct 6 ms 11980 KB Output is correct
6 Correct 6 ms 11980 KB Output is correct
7 Correct 6 ms 11980 KB Output is correct
8 Correct 6 ms 12072 KB Output is correct
9 Correct 6 ms 12044 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 6 ms 11980 KB Output is correct
12 Correct 7 ms 12020 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 8 ms 12068 KB Output is correct
16 Correct 6 ms 12024 KB Output is correct
17 Correct 7 ms 11980 KB Output is correct
18 Correct 7 ms 11980 KB Output is correct
19 Correct 6 ms 11980 KB Output is correct
20 Correct 7 ms 11980 KB Output is correct
21 Correct 7 ms 12068 KB Output is correct
22 Correct 7 ms 12004 KB Output is correct
23 Correct 7 ms 11980 KB Output is correct
24 Correct 7 ms 11980 KB Output is correct
25 Correct 7 ms 11980 KB Output is correct
26 Correct 9 ms 11980 KB Output is correct
27 Correct 7 ms 12036 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 7 ms 11980 KB Output is correct
30 Correct 9 ms 11980 KB Output is correct
31 Correct 7 ms 11980 KB Output is correct
32 Correct 6 ms 12080 KB Output is correct
33 Correct 6 ms 11980 KB Output is correct
34 Correct 6 ms 12068 KB Output is correct
35 Correct 6 ms 11980 KB Output is correct

Subtask #3
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 12808 KB Output is correct
2 Correct 10 ms 12748 KB Output is correct
3 Correct 10 ms 12676 KB Output is correct
4 Correct 10 ms 12684 KB Output is correct
5 Correct 10 ms 12620 KB Output is correct
6 Correct 11 ms 12620 KB Output is correct
7 Correct 10 ms 12748 KB Output is correct
8 Correct 11 ms 12748 KB Output is correct
9 Correct 12 ms 12756 KB Output is correct
10 Correct 11 ms 12692 KB Output is correct
11 Correct 11 ms 12668 KB Output is correct
12 Correct 11 ms 12620 KB Output is correct
13 Correct 11 ms 12736 KB Output is correct
14 Correct 10 ms 12620 KB Output is correct

Subtask #4
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 11980 KB Output is correct
2 Correct 7 ms 12032 KB Output is correct
3 Correct 7 ms 12072 KB Output is correct
4 Correct 7 ms 11980 KB Output is correct
5 Correct 6 ms 11980 KB Output is correct
6 Correct 6 ms 11980 KB Output is correct
7 Correct 6 ms 11980 KB Output is correct
8 Correct 6 ms 12072 KB Output is correct
9 Correct 6 ms 12044 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 6 ms 11980 KB Output is correct
12 Correct 7 ms 12020 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 8 ms 12068 KB Output is correct
16 Correct 6 ms 12024 KB Output is correct
17 Correct 7 ms 11980 KB Output is correct
18 Correct 7 ms 11980 KB Output is correct
19 Correct 6 ms 11980 KB Output is correct
20 Correct 7 ms 11980 KB Output is correct
21 Correct 7 ms 12068 KB Output is correct
22 Correct 7 ms 12004 KB Output is correct
23 Correct 7 ms 11980 KB Output is correct
24 Correct 7 ms 11980 KB Output is correct
25 Correct 7 ms 11980 KB Output is correct
26 Correct 9 ms 11980 KB Output is correct
27 Correct 7 ms 12036 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 7 ms 11980 KB Output is correct
30 Correct 9 ms 11980 KB Output is correct
31 Correct 7 ms 11980 KB Output is correct
32 Correct 6 ms 12080 KB Output is correct
33 Correct 6 ms 11980 KB Output is correct
34 Correct 6 ms 12068 KB Output is correct
35 Correct 6 ms 11980 KB Output is correct
36 Correct 41 ms 12056 KB Output is correct
37 Correct 51 ms 11980 KB Output is correct
38 Correct 48 ms 11980 KB Output is correct
39 Correct 39 ms 12060 KB Output is correct
40 Correct 38 ms 11980 KB Output is correct
41 Correct 29 ms 12032 KB Output is correct
42 Correct 47 ms 12064 KB Output is correct
