oj.uz

Submission #842042

# Submission time Handle Problem Language Result Execution time Memory
842042 2023-09-02T10:30:46 Z 8pete8 Connecting Supertrees (IOI20_supertrees) C++17
100 / 100
 180 ms 22356 KB 
#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<unordered_map>
#include <queue>
#include<cstring>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include<bitset>
#include "supertrees.h"
using namespace std;
#define ll long long
#define f first
#define endl "\n"
#define s second
#define pii pair<int,int>
#define ppii pair<int,pii>
#define pb push_back
#define all(x) x.begin(),x.end()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
using namespace std;
const int mxn=2*1e3,mod=998244353,lg=42,root=80,inf=1e9;
void setIO(string name) {
	ios_base::sync_with_stdio(0); cin.tie(0);
	freopen((name+".in").c_str(),"r",stdin);
	freopen((name+".out").c_str(),"w",stdout);
}
int last[mxn+10],first[mxn+10];
struct dsu{
    int pa[mxn+10],sz[mxn+10];
    void init(){for(int i=0;i<=mxn;i++)pa[i]=i,sz[i]=1;}
    int find(int u){
        if(pa[u]==u)return u;
        return pa[u]=find(pa[u]);
    }
    void merg(int u,int v){
        int a=find(u),b=find(v);
        if(a==b)return;
        if(sz[a]>=sz[b]){
            pa[b]=a;
            sz[a]+=sz[b];
            return;
        }
        pa[a]=b;
        sz[b]+=sz[a];
    }
};
/*
void build(vector<vector<int>>v){
    for(auto i:v){
        for(auto j:i)cout<<j<<" ";
        cout<<'\n';
    }
}
*/
vector<int>v[mxn+10];
int construct(vector<vector<int>>p){
    int n=p.size();
    dsu one,two;
    vector<vector<int>>ans(n,vector<int>(n));
    one.init();
    two.init();
    for(int i=0;i<n;i++){
        for(int j=0;j<i;j++){
            if(p[i][j]==3)return 0;//not possible
            if(p[i][j]==1)one.merg(i,j);
            if(p[i][j]!=p[j][i])return 0;
        }
    }
    for(int i=0;i<n;i++)v[one.pa[i]].pb(i),one.pa[i]=one.find(i);
    //case one
    for(int i=0;i<n;i++)if(one.pa[i]!=i)ans[i][one.pa[i]]=1,ans[one.pa[i]][i]=1;
    for(int i=0;i<n;i++){
        for(int j=0;j<i;j++){
            if(p[i][j]==2)two.merg(one.pa[i],one.pa[j]);//grouping
        }
    }
    for(int i=0;i<n;i++)two.pa[i]=two.find(i);
    fill(last,last+mxn,-1);
    fill(first,first+mxn,-1);
    //cyclic connection in group
    for(int i=0;i<n;i++){
        if(v[i].size())continue;
        vector<int>check(n,-1);
        for(int j=0;j<n;j++)check[j]=p[i][j];
        for(int j=1;j<v[i].size();j++){
            for(int k=0;k<n;k++)if(check[j]!=p[v[i][j]][k])return 0;
        }
    }
    for(int i=0;i<n;i++){
        if(one.pa[i]!=i)continue;
        if(last[two.pa[i]]==-1)last[two.pa[i]]=i,first[two.pa[i]]=i;
        else{
            ans[last[two.pa[i]]][i]=1;
            ans[i][last[two.pa[i]]]=1;
            last[two.pa[i]]=i;
        }
    }
    //finish the last connect
    for(int i=0;i<n;i++){
        if(last[i]==-1)continue;
        if(first[i]==last[i])continue;
        if(ans[first[i]][last[i]]){//already connected
            if(v[first[i]].size()>1||v[last[i]].size()>1){
                //connect to second node
                if(v[last[i]].size()>1)swap(first[i],last[i]);
                ans[first[i]][v[last[i]][1]]=1;
                ans[v[last[i]][1]][first[i]]=1;
            }
            else return 0;
            continue;
        }
        ans[first[i]][last[i]]=1;
        ans[last[i]][first[i]]=1;
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            if(p[i][j]!=0)continue;
            if((two.pa[i]==two.pa[j])||(one.pa[i]==one.pa[j]))return 0;
        }
    }
    build(ans);
    return 1;
}
/*
int32_t main(){
    fastio
    int n;cin>>n;
    vector<vector<int>>in(n,vector<int>(n));
    for(int i=0;i<n;i++)for(int j=0;j<n;j++)cin>>in[i][j];
    construct(in);
    return 0;
}*/

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:92:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   92 |         for(int j=1;j<v[i].size();j++){
      |                     ~^~~~~~~~~~~~
supertrees.cpp: In function 'void setIO(std::string)':
