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Submission #796562

# Submission time Handle Problem Language Result Execution time Memory
796562 2023-07-28T13:56:54 Z Khizri Fountain Parks (IOI21_parks) C++17
5 / 100
 462 ms 44112 KB 
#include "parks.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define F first
#define S second
#define INF 1e18
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pii pair<int,int>
#define pll pair<ll,ll>
#define OK cout<<"Ok"<<endl;
#define MOD (ll)(1e9+7)
const int mxn=2e5+5;
int n,x[mxn],y[mxn],p[mxn],sz[mxn];
int ax[4]={1,1,-1,-1};
int ay[4]={-1,1,1,-1};
vector<pair<pii,int>>vt;
map<pii,int>mp;
vector<int>adj[mxn];
int fnd(int u){
    if(p[u]==u) return u;
    return p[u]=fnd(p[u]);
}
void Union(int u,int v){
    u=fnd(u);
    v=fnd(v);
    if(u!=v){
        if(sz[u]>sz[v]) swap(u,v);
        sz[u]+=sz[v];
        p[v]=u;
    }
}
bool cmp(pair<pii,int> a,pair<pii,int> b){
    return a.F.S<b.F.S;
}
int construct_roads(vector<int> xx, vector<int> yy) {
    n=xx.size();
    if(n==1){
        build({},{},{},{});
        return 1;
    }
    for(int i=0;i<n;i++){
        vt.pb({{xx[i],yy[i]},i+1});
        mp[{xx[i],yy[i]}]=i+1;
        x[i+1]=xx[i];
        y[i+1]=yy[i];
    }
    set<pii>st;
    for(int i=1;i<=n;i++){
        p[i]=i;
        sz[i]=1;
    }
    vector<int>idxl,idxr,posl,posr;
    sort(all(vt));
    for(int i=1;i<n;i++){
        if(abs(vt[i].F.F-vt[i-1].F.F)+abs(vt[i].F.S-vt[i-1].F.S)==2){
            Union(vt[i-1].S,vt[i].S);
        }
    }
    sort(all(vt),cmp);
    for(int i=1;i<n;i++){
        if(abs(vt[i].F.F-vt[i-1].F.F)+abs(vt[i].F.S-vt[i-1].F.S)==2){
            Union(vt[i-1].S,vt[i].S);
        }
    }
    if(sz[fnd(1)]!=n) return 0;
    for(int i=1;i<=n;i++){
        int l=x[i],r=y[i];
        int node=mp[{l,r}];
        int a=l+2,b=r;
        int c=l,d=r+2;
        int color=((l+r)/2)%2;
        int idx=mp[{a,b}];
        int idx2=mp[{c,d}];
        if(idx){
            int pos1=(l+a)/2,pos2=(r+b)/2;
            if(color){
                pos2++;
            }
            else{
                pos2++;
            }
            if(!st.count({pos1,pos2})){
                idxl.pb(node-1);
                idxr.pb(idx-1);
                posl.pb(pos1);
                posr.pb(pos2);
                st.insert({pos1,pos2});
            }
        }
        if(idx2){
            int pos1=(l+c)/2,pos2=(r+d)/2;
            if(color){
                pos1++;
            }
            else{
                pos1--;
            }
            if(!st.count({pos1,pos2})){
                idxl.pb(node-1);
                idxr.pb(idx2-1);
                posl.pb(pos1);
                posr.pb(pos2);
                st.insert({pos1,pos2});
            }
        }
    }
    build(idxl,idxr,posl,posr);
    return 1;
}
/*
 { g++ parks.cpp grader.cpp } ; if ($?) { .\a.exe }
9
2 2
2 4
2 6
4 2
4 4
4 6
6 2
6 4
6 6
*/

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 329 ms 33868 KB Output is correct
10 Correct 12 ms 7892 KB Output is correct
11 Correct 68 ms 20496 KB Output is correct
12 Correct 18 ms 9364 KB Output is correct
13 Correct 19 ms 10100 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct
15 Correct 3 ms 5204 KB Output is correct
16 Correct 238 ms 33864 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 329 ms 33868 KB Output is correct
10 Correct 12 ms 7892 KB Output is correct
11 Correct 68 ms 20496 KB Output is correct
12 Correct 18 ms 9364 KB Output is correct
13 Correct 19 ms 10100 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct
15 Correct 3 ms 5204 KB Output is correct
16 Correct 238 ms 33864 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Incorrect 3 ms 4948 KB Given structure is not connected: There is no path between vertices 0 and 2
19 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 329 ms 33868 KB Output is correct
10 Correct 12 ms 7892 KB Output is correct
11 Correct 68 ms 20496 KB Output is correct
12 Correct 18 ms 9364 KB Output is correct
13 Correct 19 ms 10100 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct
15 Correct 3 ms 5204 KB Output is correct
16 Correct 238 ms 33864 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Incorrect 3 ms 4948 KB Given structure is not connected: There is no path between vertices 0 and 2
19 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 329 ms 33868 KB Output is correct
10 Correct 12 ms 7892 KB Output is correct
11 Correct 68 ms 20496 KB Output is correct
12 Correct 18 ms 9364 KB Output is correct
13 Correct 19 ms 10100 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct
15 Correct 3 ms 5204 KB Output is correct
16 Correct 238 ms 33864 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Incorrect 462 ms 44112 KB Given structure is not connected: There is no path between vertices 0 and 1
21 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 329 ms 33868 KB Output is correct
10 Correct 12 ms 7892 KB Output is correct
11 Correct 68 ms 20496 KB Output is correct
12 Correct 18 ms 9364 KB Output is correct
13 Correct 19 ms 10100 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct
15 Correct 3 ms 5204 KB Output is correct
16 Correct 238 ms 33864 KB Output is correct
17 Incorrect 192 ms 26776 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 329 ms 33868 KB Output is correct
10 Correct 12 ms 7892 KB Output is correct
11 Correct 68 ms 20496 KB Output is correct
12 Correct 18 ms 9364 KB Output is correct
13 Correct 19 ms 10100 KB Output is correct
14 Correct 3 ms 5076 KB Output is correct
15 Correct 3 ms 5204 KB Output is correct
16 Correct 238 ms 33864 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Incorrect 3 ms 4948 KB Given structure is not connected: There is no path between vertices 0 and 2
19 Halted 0 ms 0 KB -