#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
struct Point { int x, y; } p[101010];
struct SP;
struct Node { // Node in tree decomposition
int idx[2];
double dist;
Node(int _u, int _v) : dist(hypot(p[_u].x - p[_v].x, p[_u].y - p[_v].y)) {
idx[0] = _u;
idx[1] = _v;
}
Node *complement;
vector<Node *> anc;
vector<SP> anc_sp;
};
struct SP { // Shortest path between two nodes in tree decomposition
int idx[2][2];
double cost[2][2];
SP(Node *u) {
idx[0][0] = idx[1][0] = u->idx[0];
idx[0][1] = idx[1][1] = u->idx[1];
cost[0][0] = cost[1][1] = 0;
cost[0][1] = cost[1][0] = u->dist;
}
SP(Node *u, Node *v) {
assert(u->anc[0] == v);
idx[0][0] = u->idx[0], idx[0][1] = u->idx[1];
idx[1][0] = v->idx[0], idx[1][1] = v->idx[1];
if (u->idx[0] == v->idx[0]) {
cost[0][0] = 0;
cost[0][1] = v->dist;
cost[1][0] = u->dist;
cost[1][1] = u->complement->dist;
} else {
cost[0][0] = v->dist;
cost[0][1] = 0;
cost[1][0] = u->complement->dist;
cost[1][1] = u->dist;
}
}
SP(SP a, SP b) {
assert(a.idx[1][0] == b.idx[0][0] && a.idx[1][1] == b.idx[0][1]);
idx[0][0] = a.idx[0][0], idx[0][1] = a.idx[0][1];
idx[1][0] = b.idx[1][0], idx[1][1] = b.idx[1][1];
for (int i : {0, 1}) for (int j : {0, 1})
cost[i][j] = min(a.cost[i][0] + b.cost[0][j], a.cost[i][1] + b.cost[1][j]);
}
};
struct City { // City in original graph
int depth; // Depth in tree decomposition
Node *node[2];
City(int _d = -1, Node *_u = nullptr, Node *_v = nullptr) : depth(_d) {
node[0] = _u;
node[1] = _v;
}
} city[100001];
map<pair<int, int>, Node*> mp;
int main() {
cin.tie(0)->sync_with_stdio(0);
int n;
cin >> p[1].x >> p[1].y >> p[2].x >> p[2].y >> n;
mp[{1, 2}] = new Node(1, 2);
city[1] = city[2] = City(0, mp[{1, 2}], nullptr);
for (int cnt = 2; n; n--) {
char c;
cin >> c;
if (c == 'd') {
cnt++;
int a, b;
cin >> p[cnt].x >> p[cnt].y >> a >> b;
if (a > b) swap(a, b);
Node *par = mp[{a, b}];
Node *u = new Node(a, cnt), *v = new Node(b, cnt);
u->complement = v, v->complement = u;
u->anc.push_back(par);
u->anc_sp.push_back(SP(u, par));
for (int i = 0; i < u->anc.size() && i < u->anc[i]->anc.size(); i++) {
u->anc.push_back(u->anc[i]->anc[i]);
u->anc_sp.push_back(SP(u->anc_sp[i], u->anc[i]->anc_sp[i]));
}
mp[{a, cnt}] = u;
v->anc.push_back(par);
v->anc_sp.push_back(SP(v, par));
for (int i = 0; i < v->anc.size() && i < v->anc[i]->anc.size(); i++) {
v->anc.push_back(v->anc[i]->anc[i]);
v->anc_sp.push_back(SP(v->anc_sp[i], v->anc[i]->anc_sp[i]));
}
mp[{b, cnt}] = v;
city[cnt] = City(max(city[a].depth, city[b].depth) + 1, u, v);
} else {
int a, b;
cin >> a >> b;
if (city[a].depth < city[b].depth) swap(a, b);
double ans = 1e18;
for (int i : {0, 1}) for (int j : {0, 1}) if (city[a].node[i] && city[b].node[j]) {
Node *anode = city[a].node[i], *bnode = city[b].node[j];
SP asp = SP(anode), bsp = SP(bnode);
for (int k = 0, diff = city[a].depth - city[b].depth; diff; k++, diff >>= 1) {
if (diff & 1) {
asp = SP(asp, anode->anc_sp[k]);
anode = anode->anc[k];
}
}
for (int k = anode->anc.size() - 1; ~k; k--) {
if (anode->anc[k] != bnode->anc[k]) {
asp = SP(asp, anode->anc_sp[k]);
anode = anode->anc[k];
bsp = SP(bsp, bnode->anc_sp[k]);
bnode = bnode->anc[k];
}
}
if (anode != bnode)
asp = SP(asp, anode->anc_sp[0]), bsp = SP(bsp, bnode->anc_sp[0]);
for (int k : {0, 1}) for (int l : {0, 1}) if (asp.idx[0][k] == a && bsp.idx[0][l] == b)
for (int m : {0, 1}) for (int o : {0, 1}) if (asp.idx[1][m] == bsp.idx[1][o])
ans = min(ans, asp.cost[k][m] + bsp.cost[l][o]);
}
cout << fixed << setprecision(6) << ans << '\n';
}
}
return 0;
}
Compilation message
grad.cpp: In function 'int main()':
grad.cpp:99:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Node*>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
99 | for (int i = 0; i < u->anc.size() && i < u->anc[i]->anc.size(); i++) {
| ~~^~~~~~~~~~~~~~~
grad.cpp:99:52: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Node*>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
99 | for (int i = 0; i < u->anc.size() && i < u->anc[i]->anc.size(); i++) {
| ~~^~~~~~~~~~~~~~~~~~~~~~~
grad.cpp:107:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Node*>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
107 | for (int i = 0; i < v->anc.size() && i < v->anc[i]->anc.size(); i++) {
| ~~^~~~~~~~~~~~~~~
grad.cpp:107:52: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Node*>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
107 | for (int i = 0; i < v->anc.size() && i < v->anc[i]->anc.size(); i++) {
| ~~^~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
3 ms |
2796 KB |
5th numbers differ - expected: '30.07809', found: '33.56712', error = '3.48903' |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Runtime error |
6 ms |
5740 KB |
Execution killed with signal 6 (could be triggered by violating memory limits) |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
4 ms |
3436 KB |
13th numbers differ - expected: '631.09492', found: '657.63065', error = '26.53573' |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
204 ms |
76288 KB |
51st numbers differ - expected: '103304414.12022', found: '103326628.36033', error = '22214.24012' |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
332 ms |
111724 KB |
64th numbers differ - expected: '149700963.13445', found: '149719117.16012', error = '18154.02567' |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
397 ms |
108524 KB |
11th numbers differ - expected: '6117004.77612', found: '6119852.67622', error = '2847.90010' |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
383 ms |
98140 KB |
58th numbers differ - expected: '232453183.02092', found: '233046500.06574', error = '593317.04483' |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
460 ms |
108652 KB |
8th numbers differ - expected: '1553958.38121', found: '1554827.61443', error = '869.23322' |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
446 ms |
121068 KB |
15th numbers differ - expected: '15309.55422', found: '20429.70927', error = '5120.15505' |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
449 ms |
108552 KB |
5th numbers differ - expected: '96452815.17829', found: '96473575.83767', error = '20760.65938' |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
460 ms |
117548 KB |
26th numbers differ - expected: '1657400.10821', found: '1990551.66779', error = '333151.55958' |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
446 ms |
109932 KB |
5th numbers differ - expected: '481.13079', found: '495.53248', error = '14.40168' |
| 2 |
Halted |
0 ms |
0 KB |
- |