supertrees.cpp:31:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
supertrees.cpp:32:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 8 ms 1368 KB Output is correct
7 Correct 155 ms 22280 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 8 ms 1368 KB Output is correct
7 Correct 155 ms 22280 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 7 ms 1416 KB Output is correct
13 Correct 170 ms 22088 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 5 ms 860 KB Output is correct
17 Correct 98 ms 12368 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 600 KB Output is correct
20 Correct 48 ms 5944 KB Output is correct
21 Correct 155 ms 22356 KB Output is correct
22 Correct 180 ms 22096 KB Output is correct
23 Correct 166 ms 22236 KB Output is correct
24 Correct 166 ms 22092 KB Output is correct
25 Correct 61 ms 12372 KB Output is correct
26 Correct 61 ms 12372 KB Output is correct
27 Correct 161 ms 22096 KB Output is correct
28 Correct 152 ms 22328 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 7 ms 1372 KB Output is correct
9 Correct 167 ms 22068 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 8 ms 1416 KB Output is correct
13 Correct 150 ms 22176 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 856 KB Output is correct
17 Correct 68 ms 12364 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 38 ms 5976 KB Output is correct
22 Correct 151 ms 22096 KB Output is correct
23 Correct 150 ms 22100 KB Output is correct
24 Correct 163 ms 22108 KB Output is correct
25 Correct 63 ms 12372 KB Output is correct
26 Correct 63 ms 12364 KB Output is correct
27 Correct 156 ms 22200 KB Output is correct
28 Correct 163 ms 22092 KB Output is correct
29 Correct 75 ms 12372 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 41 ms 5776 KB Output is correct
5 Correct 155 ms 22124 KB Output is correct
6 Correct 152 ms 22256 KB Output is correct
7 Correct 159 ms 22096 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 38 ms 5916 KB Output is correct
10 Correct 154 ms 22272 KB Output is correct
11 Correct 146 ms 22100 KB Output is correct
12 Correct 162 ms 22100 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 37 ms 5832 KB Output is correct
17 Correct 159 ms 22284 KB Output is correct
18 Correct 151 ms 22096 KB Output is correct
19 Correct 152 ms 22352 KB Output is correct
20 Correct 157 ms 22292 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 8 ms 1368 KB Output is correct
7 Correct 155 ms 22280 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 7 ms 1416 KB Output is correct
13 Correct 170 ms 22088 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 5 ms 860 KB Output is correct
17 Correct 98 ms 12368 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 600 KB Output is correct
20 Correct 48 ms 5944 KB Output is correct
21 Correct 155 ms 22356 KB Output is correct
22 Correct 180 ms 22096 KB Output is correct
23 Correct 166 ms 22236 KB Output is correct
24 Correct 166 ms 22092 KB Output is correct
25 Correct 61 ms 12372 KB Output is correct
26 Correct 61 ms 12372 KB Output is correct
27 Correct 161 ms 22096 KB Output is correct
28 Correct 152 ms 22328 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 344 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 7 ms 1372 KB Output is correct
37 Correct 167 ms 22068 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 8 ms 1416 KB Output is correct
41 Correct 150 ms 22176 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 3 ms 856 KB Output is correct
45 Correct 68 ms 12364 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 38 ms 5976 KB Output is correct
50 Correct 151 ms 22096 KB Output is correct
51 Correct 150 ms 22100 KB Output is correct
52 Correct 163 ms 22108 KB Output is correct
53 Correct 63 ms 12372 KB Output is correct
54 Correct 63 ms 12364 KB Output is correct
55 Correct 156 ms 22200 KB Output is correct
56 Correct 163 ms 22092 KB Output is correct
57 Correct 75 ms 12372 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 3 ms 856 KB Output is correct
