# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
555854 |
2022-05-01T17:01:59 Z |
Magi |
Park (BOI16_park) |
C++14 |
|
5 ms |
468 KB |
#include <iostream>
#include <vector>
#define ll long long
using namespace std;
const int NMAX = 2e3;
int n, m, w, h, viz[NMAX+10];
vector <int> nod[NMAX+10];
struct circle{
int x, y, r;
bool intersectEdge(int t){
if(!t)
return y - r < 0;
if(t == 1)
return x + r > w;
if(t == 2)
return y + r > h;
return x - r < 0;
}
bool intersectCircle(const circle& other){
return (ll)(x - other.x) * (ll)(x - other.x) + (ll)(y - other.y) * (ll)(y - other.y) < (ll)(r + other.r) * (ll)(r + other.r);
}
}v[NMAX+10];
void dfs(int x, int col){
viz[x] = col;
for(auto u : nod[x])
if(!viz[u])
dfs(u, col);
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
cin >> n >> m >> w >> h;
for(int i=1; i<=n; i++)
cin >> v[i].x >> v[i].y >> v[i].r;
//solving subtask 1 (only 1 query)
int r1, e;
cin >> r1 >> e;
for(int i=1; i<=n; i++)
v[i].r += r1;
for(int i=1; i<=n; i++){
//check collision with edges
for(int t=0; t<4; t++)
if(v[i].intersectEdge(t)){
nod[i+3].push_back(t);
nod[t].push_back(i+3);
}
//check collision with other circles
for(int j=i+1; j<=n; j++)
if(v[i].intersectCircle(v[j])){
nod[i+3].push_back(j+3);
nod[j+3].push_back(i+3);
}
}
int col = 0;
for(int t=0; t<4; t++){
if(viz[t])
continue;
dfs(t, ++col);
}
e--;
bool ans[4];
for(int t=0; t<4; t++)
ans[t] = false;
ans[e] = true;
if(viz[e] != viz[(e+3)%4]){
//adjacent counterclockwise
if(viz[e] != viz[(e+2)%4] && viz[e] != viz[(e+1)%4])
ans[(e+1)%4] = true;
//opposite
if(viz[e] != viz[(e+2)%4] && viz[(e+1)%4] != viz[(e+3)%4] && viz[(e+1)%4] != viz[(e+2)%4])
ans[(e+2)%4] = true;
//adjacent clockwise
if(viz[(e+1)%4] != viz[(e+3)%4] && viz[(e+2)%4] != viz[(e+3)%4])
ans[(e+3)%4] = true;
}
for(int t=0; t<4; t++)
if(ans[t])
cout << t + 1;
cout << '\n';
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
468 KB |
Output is correct |
2 |
Correct |
5 ms |
468 KB |
Output is correct |
3 |
Incorrect |
5 ms |
468 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
468 KB |
Output is correct |
2 |
Correct |
5 ms |
468 KB |
Output is correct |
3 |
Incorrect |
5 ms |
468 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |