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답안 #525274

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
525274 2022-02-11T08:50:11 Z qwerasdfzxcl Mountains and Valleys (CCO20_day1problem3) C++14
11 / 25
 7000 ms 12856 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, cyc;
bool dfs0(int s, int e, int pa = -1){
    cyc.push_back(s);
    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();
        cyc.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){
        P.clear();
        cyc.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 (auto &x:cyc){
            fill(dist, dist+n, 0);
            dfs(x);
            deep.push_back(*max_element(dist, dist+n));
            ans = min(ans, cur*2-len-calc(x, n));
            //printf("%d: %d\n", x, calc(x, n));
            //for (int i=1;i<=9;i++) printf("%d", on[i]);
            //printf("\n");
        }
 
 
        for (int i=0;i<(int)cyc.size();i++){
            int clen = 0;
            for (int j=i+1;j<(int)cyc.size();j++){
                clen = j-i;
                assert(cur*2 - (max(clen, len-clen) + deep[i] + deep[j]) >= tval);
                ans = min(ans, cur*2 - (max(clen, len-clen) + deep[i] + deep[j]));
            }
        }
 
        ///
 
        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:46:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
Main.cpp:49:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |         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 11980 KB Output is correct
3 Correct 6 ms 11980 KB Output is correct
4 Correct 6 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 7 ms 11980 KB Output is correct
8 Correct 6 ms 11980 KB Output is correct
9 Correct 6 ms 11980 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 7 ms 11980 KB Output is correct
12 Correct 7 ms 11980 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 7 ms 11980 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 11980 KB Output is correct
3 Correct 6 ms 11980 KB Output is correct
4 Correct 6 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 7 ms 11980 KB Output is correct
8 Correct 6 ms 11980 KB Output is correct
9 Correct 6 ms 11980 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 7 ms 11980 KB Output is correct
12 Correct 7 ms 11980 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 7 ms 11980 KB Output is correct
16 Correct 6 ms 11980 KB Output is correct
17 Correct 6 ms 12032 KB Output is correct
18 Correct 7 ms 11980 KB Output is correct
19 Correct 6 ms 12068 KB Output is correct
20 Correct 6 ms 12024 KB Output is correct
21 Correct 7 ms 11980 KB Output is correct
22 Correct 7 ms 12052 KB Output is correct
23 Correct 8 ms 11980 KB Output is correct
24 Correct 7 ms 12072 KB Output is correct
25 Correct 6 ms 11980 KB Output is correct
26 Correct 7 ms 11980 KB Output is correct
27 Correct 9 ms 11980 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 7 ms 11980 KB Output is correct
30 Correct 8 ms 11976 KB Output is correct
31 Correct 6 ms 11980 KB Output is correct
32 Correct 7 ms 11980 KB Output is correct
33 Correct 6 ms 11972 KB Output is correct
34 Correct 6 ms 11980 KB Output is correct
35 Correct 7 ms 11980 KB Output is correct

Subtask #3
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 12856 KB Output is correct
2 Correct 10 ms 12772 KB Output is correct
3 Correct 10 ms 12620 KB Output is correct
4 Correct 10 ms 12620 KB Output is correct
5 Correct 10 ms 12692 KB Output is correct
6 Correct 10 ms 12588 KB Output is correct
7 Correct 10 ms 12748 KB Output is correct
8 Correct 11 ms 12748 KB Output is correct
9 Correct 11 ms 12680 KB Output is correct
10 Correct 10 ms 12620 KB Output is correct
11 Correct 11 ms 12620 KB Output is correct
12 Correct 10 ms 12732 KB Output is correct
13 Correct 10 ms 12636 KB Output is correct
14 Correct 11 ms 12748 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 11980 KB Output is correct
3 Correct 6 ms 11980 KB Output is correct
