oj.uz

Submission #522456

# Submission time Handle Problem Language Result Execution time Memory
522456 2022-02-05T04:17:41 Z krit3379 Connecting Supertrees (IOI20_supertrees) C++14
100 / 100
 204 ms 26440 KB 
#include<bits/stdc++.h>
using namespace std;
#include "supertrees.h"
#define N 1005

int p[N],pp[N];
vector<int> v;
vector<vector<int>> a,b;
bitset<N> vis,ch;

int fp(int v){return (v==p[v])?v:p[v]=fp(p[v]);}
int fpp(int v){return (v==pp[v])?v:pp[v]=fpp(pp[v]);}

bool sol(int n){
    int i,j,cy=0,head,num;
    vector<int> gr[N],u;
    ch=0;
    iota(pp,pp+n,0);
    for(i=0;i<n;i++){
        for(j=0;j<n;j++){
            num=a[v[i]][v[j]];
            if(num==1){
                if(fpp(i)!=fpp(j))pp[fpp(i)]=fpp(j);
            }
            else if(!cy){
                cy=num;
            }
            else if(cy!=num)return false;

        }
    }
    for(i=0;i<n;i++)gr[fpp(i)].push_back(v[i]);
    if(!cy){
        for(i=1;i<n;i++)b[v[i]][v[i-1]]=b[v[i-1]][v[i]]=1;
        return true;
    }
    else{
        for(i=0;i<n;i++){
            if(ch[fpp(i)])continue;
            head=fpp(i);
            u.push_back(v[head]);
            ch[head]=true;
            for(auto x:gr[head]){
                for(j=0;j<n;j++){
                    if(fpp(j)==head){
                        if(a[x][v[j]]!=1)return false;
                    }
                    else{
                        if(a[x][v[j]]!=cy)return false;
                    }
                }
            }
        }
        for(i=0;i<n;i++)
            for(j=1;j<gr[i].size();j++)b[gr[i][j]][gr[i][j-1]]=b[gr[i][j-1]][gr[i][j]]=1;
        if(cy==2){
            if(u.size()<3)return false;
            for(i=1;i<u.size();i++)b[u[i]][u[i-1]]=b[u[i-1]][u[i]]=1;
            b[u[0]][u.back()]=b[u.back()][u[0]]=1;
            return true;
        }
        else{
            if(u.size()<4)return false;
            for(i=1;i<u.size();i++)b[u[i]][u[i-1]]=b[u[i-1]][u[i]]=1;
            b[u[0]][u.back()]=b[u.back()][u[0]]=1;
            b[u[0]][u[2]]=b[u[2]][u[0]]=1;
            return true;
        }
    }
}

int construct(vector<vector<int>> input) {
    a=input;
	int n=a.size(),i,j,m;
	bool flag;
	iota(p,p+n,0);
	for(i=0;i<n;i++){
        b.push_back({});
        b[i].resize(n);
        for(j=0;j<n;j++){
          	if(a[i][j]==3)return 0;
            if(a[i][j]){
                if(fp(i)==fp(j))continue;
                p[fp(i)]=fp(j);
            }
            else if(fp(i)==fp(j))return 0;
        }
	}
	for(i=0;i<n;i++){
        if(!vis[fp(i)]){
            vis[fp(i)]=true;
            for(j=0;j<n;j++)if(fp(i)==fp(j))v.push_back(j);
            m=v.size();
            flag=sol(m);
            v.clear();
            if(!flag)return 0;
        }
	}
	build(b);
	return 1;
}

