oj.uz

Submission #1024255

# Submission time Handle Problem Language Result Execution time Memory
1024255 2024-07-15T20:28:47 Z Abito Fountain Parks (IOI21_parks) C++17
5 / 100
 183 ms 52688 KB 
#include "parks.h"
#include <bits/stdc++.h>
#define pb push_back
#define ep insert
#define F first
#define S second
using namespace std;
const int N=2e5+5;
int a[N],b[N],par[N],sz[N],n;
vector<int> c[N],r[N];
vector<int> adj[N];
bool cmp(int x,int y){
    return a[x]<a[y];
}
bool cmp2(int x,int y){
    return b[x]>b[y];
}
int getpar(int x){
    if (x==par[x]) return x;
    return par[x]=getpar(par[x]);
}
void link(int x,int y){
    x=getpar(x);
    y=getpar(y);
    if (x==y) return;
    if (sz[x]>sz[y]) swap(x,y);
    sz[y]+=sz[x];
    par[x]=y;
    return;
}
int construct_roads(std::vector<int> x, std::vector<int> y) {
    if (x.size() == 1) {
	build({}, {}, {}, {});
        return 1;
    }
    n=x.size();
    for (int i=0;i<n;i++){
        par[i]=i;
        sz[i]=1;
        a[i]=x[i];
        b[i]=y[i];
        c[y[i]].pb(i);
        r[x[i]].pb(i);
    }
    vector<int> U,V,s;
    for (int i=0;i<N;i+=2) sort(c[i].begin(),c[i].end(),cmp);
    for (int i=0;i<N;i+=2){
        for (int j=0;j<int(c[i].size())-1;j++){
            if (a[c[i][j+1]]-a[c[i][j]]==2){
                link(c[i][j],c[i][j+1]);
                U.pb(c[i][j]);
                V.pb(c[i][j+1]);
                s.pb(0);
                adj[c[i][j]].pb(U.size()-1);
                adj[c[i][j+1]].pb(U.size()-1);
            }
        }
    }
    for (int i=N-1;i>=0;i--){
        for (int j=0;j<int(c[i].size());j++){
            int l=0,r=int(c[i+2].size())-1,mid,idx=-1;
            while (l<=r){
                mid=(l+r)/2;
                if (a[c[i+2][mid]]==a[c[i][j]]){
                    idx=mid;
                    break;
                }
                if (a[c[i+2][mid]]>a[c[i][j]]) r=mid-1;
                else l=mid+1;
            }
            if (idx!=-1){
                if (getpar(c[i][j])==getpar(c[i+2][idx])) continue;
                link(c[i][j],c[i+2][idx]);
                V.pb(c[i][j]);
                U.pb(c[i+2][idx]);
                s.pb(2);
                adj[c[i][j]].pb(U.size()-1);
                adj[c[i+2][idx]].pb(U.size()-1);
            }
        }
    }
    //for (int i=0;i<U.size();i++) cout<<U[i]<<' '<<V[i]<<endl;
    if (sz[getpar(0)]!=n) return 0;
    //for (int i=0;i<N;i+=2) sort(r[i].begin(),r[i].end(),cmp2);
    vector<int> d(U.size()),e(U.size());
    set<pair<int,int>> bench;
    bool h=0;
    int last=-1;
    for (int i=0;i<U.size();i++){
        if (s[i]==0) continue;
        if (a[U[i]]!=last){
            last=a[U[i]];
            h=0;
        }
        if (!h){
            d[i]=a[U[i]]-1;
            e[i]=b[U[i]]-1;
            bench.ep({d[i],e[i]});
            h=!h;
        }
        else{
            d[i]=a[U[i]]+1;
            e[i]=b[U[i]]-1;
            bench.ep({d[i],e[i]});
            h=!h;
        }
    }
    //for (auto u:bench) cout<<u.F<<' '<<u.S<<endl;
    for (int i=0;i<U.size();i++){
        if (s[i]==2) continue;
        int xx=a[U[i]]+1,yy=b[U[i]]+1;
        if (!bench.count({xx,yy})){
            d[i]=xx;
            e[i]=yy;
            bench.ep({xx,yy});