4 Correct 6 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 7 ms 11980 KB Output is correct
8 Correct 6 ms 11980 KB Output is correct
9 Correct 6 ms 11980 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 7 ms 11980 KB Output is correct
12 Correct 7 ms 11980 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 7 ms 11980 KB Output is correct
16 Correct 6 ms 11980 KB Output is correct
17 Correct 6 ms 12032 KB Output is correct
18 Correct 7 ms 11980 KB Output is correct
19 Correct 6 ms 12068 KB Output is correct
20 Correct 6 ms 12024 KB Output is correct
21 Correct 7 ms 11980 KB Output is correct
22 Correct 7 ms 12052 KB Output is correct
23 Correct 8 ms 11980 KB Output is correct
24 Correct 7 ms 12072 KB Output is correct
25 Correct 6 ms 11980 KB Output is correct
26 Correct 7 ms 11980 KB Output is correct
27 Correct 9 ms 11980 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 7 ms 11980 KB Output is correct
30 Correct 8 ms 11976 KB Output is correct
31 Correct 6 ms 11980 KB Output is correct
32 Correct 7 ms 11980 KB Output is correct
33 Correct 6 ms 11972 KB Output is correct
34 Correct 6 ms 11980 KB Output is correct
35 Correct 7 ms 11980 KB Output is correct
36 Correct 40 ms 12064 KB Output is correct
37 Correct 57 ms 11980 KB Output is correct
38 Correct 43 ms 11980 KB Output is correct
39 Correct 32 ms 11980 KB Output is correct
40 Correct 29 ms 11980 KB Output is correct
41 Correct 8 ms 11980 KB Output is correct
42 Correct 47 ms 11980 KB Output is correct
43 Correct 32 ms 12080 KB Output is correct
44 Correct 36 ms 11980 KB Output is correct
45 Correct 30 ms 11956 KB Output is correct
46 Correct 34 ms 11980 KB Output is correct
47 Correct 32 ms 11980 KB Output is correct
48 Correct 10 ms 11980 KB Output is correct
49 Correct 10 ms 12080 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 11980 KB Output is correct
3 Correct 6 ms 11980 KB Output is correct
4 Correct 6 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 7 ms 11980 KB Output is correct
8 Correct 6 ms 11980 KB Output is correct
9 Correct 6 ms 11980 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 7 ms 11980 KB Output is correct
12 Correct 7 ms 11980 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 7 ms 11980 KB Output is correct
16 Correct 6 ms 11980 KB Output is correct
17 Correct 6 ms 12032 KB Output is correct
18 Correct 7 ms 11980 KB Output is correct
19 Correct 6 ms 12068 KB Output is correct
20 Correct 6 ms 12024 KB Output is correct
21 Correct 7 ms 11980 KB Output is correct
22 Correct 7 ms 12052 KB Output is correct
23 Correct 8 ms 11980 KB Output is correct
24 Correct 7 ms 12072 KB Output is correct
25 Correct 6 ms 11980 KB Output is correct
26 Correct 7 ms 11980 KB Output is correct
27 Correct 9 ms 11980 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 7 ms 11980 KB Output is correct
30 Correct 8 ms 11976 KB Output is correct
31 Correct 6 ms 11980 KB Output is correct
32 Correct 7 ms 11980 KB Output is correct
33 Correct 6 ms 11972 KB Output is correct
34 Correct 6 ms 11980 KB Output is correct
35 Correct 7 ms 11980 KB Output is correct
36 Correct 40 ms 12064 KB Output is correct
37 Correct 57 ms 11980 KB Output is correct
38 Correct 43 ms 11980 KB Output is correct
39 Correct 32 ms 11980 KB Output is correct
40 Correct 29 ms 11980 KB Output is correct
41 Correct 8 ms 11980 KB Output is correct
42 Correct 47 ms 11980 KB Output is correct
43 Correct 32 ms 12080 KB Output is correct
44 Correct 36 ms 11980 KB Output is correct
45 Correct 30 ms 11956 KB Output is correct
46 Correct 34 ms 11980 KB Output is correct
47 Correct 32 ms 11980 KB Output is correct
48 Correct 10 ms 11980 KB Output is correct
49 Correct 10 ms 12080 KB Output is correct
50 Correct 5616 ms 12152 KB Output is correct
51 Execution timed out 7086 ms 12228 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 11980 KB Output is correct
3 Correct 6 ms 11980 KB Output is correct