43 Correct 33 ms 12024 KB Output is correct
44 Correct 40 ms 11980 KB Output is correct
45 Correct 35 ms 12076 KB Output is correct
46 Correct 39 ms 12064 KB Output is correct
47 Correct 39 ms 11980 KB Output is correct
48 Correct 10 ms 12080 KB Output is correct
49 Correct 11 ms 11996 KB Output is correct

Subtask #5
0.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 11980 KB Output is correct
2 Correct 7 ms 12032 KB Output is correct
3 Correct 7 ms 12072 KB Output is correct
4 Correct 7 ms 11980 KB Output is correct
5 Correct 6 ms 11980 KB Output is correct
6 Correct 6 ms 11980 KB Output is correct
7 Correct 6 ms 11980 KB Output is correct
8 Correct 6 ms 12072 KB Output is correct
9 Correct 6 ms 12044 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 6 ms 11980 KB Output is correct
12 Correct 7 ms 12020 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 8 ms 12068 KB Output is correct
16 Correct 6 ms 12024 KB Output is correct
17 Correct 7 ms 11980 KB Output is correct
18 Correct 7 ms 11980 KB Output is correct
19 Correct 6 ms 11980 KB Output is correct
20 Correct 7 ms 11980 KB Output is correct
21 Correct 7 ms 12068 KB Output is correct
22 Correct 7 ms 12004 KB Output is correct
23 Correct 7 ms 11980 KB Output is correct
24 Correct 7 ms 11980 KB Output is correct
25 Correct 7 ms 11980 KB Output is correct
26 Correct 9 ms 11980 KB Output is correct
27 Correct 7 ms 12036 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 7 ms 11980 KB Output is correct
30 Correct 9 ms 11980 KB Output is correct
31 Correct 7 ms 11980 KB Output is correct
32 Correct 6 ms 12080 KB Output is correct
33 Correct 6 ms 11980 KB Output is correct
34 Correct 6 ms 12068 KB Output is correct
35 Correct 6 ms 11980 KB Output is correct
36 Correct 41 ms 12056 KB Output is correct
37 Correct 51 ms 11980 KB Output is correct
38 Correct 48 ms 11980 KB Output is correct
39 Correct 39 ms 12060 KB Output is correct
40 Correct 38 ms 11980 KB Output is correct
41 Correct 29 ms 12032 KB Output is correct
42 Correct 47 ms 12064 KB Output is correct
43 Correct 33 ms 12024 KB Output is correct
44 Correct 40 ms 11980 KB Output is correct
45 Correct 35 ms 12076 KB Output is correct
46 Correct 39 ms 12064 KB Output is correct
47 Correct 39 ms 11980 KB Output is correct
48 Correct 10 ms 12080 KB Output is correct
49 Correct 11 ms 11996 KB Output is correct
50 Correct 6215 ms 12136 KB Output is correct
51 Execution timed out 7096 ms 12108 KB Time limit exceeded
52 Halted 0 ms 0 KB -

Subtask #6
0.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 11980 KB Output is correct
2 Correct 7 ms 12032 KB Output is correct
3 Correct 7 ms 12072 KB Output is correct
4 Correct 7 ms 11980 KB Output is correct
5 Correct 6 ms 11980 KB Output is correct
6 Correct 6 ms 11980 KB Output is correct
7 Correct 6 ms 11980 KB Output is correct
8 Correct 6 ms 12072 KB Output is correct
9 Correct 6 ms 12044 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 6 ms 11980 KB Output is correct
12 Correct 7 ms 12020 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 8 ms 12068 KB Output is correct
16 Correct 6 ms 12024 KB Output is correct
17 Correct 7 ms 11980 KB Output is correct
18 Correct 7 ms 11980 KB Output is correct
19 Correct 6 ms 11980 KB Output is correct
20 Correct 7 ms 11980 KB Output is correct
21 Correct 7 ms 12068 KB Output is correct
22 Correct 7 ms 12004 KB Output is correct
23 Correct 7 ms 11980 KB Output is correct
24 Correct 7 ms 11980 KB Output is correct
25 Correct 7 ms 11980 KB Output is correct
26 Correct 9 ms 11980 KB Output is correct
27 Correct 7 ms 12036 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 7 ms 11980 KB Output is correct