61 Correct 73 ms 12344 KB Output is correct
62 Correct 0 ms 344 KB Output is correct
63 Correct 1 ms 348 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 39 ms 5856 KB Output is correct
66 Correct 74 ms 12348 KB Output is correct
67 Correct 62 ms 12368 KB Output is correct
68 Correct 61 ms 12360 KB Output is correct
69 Correct 59 ms 12360 KB Output is correct

Subtask #6
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 8 ms 1368 KB Output is correct
7 Correct 155 ms 22280 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 7 ms 1416 KB Output is correct
13 Correct 170 ms 22088 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 5 ms 860 KB Output is correct
17 Correct 98 ms 12368 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 600 KB Output is correct
20 Correct 48 ms 5944 KB Output is correct
21 Correct 155 ms 22356 KB Output is correct
22 Correct 180 ms 22096 KB Output is correct
23 Correct 166 ms 22236 KB Output is correct
24 Correct 166 ms 22092 KB Output is correct
25 Correct 61 ms 12372 KB Output is correct
26 Correct 61 ms 12372 KB Output is correct
27 Correct 161 ms 22096 KB Output is correct
28 Correct 152 ms 22328 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 344 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 7 ms 1372 KB Output is correct
37 Correct 167 ms 22068 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 8 ms 1416 KB Output is correct
41 Correct 150 ms 22176 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 3 ms 856 KB Output is correct
45 Correct 68 ms 12364 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 38 ms 5976 KB Output is correct
50 Correct 151 ms 22096 KB Output is correct
51 Correct 150 ms 22100 KB Output is correct
52 Correct 163 ms 22108 KB Output is correct
53 Correct 63 ms 12372 KB Output is correct
54 Correct 63 ms 12364 KB Output is correct
55 Correct 156 ms 22200 KB Output is correct
56 Correct 163 ms 22092 KB Output is correct
57 Correct 75 ms 12372 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 344 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 41 ms 5776 KB Output is correct
62 Correct 155 ms 22124 KB Output is correct
63 Correct 152 ms 22256 KB Output is correct
64 Correct 159 ms 22096 KB Output is correct
65 Correct 0 ms 348 KB Output is correct
66 Correct 38 ms 5916 KB Output is correct
67 Correct 154 ms 22272 KB Output is correct
68 Correct 146 ms 22100 KB Output is correct
69 Correct 162 ms 22100 KB Output is correct
70 Correct 0 ms 344 KB Output is correct
71 Correct 0 ms 348 KB Output is correct
72 Correct 0 ms 348 KB Output is correct
73 Correct 37 ms 5832 KB Output is correct
74 Correct 159 ms 22284 KB Output is correct
75 Correct 151 ms 22096 KB Output is correct
76 Correct 152 ms 22352 KB Output is correct
77 Correct 157 ms 22292 KB Output is correct
78 Correct 0 ms 348 KB Output is correct
79 Correct 0 ms 348 KB Output is correct
80 Correct 3 ms 856 KB Output is correct
81 Correct 73 ms 12344 KB Output is correct
82 Correct 0 ms 344 KB Output is correct
83 Correct 1 ms 348 KB Output is correct
84 Correct 0 ms 348 KB Output is correct
85 Correct 39 ms 5856 KB Output is correct
86 Correct 74 ms 12348 KB Output is correct
87 Correct 62 ms 12368 KB Output is correct
88 Correct 61 ms 12360 KB Output is correct
89 Correct 59 ms 12360 KB Output is correct
90 Correct 0 ms 344 KB Output is correct
91 Correct 0 ms 348 KB Output is correct
92 Correct 3 ms 860 KB Output is correct
93 Correct 64 ms 12116 KB Output is correct
94 Correct 0 ms 348 KB Output is correct
95 Correct 0 ms 348 KB Output is correct
96 Correct 1 ms 488 KB Output is correct
97 Correct 15 ms 3824 KB Output is correct
98 Correct 61 ms 13520 KB Output is correct
99 Correct 61 ms 13432 KB Output is correct
100 Correct 60 ms 13396 KB Output is correct
101 Correct 59 ms 13396 KB Output is correct
102 Correct 60 ms 13552 KB Output is correct
103 Correct 78 ms 13372 KB Output is correct
104 Correct 61 ms 13876 KB Output is correct
105 Correct 64 ms 13612 KB Output is correct