4 Correct 6 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 7 ms 11980 KB Output is correct
8 Correct 6 ms 11980 KB Output is correct
9 Correct 6 ms 11980 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 7 ms 11980 KB Output is correct
12 Correct 7 ms 11980 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 7 ms 11980 KB Output is correct
16 Correct 6 ms 11980 KB Output is correct
17 Correct 6 ms 12032 KB Output is correct
18 Correct 7 ms 11980 KB Output is correct
19 Correct 6 ms 12068 KB Output is correct
20 Correct 6 ms 12024 KB Output is correct
21 Correct 7 ms 11980 KB Output is correct
22 Correct 7 ms 12052 KB Output is correct
23 Correct 8 ms 11980 KB Output is correct
24 Correct 7 ms 12072 KB Output is correct
25 Correct 6 ms 11980 KB Output is correct
26 Correct 7 ms 11980 KB Output is correct
27 Correct 9 ms 11980 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 7 ms 11980 KB Output is correct
30 Correct 8 ms 11976 KB Output is correct
31 Correct 6 ms 11980 KB Output is correct
32 Correct 7 ms 11980 KB Output is correct
33 Correct 6 ms 11972 KB Output is correct
34 Correct 6 ms 11980 KB Output is correct
35 Correct 7 ms 11980 KB Output is correct
36 Correct 10 ms 12856 KB Output is correct
37 Correct 10 ms 12772 KB Output is correct
38 Correct 10 ms 12620 KB Output is correct
39 Correct 10 ms 12620 KB Output is correct
40 Correct 10 ms 12692 KB Output is correct
41 Correct 10 ms 12588 KB Output is correct
42 Correct 10 ms 12748 KB Output is correct
43 Correct 11 ms 12748 KB Output is correct
44 Correct 11 ms 12680 KB Output is correct
45 Correct 10 ms 12620 KB Output is correct
46 Correct 11 ms 12620 KB Output is correct
47 Correct 10 ms 12732 KB Output is correct
48 Correct 10 ms 12636 KB Output is correct
49 Correct 11 ms 12748 KB Output is correct
50 Correct 40 ms 12064 KB Output is correct
51 Correct 57 ms 11980 KB Output is correct
52 Correct 43 ms 11980 KB Output is correct
53 Correct 32 ms 11980 KB Output is correct
54 Correct 29 ms 11980 KB Output is correct
55 Correct 8 ms 11980 KB Output is correct
56 Correct 47 ms 11980 KB Output is correct
57 Correct 32 ms 12080 KB Output is correct
58 Correct 36 ms 11980 KB Output is correct
59 Correct 30 ms 11956 KB Output is correct
60 Correct 34 ms 11980 KB Output is correct
61 Correct 32 ms 11980 KB Output is correct
62 Correct 10 ms 11980 KB Output is correct
63 Correct 10 ms 12080 KB Output is correct
64 Correct 5616 ms 12152 KB Output is correct
65 Execution timed out 7086 ms 12228 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 11980 KB Output is correct
3 Correct 6 ms 11980 KB Output is correct
4 Correct 6 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 7 ms 11980 KB Output is correct
8 Correct 6 ms 11980 KB Output is correct
9 Correct 6 ms 11980 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 7 ms 11980 KB Output is correct
12 Correct 7 ms 11980 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 7 ms 11980 KB Output is correct
16 Correct 6 ms 11980 KB Output is correct
17 Correct 6 ms 12032 KB Output is correct
18 Correct 7 ms 11980 KB Output is correct
19 Correct 6 ms 12068 KB Output is correct
20 Correct 6 ms 12024 KB Output is correct
21 Correct 7 ms 11980 KB Output is correct
22 Correct 7 ms 12052 KB Output is correct
23 Correct 8 ms 11980 KB Output is correct
24 Correct 7 ms 12072 KB Output is correct
25 Correct 6 ms 11980 KB Output is correct
26 Correct 7 ms 11980 KB Output is correct
27 Correct 9 ms 11980 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 7 ms 11980 KB Output is correct
30 Correct 8 ms 11976 KB Output is correct
31 Correct 6 ms 11980 KB Output is correct
32 Correct 7 ms 11980 KB Output is correct
33 Correct 6 ms 11972 KB Output is correct
34 Correct 6 ms 11980 KB Output is correct
35 Correct 7 ms 11980 KB Output is correct
36 Correct 10 ms 12856 KB Output is correct
37 Correct 10 ms 12772 KB Output is correct
38 Correct 10 ms 12620 KB Output is correct
