#include <bits/stdc++.h>
//#include<ext/pb_ds/assoc_container.hpp>
//#include<ext/pb_ds/tree_policy.hpp>
using namespace std;
//using namespace __gnu_pbds;
typedef long long ll;
typedef long double ld;
typedef unsigned int ui;
#define ii pair<int,int>
#define pll pair<ll,ll>
#define vi vector<int>
#define vii vector<ii>
#define vll vector<ll>
#define vpll vector<pll>
#define matrix vector<vi>
#define matrixLL vector<vll>
#define vs vector<string>
#define vui vector<ui>
#define msi multiset<int>
#define mss multiset<string>
#define si set<int>
#define ss set<string>
#define PB push_back
#define PF push_front
#define PPB pop_back
#define PPF pop_front
#define X first
#define Y second
#define MP make_pair
#define FOR(i, a, b) for (int i = int(a); i < int(b); i++)
#define REP(i, n) FOR(i, 0, n)
#define all(x) (x).begin(), (x).end()
#define pld pair<ld, ld>
const int dx[] = {-1, 1, 0, 0};
const int dy[] = {0, 0, -1, 1};
const int dxx[] = {-1, 1, 0, 0, 1, 1, -1, -1};
const int dyy[] = {0, 0, -1, 1, -1, 1, -1, 1};
const string abc="abcdefghijklmnopqrstuvwxyz";
const string ABC="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const ld pi = 3.14159265;
const int mod = 1e9 + 7;
const int MOD = 1e9 + 7;
const int MAXN = 1e6 + 7;
const int inf = mod;
const ll INF = 1e18;
const ll zero = ll(0);
const int logo = 20;
const int off = 1 << logo;
const int trsz = off << 1;
const ld eps = 1e-10;
int ccw(pll a, pll b, pll c){
ll val = a.X * (b.Y - c.Y) + b.X * (c.Y - a.Y) + c.X * (a.Y - b.Y);
if(val > 0) return 1;
if(val == 0) return 0;
return -1;
}
vpll arr;
vi cv;
int pos[MAXN];
matrix op;
bool cmp(int ai, int bi){
pll a = arr[ai], b = arr[bi];
int cv = ccw({0, 0}, a, b);
if(cv == 0) return a.X < b.X;
return cv > 0;
}
bool cmp2(vi a, vi b){
if(pos[a[0]] == pos[b[0]]){
return pos[a[1]] < pos[b[1]];
}
return pos[a[0]] < pos[b[0]];
}
bool same(ld a, ld b){
if(abs(a - b) < eps) return 1;
return 0;
}
ld dist(pll r){
return (ld)sqrt((ld)r.X * r.X + (ld)r.Y * r.Y);
}
//s desno od r
ld dis(pld r, pld s){
if(!same(r.X, s.X) and r.X > s.X) swap(r, s);
ld val = min(r.X * r.X + r.Y * r.Y, s.X * s.X + s.Y * s.Y);
val = (ld)sqrt(val);
if(s.X == r.X or s.Y == r.Y) return val;
ld a = (ld)(s.Y - r.Y) / (ld)(s.X - r.X);
if(a == 1) return val;
ld b = r.Y - r.X * a;
ld opx = (ld)(-b) / (ld)((ld)a + (ld)1 / (ld)a);
ld opy = opx * a + b;
if(opx >= min(r.X, s.X) and opx <= max(r.X, s.X) and opy >= min(r.Y, s.Y) and opy <= max(r.Y, s.Y)){
val = min(val, (ld)sqrt(opx * opx + opy * opy));
}
return val;
}
struct cmp3{
bool operator()(ld a, ld b){
//if(abs(a - b) < eps) return 1;
return a < b;
}
};
multiset<ld, cmp3> ud;
bool bgoreq(ld a, ld b){
if(abs(a - b) < eps) return 1;
return a > b;
}
void solve(){
int n;
cin >> n;
arr.resize(n);
REP(i, n) cin >> arr[i].X >> arr[i].Y, cv.PB(i);
sort(all(cv), cmp);
REP(i, n) pos[cv[i]] = i;
REP(i, n){
int nx = (i + 1) % n;
int ni = i;
if(pos[i] > pos[nx]) swap(ni, nx);
op.PB({ni, nx, 1});
op.PB({nx, (ni + 1) * 1000, -1});
}
sort(all(op), cmp2);
vi sol; sol.clear();
for(auto &x : op){
if(x[2] == -1){
x[1] /= 1000;
x[1]--;
}
ld val = dis(arr[x[0]], arr[x[1]]);
if(x[2] == 1){
if(ud.empty() or bgoreq(*ud.begin(), dist(arr[x[0]]))) sol.PB(x[0] + 1);
ud.insert(val);
}else{
ud.erase(ud.find(val));
if(ud.empty() or bgoreq(*ud.begin(), dist(arr[x[0]]))) sol.PB(x[0] + 1);
}
}
if(sol.empty()){
cout << 0;
return;
}
sort(all(sol));
sol.erase(unique(all(sol)), sol.end());
cout << sol.size() << "\n";
for(auto &x : sol) cout << x << " ";
cout << "\n";
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
int t=1;
//cin >> t;
while(t--)solve();
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Incorrect |
3 ms |
468 KB |
Output isn't correct |
| 3 |
Runtime error |
3 ms |
1364 KB |
Execution killed with signal 11 |
| 4 |
Runtime error |
12 ms |
1544 KB |
Execution killed with signal 11 |
| 5 |
Runtime error |
7 ms |
3336 KB |
Execution killed with signal 11 |
| 6 |
Runtime error |
7 ms |
3348 KB |
Execution killed with signal 11 |
| 7 |
Runtime error |
15 ms |
6096 KB |
Execution killed with signal 11 |
| 8 |
Runtime error |
6 ms |
2680 KB |
Execution killed with signal 11 |
| 9 |
Runtime error |
8 ms |
2928 KB |
Execution killed with signal 11 |
| 10 |
Runtime error |
8 ms |
3344 KB |
Execution killed with signal 11 |
| 11 |
Runtime error |
9 ms |
3640 KB |
Execution killed with signal 11 |
| 12 |
Runtime error |
15 ms |
6140 KB |
Execution killed with signal 11 |
| 13 |
Runtime error |
20 ms |
8928 KB |
Execution killed with signal 11 |
| 14 |
Runtime error |
23 ms |
11604 KB |
Execution killed with signal 11 |
| 15 |
Runtime error |
34 ms |
14476 KB |
Execution killed with signal 11 |
| 16 |
Runtime error |
73 ms |
28600 KB |
Execution killed with signal 11 |
| 17 |
Runtime error |
68 ms |
28724 KB |
Execution killed with signal 11 |
| 18 |
Execution timed out |
147 ms |
56840 KB |
Time limit exceeded |
| 19 |
Execution timed out |
151 ms |
56872 KB |
Time limit exceeded |
| 20 |
Execution timed out |
127 ms |
57128 KB |
Time limit exceeded |