            continue;
        }
        yy-=2;
        d[i]=xx;
        e[i]=yy;
        bench.ep({xx,yy});
    }
    build(U,V,d,e);
    return 1;
}

Compilation message

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:89:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |     for (int i=0;i<U.size();i++){
      |                  ~^~~~~~~~~
parks.cpp:109:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  109 |     for (int i=0;i<U.size();i++){
      |                  ~^~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14940 KB Output is correct
2 Correct 3 ms 16988 KB Output is correct
3 Correct 3 ms 16988 KB Output is correct
4 Correct 3 ms 16988 KB Output is correct
5 Correct 3 ms 16988 KB Output is correct
6 Correct 3 ms 16988 KB Output is correct
7 Correct 3 ms 16988 KB Output is correct
8 Correct 3 ms 16988 KB Output is correct
9 Correct 72 ms 35384 KB Output is correct
10 Correct 14 ms 18780 KB Output is correct
11 Correct 34 ms 26716 KB Output is correct
12 Correct 13 ms 19800 KB Output is correct
13 Correct 12 ms 21160 KB Output is correct
14 Correct 3 ms 16988 KB Output is correct
15 Correct 3 ms 17008 KB Output is correct
16 Correct 76 ms 35276 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14940 KB Output is correct
2 Correct 3 ms 16988 KB Output is correct
3 Correct 3 ms 16988 KB Output is correct
4 Correct 3 ms 16988 KB Output is correct
5 Correct 3 ms 16988 KB Output is correct
6 Correct 3 ms 16988 KB Output is correct
7 Correct 3 ms 16988 KB Output is correct
8 Correct 3 ms 16988 KB Output is correct
9 Correct 72 ms 35384 KB Output is correct
10 Correct 14 ms 18780 KB Output is correct
11 Correct 34 ms 26716 KB Output is correct
12 Correct 13 ms 19800 KB Output is correct
13 Correct 12 ms 21160 KB Output is correct
14 Correct 3 ms 16988 KB Output is correct
15 Correct 3 ms 17008 KB Output is correct
16 Correct 76 ms 35276 KB Output is correct
17 Correct 3 ms 16988 KB Output is correct
18 Correct 3 ms 16988 KB Output is correct
19 Correct 3 ms 16988 KB Output is correct
20 Incorrect 3 ms 16988 KB Tree @(3, 3) appears more than once: for edges on positions 0 and 1
21 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14940 KB Output is correct
2 Correct 3 ms 16988 KB Output is correct
3 Correct 3 ms 16988 KB Output is correct
4 Correct 3 ms 16988 KB Output is correct
5 Correct 3 ms 16988 KB Output is correct
6 Correct 3 ms 16988 KB Output is correct
7 Correct 3 ms 16988 KB Output is correct
8 Correct 3 ms 16988 KB Output is correct
9 Correct 72 ms 35384 KB Output is correct
10 Correct 14 ms 18780 KB Output is correct
11 Correct 34 ms 26716 KB Output is correct
12 Correct 13 ms 19800 KB Output is correct
13 Correct 12 ms 21160 KB Output is correct
14 Correct 3 ms 16988 KB Output is correct
15 Correct 3 ms 17008 KB Output is correct
16 Correct 76 ms 35276 KB Output is correct
17 Correct 3 ms 16988 KB Output is correct
18 Correct 3 ms 16988 KB Output is correct
19 Correct 3 ms 16988 KB Output is correct
20 Incorrect 3 ms 16988 KB Tree @(3, 3) appears more than once: for edges on positions 0 and 1
21 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14940 KB Output is correct
2 Correct 3 ms 16988 KB Output is correct