39 Correct 10 ms 12620 KB Output is correct
40 Correct 10 ms 12692 KB Output is correct
41 Correct 10 ms 12588 KB Output is correct
42 Correct 10 ms 12748 KB Output is correct
43 Correct 11 ms 12748 KB Output is correct
44 Correct 11 ms 12680 KB Output is correct
45 Correct 10 ms 12620 KB Output is correct
46 Correct 11 ms 12620 KB Output is correct
47 Correct 10 ms 12732 KB Output is correct
48 Correct 10 ms 12636 KB Output is correct
49 Correct 11 ms 12748 KB Output is correct
50 Correct 40 ms 12064 KB Output is correct
51 Correct 57 ms 11980 KB Output is correct
52 Correct 43 ms 11980 KB Output is correct
53 Correct 32 ms 11980 KB Output is correct
54 Correct 29 ms 11980 KB Output is correct
55 Correct 8 ms 11980 KB Output is correct
56 Correct 47 ms 11980 KB Output is correct
57 Correct 32 ms 12080 KB Output is correct
58 Correct 36 ms 11980 KB Output is correct
59 Correct 30 ms 11956 KB Output is correct
60 Correct 34 ms 11980 KB Output is correct
61 Correct 32 ms 11980 KB Output is correct
62 Correct 10 ms 11980 KB Output is correct
63 Correct 10 ms 12080 KB Output is correct
64 Correct 5616 ms 12152 KB Output is correct
65 Execution timed out 7086 ms 12228 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 11980 KB Output is correct
3 Correct 6 ms 11980 KB Output is correct
4 Correct 6 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 7 ms 11980 KB Output is correct
8 Correct 6 ms 11980 KB Output is correct
9 Correct 6 ms 11980 KB Output is correct
10 Correct 6 ms 11980 KB Output is correct
11 Correct 7 ms 11980 KB Output is correct
12 Correct 7 ms 11980 KB Output is correct
13 Correct 6 ms 11980 KB Output is correct
14 Correct 6 ms 11980 KB Output is correct
15 Correct 7 ms 11980 KB Output is correct
16 Correct 6 ms 11980 KB Output is correct
17 Correct 6 ms 12032 KB Output is correct
18 Correct 7 ms 11980 KB Output is correct
19 Correct 6 ms 12068 KB Output is correct
20 Correct 6 ms 12024 KB Output is correct
21 Correct 7 ms 11980 KB Output is correct
22 Correct 7 ms 12052 KB Output is correct
23 Correct 8 ms 11980 KB Output is correct
24 Correct 7 ms 12072 KB Output is correct
25 Correct 6 ms 11980 KB Output is correct
26 Correct 7 ms 11980 KB Output is correct
27 Correct 9 ms 11980 KB Output is correct
28 Correct 7 ms 11980 KB Output is correct
29 Correct 7 ms 11980 KB Output is correct
30 Correct 8 ms 11976 KB Output is correct
31 Correct 6 ms 11980 KB Output is correct
32 Correct 7 ms 11980 KB Output is correct
33 Correct 6 ms 11972 KB Output is correct
34 Correct 6 ms 11980 KB Output is correct
35 Correct 7 ms 11980 KB Output is correct
36 Correct 10 ms 12856 KB Output is correct
37 Correct 10 ms 12772 KB Output is correct
38 Correct 10 ms 12620 KB Output is correct
39 Correct 10 ms 12620 KB Output is correct
40 Correct 10 ms 12692 KB Output is correct
41 Correct 10 ms 12588 KB Output is correct
42 Correct 10 ms 12748 KB Output is correct
43 Correct 11 ms 12748 KB Output is correct
44 Correct 11 ms 12680 KB Output is correct
45 Correct 10 ms 12620 KB Output is correct
46 Correct 11 ms 12620 KB Output is correct
47 Correct 10 ms 12732 KB Output is correct
48 Correct 10 ms 12636 KB Output is correct
49 Correct 11 ms 12748 KB Output is correct
50 Correct 40 ms 12064 KB Output is correct
51 Correct 57 ms 11980 KB Output is correct
52 Correct 43 ms 11980 KB Output is correct
53 Correct 32 ms 11980 KB Output is correct
54 Correct 29 ms 11980 KB Output is correct
55 Correct 8 ms 11980 KB Output is correct
56 Correct 47 ms 11980 KB Output is correct
57 Correct 32 ms 12080 KB Output is correct
58 Correct 36 ms 11980 KB Output is correct
59 Correct 30 ms 11956 KB Output is correct
60 Correct 34 ms 11980 KB Output is correct
61 Correct 32 ms 11980 KB Output is correct
62 Correct 10 ms 11980 KB Output is correct
63 Correct 10 ms 12080 KB Output is correct
64 Correct 5616 ms 12152 KB Output is correct
65 Execution timed out 7086 ms 12228 KB Time limit exceeded
66 Halted 0 ms 0 KB -