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답안 #437651

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
437651 2021-06-26T17:43:58 Z Pajaraja 분수 공원 (IOI21_parks) C++17
0 / 100
 93 ms 19416 KB 
#include "parks.h"
#include <bits/stdc++.h>
#define MAXN 200007
using namespace std;
map<pair<int,int>,int> ind;
std::vector<int> u, v, a, b, x, y,nd;
int dsu[MAXN];
int root(int u)
{
    while(dsu[u]!=u)
    {
        dsu[u]=dsu[dsu[u]];
        u=dsu[u];
    }
    return u;
}
void connect(int u,int v)
{
    int a=root(u),b=root(v);
    if(a==b) return;
    dsu[a]=b;
}
bool cmp(int p,int q) {return x[nd[p]]+y[nd[p]]>x[nd[q]]+y[nd[q]];}
void addroad(int p,int q)
{
    int x1=x[p],y1=y[p],x2=x[q],y2=y[q];
    u.push_back(p); v.push_back(q);
    connect(p,q);
    if(x1==x2)
    {
        b.push_back((y1+y2)/2);
        if((x1+y1)&2) a.push_back(x1-1);
        else a.push_back(x1+1);
    }
    else
    {
        a.push_back((x1+x2)/2);
        if((x1+y1)&2) b.push_back(y1+1);
        else b.push_back(y1-1);
    }
}
int construct_roads(std::vector<int> X, std::vector<int> Y) {
    int n=X.size(); x=X; y=Y;
    for(int i=0;i<n;i++) {ind[{x[i],y[i]}]=i+1; dsu[i]=i; nd.push_back(i);}
    sort(nd.begin(),nd.end(),cmp);
    for(int i=0;i<n;i++)
    {
        int c=nd[i]; int ea=ind[{x[c]+2,y[c]}]-1,no=ind[{x[c],y[c]+2}]-1;
        if(ea==-1 && no==-1) continue;
        if(ea!=-1 && no==-1) addroad(c,ea);
        if(ea==-1 && no!=-1) addroad(c,no);
        if(ea!=-1 && no!=-1)
        {
            if(root(ea)!=root(no)) {addroad(c,ea); addroad(c,no);}
            else
            {
                if((x[c]+y[c])&2) addroad(c,no);
                else addroad(c,ea);
            }
        }
    }
    if(u.size()!=n-1) return 0;
    build(u, v, a, b);
    return 1;
}

Compilation message

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:62:16: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   62 |     if(u.size()!=n-1) return 0;
      |        ~~~~~~~~^~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Runtime error 93 ms 19416 KB Execution killed with signal 11
10 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Runtime error 93 ms 19416 KB Execution killed with signal 11
10 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Runtime error 93 ms 19416 KB Execution killed with signal 11
10 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Runtime error 93 ms 19416 KB Execution killed with signal 11
10 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Runtime error 93 ms 19416 KB Execution killed with signal 11
10 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Runtime error 93 ms 19416 KB Execution killed with signal 11
10 Halted 0 ms 0 KB -