Compilation message

supertrees.cpp: In function 'bool sol(int)':
supertrees.cpp:55:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |             for(j=1;j<gr[i].size();j++)b[gr[i][j]][gr[i][j-1]]=b[gr[i][j-1]][gr[i][j]]=1;
      |                     ~^~~~~~~~~~~~~
supertrees.cpp:58:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |             for(i=1;i<u.size();i++)b[u[i]][u[i-1]]=b[u[i-1]][u[i]]=1;
      |                     ~^~~~~~~~~
supertrees.cpp:64:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |             for(i=1;i<u.size();i++)b[u[i]][u[i-1]]=b[u[i-1]][u[i]]=1;
      |                     ~^~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 8 ms 1352 KB Output is correct
7 Correct 163 ms 26004 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 8 ms 1352 KB Output is correct
7 Correct 163 ms 26004 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 7 ms 1356 KB Output is correct
13 Correct 167 ms 25924 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 4 ms 716 KB Output is correct
17 Correct 72 ms 12036 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 43 ms 6664 KB Output is correct
21 Correct 173 ms 25980 KB Output is correct
22 Correct 173 ms 25980 KB Output is correct
23 Correct 182 ms 25924 KB Output is correct
24 Correct 173 ms 25984 KB Output is correct
25 Correct 82 ms 15304 KB Output is correct
26 Correct 67 ms 13188 KB Output is correct
27 Correct 175 ms 25988 KB Output is correct
28 Correct 174 ms 25980 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 7 ms 1356 KB Output is correct
9 Correct 170 ms 25996 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 7 ms 1356 KB Output is correct
13 Correct 165 ms 25996 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 3 ms 716 KB Output is correct
17 Correct 80 ms 12096 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 43 ms 6708 KB Output is correct
22 Correct 204 ms 26140 KB Output is correct
23 Correct 172 ms 26148 KB Output is correct
24 Correct 176 ms 26164 KB Output is correct
25 Correct 74 ms 16164 KB Output is correct
26 Correct 68 ms 12440 KB Output is correct
27 Correct 170 ms 26056 KB Output is correct
28 Correct 189 ms 26136 KB Output is correct
29 Correct 77 ms 16128 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 44 ms 6724 KB Output is correct
5 Correct 190 ms 25992 KB Output is correct
6 Correct 176 ms 25996 KB Output is correct
7 Correct 201 ms 25924 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 45 ms 6760 KB Output is correct
10 Correct 183 ms 26272 KB Output is correct
11 Correct 185 ms 26200 KB Output is correct
12 Correct 180 ms 26376 KB Output is correct
13 Correct 1 ms 248 KB Output is correct
14 Correct 1 ms 296 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 44 ms 6864 KB Output is correct
17 Correct 169 ms 26168 KB Output is correct
18 Correct 171 ms 26168 KB Output is correct
19 Correct 179 ms 26440 KB Output is correct
20 Correct 171 ms 26192 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 8 ms 1352 KB Output is correct
7 Correct 163 ms 26004 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 7 ms 1356 KB Output is correct
13 Correct 167 ms 25924 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 4 ms 716 KB Output is correct
17 Correct 72 ms 12036 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 43 ms 6664 KB Output is correct
21 Correct 173 ms 25980 KB Output is correct
22 Correct 173 ms 25980 KB Output is correct
23 Correct 182 ms 25924 KB Output is correct
24 Correct 173 ms 25984 KB Output is correct
25 Correct 82 ms 15304 KB Output is correct
26 Correct 67 ms 13188 KB Output is correct
27 Correct 175 ms 25988 KB Output is correct
28 Correct 174 ms 25980 KB Output is correct
29 Correct 0 ms 204 KB Output is correct
30 Correct 0 ms 204 KB Output is correct
31 Correct 0 ms 204 KB Output is correct
32 Correct 0 ms 204 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 0 ms 204 KB Output is correct
36 Correct 7 ms 1356 KB Output is correct
37 Correct 170 ms 25996 KB Output is correct
38 Correct 1 ms 204 KB Output is correct
39 Correct 0 ms 204 KB Output is correct
40 Correct 7 ms 1356 KB Output is correct
41 Correct 165 ms 25996 KB Output is correct
42 Correct 0 ms 204 KB Output is correct
43 Correct 0 ms 204 KB Output is correct
44 Correct 3 ms 716 KB Output is correct
45 Correct 80 ms 12096 KB Output is correct
46 Correct 1 ms 204 KB Output is correct
47 Correct 0 ms 204 KB Output is correct
48 Correct 0 ms 204 KB Output is correct
49 Correct 43 ms 6708 KB Output is correct
50 Correct 204 ms 26140 KB Output is correct
51 Correct 172 ms 26148 KB Output is correct
52 Correct 176 ms 26164 KB Output is correct
53 Correct 74 ms 16164 KB Output is correct
54 Correct 68 ms 12440 KB Output is correct
55 Correct 170 ms 26056 KB Output is correct
56 Correct 189 ms 26136 KB Output is correct
57 Correct 77 ms 16128 KB Output is correct
58 Correct 1 ms 204 KB Output is correct
59 Correct 1 ms 204 KB Output is correct
60 Correct 4 ms 792 KB Output is correct
61 Correct 71 ms 12284 KB Output is correct
62 Correct 1 ms 204 KB Output is correct
63 Correct 0 ms 204 KB Output is correct
64 Correct 1 ms 204 KB Output is correct
65 Correct 46 ms 6852 KB Output is correct
66 Correct 73 ms 12448 KB Output is correct
67 Correct 69 ms 12444 KB Output is correct
68 Correct 78 ms 14084 KB Output is correct
69 Correct 75 ms 16284 KB Output is correct

