Submission #8827447
Source Code Expand
#include <cmath> #include <iostream> #include <iomanip> #include <queue> #include <vector> using namespace std; typedef long long ll; struct Node { int id; double cost; Node() {} Node(int i, double c) : id(i), cost(c) {} friend bool operator < (const Node& lhs, const Node& rhs) { return lhs.cost > rhs.cost; }; friend bool operator > (const Node& lhs, const Node& rhs) { return rhs < lhs; }; friend bool operator <= (const Node& lhs, const Node& rhs) { return !(lhs > rhs); }; friend bool operator >= (const Node& lhs, const Node& rhs) { return !(lhs < rhs); }; }; struct Point { ll x, y, r; }; double dist[1002][1002]; double cost[1002]; bool visit[1002]; double INF = 1e60; double distance(const Point& from, const Point& to) { return max(0.0, sqrt((from.x-to.x)*(from.x-to.x)+(from.y-to.y)*(from.y-to.y))-from.r-to.r); } void dijkstra(int n) { int s = 0; for (int i = 0; i < n+2; ++i) { cost[i] = INF; } cost[0] = 0; priority_queue<Node> pq; pq.push(Node(s, 0)); while (!pq.empty()) { Node from = pq.top(); pq.pop(); // cerr << from.id << " " << from.cost << endl; if (visit[from.id]) continue; visit[from.id] = true; for (int to = 0; to < n+2; ++to) { if (from.id == to || visit[to]) continue; double c = cost[from.id]+dist[from.id][to]; if (c > cost[to]) continue; cost[to] = c; pq.push(Node(to, c)); } } } int main() { int xs, ys, xt, yt; cin >> xs >> ys >> xt >> yt; int n; cin >> n; vector<Point> lp; lp.push_back((Point){xs, ys, 0}); for (int i = 0; i < n; ++i) { int x, y, r; cin >> x >> y >> r; lp.push_back((Point){x, y, r}); } lp.push_back((Point){xt, yt, 0}); for (int i = 0; i < n+2; ++i) { for (int j = 0; j < n+2; ++j) { dist[i][j] = distance(lp[i], lp[j]); // cerr << i << " " << j << " " << dist[i][j] << endl; } } dijkstra(n); cout << setprecision(12) << cost[n+1] << endl; }
Submission Info
Submission Time | |
---|---|
Task | E - Cosmic Rays |
User | sash |
Language | C++14 (GCC 5.4.1) |
Score | 600 |
Code Size | 2035 Byte |
Status | AC |
Exec Time | 96 ms |
Memory | 14340 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 600 / 600 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | 0_00.txt, 0_01.txt, 0_02.txt |
All | 0_00.txt, 0_01.txt, 0_02.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt, 1_11.txt, 1_12.txt, 1_13.txt, 1_14.txt, 1_15.txt, 1_16.txt, 1_17.txt, 1_18.txt, 1_19.txt, 1_20.txt, 1_21.txt, 1_22.txt, 1_23.txt, 1_24.txt, 1_25.txt, 1_26.txt, 1_27.txt, 1_28.txt, 1_29.txt, 1_30.txt, 1_31.txt, 1_32.txt, 1_33.txt, 1_34.txt, 1_35.txt, 1_36.txt, 1_37.txt, 1_38.txt, 1_39.txt, 1_40.txt, 1_41.txt, 1_42.txt, 1_43.txt, 1_44.txt, 1_45.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
0_00.txt | AC | 1 ms | 256 KB |
0_01.txt | AC | 1 ms | 256 KB |
0_02.txt | AC | 1 ms | 256 KB |
1_00.txt | AC | 1 ms | 256 KB |
1_01.txt | AC | 1 ms | 256 KB |
1_02.txt | AC | 20 ms | 8592 KB |
1_03.txt | AC | 19 ms | 8720 KB |
1_04.txt | AC | 18 ms | 8448 KB |
1_05.txt | AC | 21 ms | 8848 KB |
1_06.txt | AC | 23 ms | 10248 KB |
1_07.txt | AC | 19 ms | 8720 KB |
1_08.txt | AC | 20 ms | 8720 KB |
1_09.txt | AC | 19 ms | 8464 KB |
1_10.txt | AC | 19 ms | 8464 KB |
1_11.txt | AC | 19 ms | 8448 KB |
1_12.txt | AC | 19 ms | 8720 KB |
1_13.txt | AC | 26 ms | 12676 KB |
1_14.txt | AC | 20 ms | 8720 KB |
1_15.txt | AC | 21 ms | 8720 KB |
1_16.txt | AC | 19 ms | 8464 KB |
1_17.txt | AC | 20 ms | 8720 KB |
1_18.txt | AC | 20 ms | 8720 KB |
1_19.txt | AC | 21 ms | 8720 KB |
1_20.txt | AC | 21 ms | 9228 KB |
1_21.txt | AC | 18 ms | 8336 KB |
1_22.txt | AC | 20 ms | 8720 KB |
1_23.txt | AC | 20 ms | 8720 KB |
1_24.txt | AC | 20 ms | 8720 KB |
1_25.txt | AC | 19 ms | 8464 KB |
1_26.txt | AC | 21 ms | 8720 KB |
1_27.txt | AC | 19 ms | 8592 KB |
1_28.txt | AC | 20 ms | 8720 KB |
1_29.txt | AC | 20 ms | 8720 KB |
1_30.txt | AC | 20 ms | 9228 KB |
1_31.txt | AC | 20 ms | 9228 KB |
1_32.txt | AC | 19 ms | 8720 KB |
1_33.txt | AC | 20 ms | 8448 KB |
1_34.txt | AC | 16 ms | 8064 KB |
1_35.txt | AC | 16 ms | 8192 KB |
1_36.txt | AC | 16 ms | 8192 KB |
1_37.txt | AC | 16 ms | 8064 KB |
1_38.txt | AC | 96 ms | 14340 KB |
1_39.txt | AC | 96 ms | 14084 KB |
1_40.txt | AC | 94 ms | 13572 KB |
1_41.txt | AC | 96 ms | 13700 KB |
1_42.txt | AC | 18 ms | 8592 KB |
1_43.txt | AC | 21 ms | 9356 KB |
1_44.txt | AC | 20 ms | 8720 KB |
1_45.txt | AC | 23 ms | 9228 KB |