3 Correct 3 ms 16988 KB Output is correct
4 Correct 3 ms 16988 KB Output is correct
5 Correct 3 ms 16988 KB Output is correct
6 Correct 3 ms 16988 KB Output is correct
7 Correct 3 ms 16988 KB Output is correct
8 Correct 3 ms 16988 KB Output is correct
9 Correct 72 ms 35384 KB Output is correct
10 Correct 14 ms 18780 KB Output is correct
11 Correct 34 ms 26716 KB Output is correct
12 Correct 13 ms 19800 KB Output is correct
13 Correct 12 ms 21160 KB Output is correct
14 Correct 3 ms 16988 KB Output is correct
15 Correct 3 ms 17008 KB Output is correct
16 Correct 76 ms 35276 KB Output is correct
17 Correct 3 ms 16988 KB Output is correct
18 Correct 3 ms 16988 KB Output is correct
19 Correct 3 ms 16988 KB Output is correct
20 Correct 170 ms 52688 KB Output is correct
21 Correct 157 ms 49772 KB Output is correct
22 Correct 177 ms 49716 KB Output is correct
23 Correct 130 ms 45108 KB Output is correct
24 Correct 42 ms 22616 KB Output is correct
25 Correct 67 ms 31024 KB Output is correct
26 Correct 70 ms 30988 KB Output is correct
27 Correct 146 ms 48432 KB Output is correct
28 Correct 183 ms 48496 KB Output is correct
29 Correct 134 ms 48432 KB Output is correct
30 Correct 152 ms 48492 KB Output is correct
31 Correct 4 ms 16984 KB Output is correct
32 Incorrect 12 ms 19548 KB Tree @(185945, 20997) appears more than once: for edges on positions 7091 and 7118
33 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14940 KB Output is correct
2 Correct 3 ms 16988 KB Output is correct
3 Correct 3 ms 16988 KB Output is correct
4 Correct 3 ms 16988 KB Output is correct
5 Correct 3 ms 16988 KB Output is correct
6 Correct 3 ms 16988 KB Output is correct
7 Correct 3 ms 16988 KB Output is correct
8 Correct 3 ms 16988 KB Output is correct
9 Correct 72 ms 35384 KB Output is correct
10 Correct 14 ms 18780 KB Output is correct
11 Correct 34 ms 26716 KB Output is correct
12 Correct 13 ms 19800 KB Output is correct
13 Correct 12 ms 21160 KB Output is correct
14 Correct 3 ms 16988 KB Output is correct
15 Correct 3 ms 17008 KB Output is correct
16 Correct 76 ms 35276 KB Output is correct
17 Correct 161 ms 50356 KB Output is correct
18 Incorrect 153 ms 50480 KB Tree @(50001, 50001) appears more than once: for edges on positions 49999 and 150000
19 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14940 KB Output is correct
2 Correct 3 ms 16988 KB Output is correct
3 Correct 3 ms 16988 KB Output is correct
4 Correct 3 ms 16988 KB Output is correct
5 Correct 3 ms 16988 KB Output is correct
6 Correct 3 ms 16988 KB Output is correct
7 Correct 3 ms 16988 KB Output is correct
8 Correct 3 ms 16988 KB Output is correct
9 Correct 72 ms 35384 KB Output is correct
10 Correct 14 ms 18780 KB Output is correct
11 Correct 34 ms 26716 KB Output is correct
12 Correct 13 ms 19800 KB Output is correct
13 Correct 12 ms 21160 KB Output is correct
14 Correct 3 ms 16988 KB Output is correct
15 Correct 3 ms 17008 KB Output is correct
16 Correct 76 ms 35276 KB Output is correct
17 Correct 3 ms 16988 KB Output is correct
18 Correct 3 ms 16988 KB Output is correct
19 Correct 3 ms 16988 KB Output is correct
20 Incorrect 3 ms 16988 KB Tree @(3, 3) appears more than once: for edges on positions 0 and 1
21 Halted 0 ms 0 KB -