# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
1104553 | vjudge1 | Tropical Garden (IOI11_garden) | C++17 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "garden.h"
#include "gardenlib.h"
#include<bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
const int MxN = 1005;
int n, m, p, q, g, r[MxN][2], ans;
vector<pii> v[MxN];
void dfs (int cur, int dist, int w) {
if (dist == g && cur == p) return void(ans++);
if (dist >= g) return;
bool ok = 0;
if (v[cur].size() >= 1 && v[cur][0].first != w) {
auto [x, y] = v[cur][0];
dfs(y, dist + 1, x); ok = 1;
}
if (!ok && v[cur].size() >= 2 && v[cur][1].first != w) {
auto [x, y] = v[cur][1];
dfs(y, dist + 1, x); ok = 1;
}
if (!ok) {
auto [x, y] = v[cur][0];
dfs(y, dist + 1, x);
}
}
void count_routes(int N, int M, int P, int R[][2], int Q, int G[]){
n = N; m = M; p = P; q = Q; g = G[0];
for (int i = 0; i < m; i++) {
r[i][0] = R[i][0]; r[i][1] = R[i][1];
v[r[i][0]].emplace_back(i, r[i][1]);
v[r[i][1]].emplace_back(i, r[i][0]);
}
for (int i = 0; i < n; i++) sort(v[i].begin(), v[i].end());
for (int i = 0; i < n; i++) dfs(i, 0, -1, {});
answer(ans);
}