oj.uz

Submission #640043

# Submission time Handle Problem Language Result Execution time Memory
640043 2022-09-13T11:47:27 Z greeft Love Polygon (BOI18_polygon) C++14
100 / 100
 557 ms 26844 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll uint_fast64_t
const ll base = 1e6;
const int MAX = 100001;
int n,edges[MAX],value;
string s,t;
map <string,int> m;
map <ll,bool> if_match;
bool if_deleted[MAX],if_paired[MAX];
string graph[MAX];
queue <int> q;
int dfs(int a,int c,int length) 
{
    if_deleted[a] = true;

        if (c == m[graph[a]])return length + 1;
        if(if_deleted[m[graph[a]]]||if_paired[m[graph[a]]])return length + 1;
        return dfs(m[graph[a]], c, length + 1);
    return length + 1;
}
int main()
{
        ios_base::sync_with_stdio(false);
        cin.tie(NULL);
        cin>>n;
        if(n%2)
        {
            printf("-1");
            return 0;
        }
        for(int i = 1;i<=n;++i)
        {
            cin>>s>>t;
            m[s] = i;
            graph[m[s]] = t;
        }
        for(int i = 1;i<=n;++i) {
                if(if_match[ll(m[graph[i]]) * base + ll(i)])
                {
                    if_deleted[i] = true;
                    if_deleted[m[graph[i]]] = true;
                    continue;
                }
                if_match[ll(i) * base + ll(m[graph[i]])] = true;
        }

    for(int i = 1;i<=n;++i)
    {
        if(if_deleted[i])continue;
            if(!if_deleted[m[graph[i]]])edges[m[graph[i]]]++;
    }
    for(int i = 1;i<=n;++i)if(!edges[i]&&!if_deleted[i])q.push(i);
    while(!q.empty())
    {
        int p = q.front();
        q.pop();
        if(if_paired[p]||if_deleted[p])continue;
        if(!if_paired[m[graph[p]]])
        {
            if_paired[p] = true;
            if_paired[m[graph[p]]] = true;
            ++value;
            --edges[m[graph[m[graph[p]]]]];
           if(!edges[m[graph[m[graph[p]]]]]) q.push(m[graph[m[graph[p]]]]);
        }

    }
    //cout<<value<<endl;
    for(int i = 1 ;i<=n;++i)
    {
        if(!if_deleted[i]&&!if_paired[i])
        {
            int h = dfs(i,i,0);
            // cout<<h<<endl;
            if(h%2)value+= (h>>1) +1;
            else value += (h>>1);
        }
    }
    cout<<value<<endl;
}