Subtask #6
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 8 ms 1352 KB Output is correct
7 Correct 163 ms 26004 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 7 ms 1356 KB Output is correct
13 Correct 167 ms 25924 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 4 ms 716 KB Output is correct
17 Correct 72 ms 12036 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 43 ms 6664 KB Output is correct
21 Correct 173 ms 25980 KB Output is correct
22 Correct 173 ms 25980 KB Output is correct
23 Correct 182 ms 25924 KB Output is correct
24 Correct 173 ms 25984 KB Output is correct
25 Correct 82 ms 15304 KB Output is correct
26 Correct 67 ms 13188 KB Output is correct
27 Correct 175 ms 25988 KB Output is correct
28 Correct 174 ms 25980 KB Output is correct
29 Correct 0 ms 204 KB Output is correct
30 Correct 0 ms 204 KB Output is correct
31 Correct 0 ms 204 KB Output is correct
32 Correct 0 ms 204 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 0 ms 204 KB Output is correct
36 Correct 7 ms 1356 KB Output is correct
37 Correct 170 ms 25996 KB Output is correct
38 Correct 1 ms 204 KB Output is correct
39 Correct 0 ms 204 KB Output is correct
40 Correct 7 ms 1356 KB Output is correct
41 Correct 165 ms 25996 KB Output is correct
42 Correct 0 ms 204 KB Output is correct
43 Correct 0 ms 204 KB Output is correct
44 Correct 3 ms 716 KB Output is correct
45 Correct 80 ms 12096 KB Output is correct
46 Correct 1 ms 204 KB Output is correct
47 Correct 0 ms 204 KB Output is correct
48 Correct 0 ms 204 KB Output is correct
49 Correct 43 ms 6708 KB Output is correct
50 Correct 204 ms 26140 KB Output is correct
51 Correct 172 ms 26148 KB Output is correct
52 Correct 176 ms 26164 KB Output is correct
53 Correct 74 ms 16164 KB Output is correct
54 Correct 68 ms 12440 KB Output is correct
55 Correct 170 ms 26056 KB Output is correct
56 Correct 189 ms 26136 KB Output is correct
57 Correct 77 ms 16128 KB Output is correct
58 Correct 0 ms 204 KB Output is correct
59 Correct 0 ms 204 KB Output is correct
60 Correct 1 ms 204 KB Output is correct
61 Correct 44 ms 6724 KB Output is correct
62 Correct 190 ms 25992 KB Output is correct
63 Correct 176 ms 25996 KB Output is correct
64 Correct 201 ms 25924 KB Output is correct
65 Correct 1 ms 204 KB Output is correct
66 Correct 45 ms 6760 KB Output is correct
67 Correct 183 ms 26272 KB Output is correct
68 Correct 185 ms 26200 KB Output is correct
69 Correct 180 ms 26376 KB Output is correct
70 Correct 1 ms 248 KB Output is correct
71 Correct 1 ms 296 KB Output is correct
72 Correct 1 ms 204 KB Output is correct
73 Correct 44 ms 6864 KB Output is correct
74 Correct 169 ms 26168 KB Output is correct
75 Correct 171 ms 26168 KB Output is correct
76 Correct 179 ms 26440 KB Output is correct
77 Correct 171 ms 26192 KB Output is correct
78 Correct 1 ms 204 KB Output is correct
79 Correct 1 ms 204 KB Output is correct
80 Correct 4 ms 792 KB Output is correct
81 Correct 71 ms 12284 KB Output is correct
82 Correct 1 ms 204 KB Output is correct
83 Correct 0 ms 204 KB Output is correct
84 Correct 1 ms 204 KB Output is correct
85 Correct 46 ms 6852 KB Output is correct
86 Correct 73 ms 12448 KB Output is correct
87 Correct 69 ms 12444 KB Output is correct
88 Correct 78 ms 14084 KB Output is correct
89 Correct 75 ms 16284 KB Output is correct
90 Correct 0 ms 300 KB Output is correct
91 Correct 0 ms 204 KB Output is correct
92 Correct 4 ms 792 KB Output is correct
93 Correct 71 ms 12304 KB Output is correct
94 Correct 1 ms 204 KB Output is correct
95 Correct 0 ms 292 KB Output is correct
96 Correct 0 ms 204 KB Output is correct
97 Correct 17 ms 3496 KB Output is correct
98 Correct 75 ms 12556 KB Output is correct
99 Correct 72 ms 12928 KB Output is correct
100 Correct 72 ms 12684 KB Output is correct
101 Correct 70 ms 13708 KB Output is correct
102 Correct 64 ms 12332 KB Output is correct
103 Correct 66 ms 14064 KB Output is correct
104 Correct 62 ms 14064 KB Output is correct
105 Correct 73 ms 13992 KB Output is correct