30 Correct 9 ms 11980 KB Output is correct
31 Correct 7 ms 11980 KB Output is correct
32 Correct 6 ms 12080 KB Output is correct
33 Correct 6 ms 11980 KB Output is correct
34 Correct 6 ms 12068 KB Output is correct
35 Correct 6 ms 11980 KB Output is correct
36 Correct 12 ms 12808 KB Output is correct
37 Correct 10 ms 12748 KB Output is correct
38 Correct 10 ms 12676 KB Output is correct
39 Correct 10 ms 12684 KB Output is correct
40 Correct 10 ms 12620 KB Output is correct
41 Correct 11 ms 12620 KB Output is correct
42 Correct 10 ms 12748 KB Output is correct
43 Correct 11 ms 12748 KB Output is correct
44 Correct 12 ms 12756 KB Output is correct
45 Correct 11 ms 12692 KB Output is correct
46 Correct 11 ms 12668 KB Output is correct
47 Correct 11 ms 12620 KB Output is correct
48 Correct 11 ms 12736 KB Output is correct
49 Correct 10 ms 12620 KB Output is correct
50 Correct 41 ms 12056 KB Output is correct
51 Correct 51 ms 11980 KB Output is correct
52 Correct 48 ms 11980 KB Output is correct
53 Correct 39 ms 12060 KB Output is correct
54 Correct 38 ms 11980 KB Output is correct
55 Correct 29 ms 12032 KB Output is correct
56 Correct 47 ms 12064 KB Output is correct
57 Correct 33 ms 12024 KB Output is correct
58 Correct 40 ms 11980 KB Output is correct
59 Correct 35 ms 12076 KB Output is correct
60 Correct 39 ms 12064 KB Output is correct
61 Correct 39 ms 11980 KB Output is correct
62 Correct 10 ms 12080 KB Output is correct
63 Correct 11 ms 11996 KB Output is correct
64 Correct 6215 ms 12136 KB Output is correct
65 Execution timed out 7096 ms 12108 KB Time limit exceeded
66 Halted 0 ms 0 KB -

Subtask #7
0.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 11980 KB Output is correct
2 Correct 7 ms 12032 KB Output is correct
3 Correct 7 ms 12072 KB Output is correct
4 Correct 7 ms 11980 KB Output is correct
5 Correct 6 ms 11980 KB Output is correct
6 Correct 6 ms 11980 KB Output is correct
7 Correct 6 ms 11980 KB Output is correct
8 Correct 6 ms 12072 KB Output is correct
9 Correct 6 ms 12044 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 6 ms 11980 KB Output is correct
12 Correct 7 ms 12020 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 8 ms 12068 KB Output is correct
16 Correct 6 ms 12024 KB Output is correct
17 Correct 7 ms 11980 KB Output is correct
18 Correct 7 ms 11980 KB Output is correct
19 Correct 6 ms 11980 KB Output is correct
20 Correct 7 ms 11980 KB Output is correct
21 Correct 7 ms 12068 KB Output is correct
22 Correct 7 ms 12004 KB Output is correct
23 Correct 7 ms 11980 KB Output is correct
24 Correct 7 ms 11980 KB Output is correct
25 Correct 7 ms 11980 KB Output is correct
26 Correct 9 ms 11980 KB Output is correct
27 Correct 7 ms 12036 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 7 ms 11980 KB Output is correct
30 Correct 9 ms 11980 KB Output is correct
31 Correct 7 ms 11980 KB Output is correct
32 Correct 6 ms 12080 KB Output is correct
33 Correct 6 ms 11980 KB Output is correct
34 Correct 6 ms 12068 KB Output is correct
35 Correct 6 ms 11980 KB Output is correct
36 Correct 12 ms 12808 KB Output is correct
37 Correct 10 ms 12748 KB Output is correct
38 Correct 10 ms 12676 KB Output is correct
39 Correct 10 ms 12684 KB Output is correct
40 Correct 10 ms 12620 KB Output is correct
41 Correct 11 ms 12620 KB Output is correct
42 Correct 10 ms 12748 KB Output is correct
43 Correct 11 ms 12748 KB Output is correct
44 Correct 12 ms 12756 KB Output is correct
45 Correct 11 ms 12692 KB Output is correct
46 Correct 11 ms 12668 KB Output is correct
47 Correct 11 ms 12620 KB Output is correct