Subtask #1
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 2 ms 3412 KB Output is correct
5 Correct 2 ms 3412 KB Output is correct
6 Correct 2 ms 3412 KB Output is correct
7 Correct 2 ms 3412 KB Output is correct
8 Correct 2 ms 3412 KB Output is correct
9 Correct 2 ms 3412 KB Output is correct
10 Correct 2 ms 3412 KB Output is correct
11 Correct 2 ms 3456 KB Output is correct
12 Correct 2 ms 3412 KB Output is correct
13 Correct 2 ms 3464 KB Output is correct
14 Correct 2 ms 3412 KB Output is correct
15 Correct 2 ms 3456 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3412 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 2 ms 3456 KB Output is correct
4 Correct 432 ms 26380 KB Output is correct
5 Correct 557 ms 26128 KB Output is correct
6 Correct 449 ms 26428 KB Output is correct
7 Correct 2 ms 3412 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 540 ms 26544 KB Output is correct
2 Correct 420 ms 26584 KB Output is correct
3 Correct 333 ms 20152 KB Output is correct
4 Correct 3 ms 3412 KB Output is correct
5 Correct 470 ms 26344 KB Output is correct
6 Correct 441 ms 26640 KB Output is correct
7 Correct 465 ms 26584 KB Output is correct
8 Correct 399 ms 23480 KB Output is correct
9 Correct 540 ms 26844 KB Output is correct
10 Correct 259 ms 26420 KB Output is correct
11 Correct 2 ms 3412 KB Output is correct
12 Correct 2 ms 3412 KB Output is correct
13 Correct 2 ms 3412 KB Output is correct
14 Correct 3 ms 3460 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 2 ms 3412 KB Output is correct
5 Correct 2 ms 3412 KB Output is correct
6 Correct 2 ms 3412 KB Output is correct
7 Correct 2 ms 3412 KB Output is correct
8 Correct 2 ms 3412 KB Output is correct
9 Correct 2 ms 3412 KB Output is correct
10 Correct 2 ms 3412 KB Output is correct
11 Correct 2 ms 3456 KB Output is correct
12 Correct 2 ms 3412 KB Output is correct
13 Correct 2 ms 3464 KB Output is correct
14 Correct 2 ms 3412 KB Output is correct
15 Correct 2 ms 3456 KB Output is correct
16 Correct 3 ms 3412 KB Output is correct
17 Correct 2 ms 3412 KB Output is correct
18 Correct 2 ms 3456 KB Output is correct
19 Correct 432 ms 26380 KB Output is correct
20 Correct 557 ms 26128 KB Output is correct
21 Correct 449 ms 26428 KB Output is correct
22 Correct 2 ms 3412 KB Output is correct
23 Correct 540 ms 26544 KB Output is correct
24 Correct 420 ms 26584 KB Output is correct
25 Correct 333 ms 20152 KB Output is correct
26 Correct 3 ms 3412 KB Output is correct
27 Correct 470 ms 26344 KB Output is correct
28 Correct 441 ms 26640 KB Output is correct
29 Correct 465 ms 26584 KB Output is correct
30 Correct 399 ms 23480 KB Output is correct
31 Correct 540 ms 26844 KB Output is correct
32 Correct 259 ms 26420 KB Output is correct
33 Correct 2 ms 3412 KB Output is correct
34 Correct 2 ms 3412 KB Output is correct
35 Correct 2 ms 3412 KB Output is correct
36 Correct 3 ms 3460 KB Output is correct
37 Correct 506 ms 26508 KB Output is correct
38 Correct 409 ms 26608 KB Output is correct
39 Correct 408 ms 26632 KB Output is correct
40 Correct 454 ms 26648 KB Output is correct
41 Correct 487 ms 26720 KB Output is correct
42 Correct 448 ms 26604 KB Output is correct
43 Correct 502 ms 26624 KB Output is correct
44 Correct 420 ms 26588 KB Output is correct
45 Correct 473 ms 26628 KB Output is correct
46 Correct 423 ms 26568 KB Output is correct
47 Correct 442 ms 26760 KB Output is correct
48 Correct 420 ms 26612 KB Output is correct
49 Correct 548 ms 26500 KB Output is correct
50 Correct 271 ms 20300 KB Output is correct
51 Correct 2 ms 3468 KB Output is correct
52 Correct 460 ms 26432 KB Output is correct
53 Correct 411 ms 26728 KB Output is correct
54 Correct 411 ms 26628 KB Output is correct
55 Correct 343 ms 23548 KB Output is correct
56 Correct 418 ms 26792 KB Output is correct
57 Correct 245 ms 26572 KB Output is correct
58 Correct 2 ms 3456 KB Output is correct
59 Correct 2 ms 3460 KB Output is correct
60 Correct 2 ms 3460 KB Output is correct
61 Correct 2 ms 3412 KB Output is correct
62 Correct 2 ms 3412 KB Output is correct
63 Correct 2 ms 3456 KB Output is correct
64 Correct 2 ms 3464 KB Output is correct
65 Correct 402 ms 26432 KB Output is correct
66 Correct 424 ms 26016 KB Output is correct
67 Correct 413 ms 26336 KB Output is correct
68 Correct 2 ms 3412 KB Output is correct
69 Correct 2 ms 3412 KB Output is correct
70 Correct 2 ms 3412 KB Output is correct
71 Correct 2 ms 3412 KB Output is correct
72 Correct 2 ms 3412 KB Output is correct
73 Correct 2 ms 3412 KB Output is correct
74 Correct 2 ms 3412 KB Output is correct
75 Correct 2 ms 3412 KB Output is correct
76 Correct 2 ms 3456 KB Output is correct
77 Correct 2 ms 3384 KB Output is correct
78 Correct 2 ms 3412 KB Output is correct
79 Correct 2 ms 3368 KB Output is correct
80 Correct 2 ms 3412 KB Output is correct
81 Correct 2 ms 3412 KB Output is correct
82 Correct 2 ms 3412 KB Output is correct
83 Correct 2 ms 3412 KB Output is correct