48 Correct 11 ms 12736 KB Output is correct
49 Correct 10 ms 12620 KB Output is correct
50 Correct 41 ms 12056 KB Output is correct
51 Correct 51 ms 11980 KB Output is correct
52 Correct 48 ms 11980 KB Output is correct
53 Correct 39 ms 12060 KB Output is correct
54 Correct 38 ms 11980 KB Output is correct
55 Correct 29 ms 12032 KB Output is correct
56 Correct 47 ms 12064 KB Output is correct
57 Correct 33 ms 12024 KB Output is correct
58 Correct 40 ms 11980 KB Output is correct
59 Correct 35 ms 12076 KB Output is correct
60 Correct 39 ms 12064 KB Output is correct
61 Correct 39 ms 11980 KB Output is correct
62 Correct 10 ms 12080 KB Output is correct
63 Correct 11 ms 11996 KB Output is correct
64 Correct 6215 ms 12136 KB Output is correct
65 Execution timed out 7096 ms 12108 KB Time limit exceeded
66 Halted 0 ms 0 KB -

Subtask #8
0.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 11980 KB Output is correct
2 Correct 7 ms 12032 KB Output is correct
3 Correct 7 ms 12072 KB Output is correct
4 Correct 7 ms 11980 KB Output is correct
5 Correct 6 ms 11980 KB Output is correct
6 Correct 6 ms 11980 KB Output is correct
7 Correct 6 ms 11980 KB Output is correct
8 Correct 6 ms 12072 KB Output is correct
9 Correct 6 ms 12044 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 6 ms 11980 KB Output is correct
12 Correct 7 ms 12020 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 8 ms 12068 KB Output is correct
16 Correct 6 ms 12024 KB Output is correct
17 Correct 7 ms 11980 KB Output is correct
18 Correct 7 ms 11980 KB Output is correct
19 Correct 6 ms 11980 KB Output is correct
20 Correct 7 ms 11980 KB Output is correct
21 Correct 7 ms 12068 KB Output is correct
22 Correct 7 ms 12004 KB Output is correct
23 Correct 7 ms 11980 KB Output is correct
24 Correct 7 ms 11980 KB Output is correct
25 Correct 7 ms 11980 KB Output is correct
26 Correct 9 ms 11980 KB Output is correct
27 Correct 7 ms 12036 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 7 ms 11980 KB Output is correct
30 Correct 9 ms 11980 KB Output is correct
31 Correct 7 ms 11980 KB Output is correct
32 Correct 6 ms 12080 KB Output is correct
33 Correct 6 ms 11980 KB Output is correct
34 Correct 6 ms 12068 KB Output is correct
35 Correct 6 ms 11980 KB Output is correct
36 Correct 12 ms 12808 KB Output is correct
37 Correct 10 ms 12748 KB Output is correct
38 Correct 10 ms 12676 KB Output is correct
39 Correct 10 ms 12684 KB Output is correct
40 Correct 10 ms 12620 KB Output is correct
41 Correct 11 ms 12620 KB Output is correct
42 Correct 10 ms 12748 KB Output is correct
43 Correct 11 ms 12748 KB Output is correct
44 Correct 12 ms 12756 KB Output is correct
45 Correct 11 ms 12692 KB Output is correct
46 Correct 11 ms 12668 KB Output is correct
47 Correct 11 ms 12620 KB Output is correct
48 Correct 11 ms 12736 KB Output is correct
49 Correct 10 ms 12620 KB Output is correct
50 Correct 41 ms 12056 KB Output is correct
51 Correct 51 ms 11980 KB Output is correct
52 Correct 48 ms 11980 KB Output is correct
53 Correct 39 ms 12060 KB Output is correct
54 Correct 38 ms 11980 KB Output is correct
55 Correct 29 ms 12032 KB Output is correct
56 Correct 47 ms 12064 KB Output is correct
57 Correct 33 ms 12024 KB Output is correct
58 Correct 40 ms 11980 KB Output is correct
59 Correct 35 ms 12076 KB Output is correct
60 Correct 39 ms 12064 KB Output is correct
61 Correct 39 ms 11980 KB Output is correct
62 Correct 10 ms 12080 KB Output is correct
63 Correct 11 ms 11996 KB Output is correct
64 Correct 6215 ms 12136 KB Output is correct
65 Execution timed out 7096 ms 12108 KB Time limit exceeded
66 Halted 0 ms 0 KB -