# | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
696412 | 2023-02-06T12:39:33 Z | Cross_Ratio | Through Another Maze Darkly (CCO21_day1problem3) | C++14 | 9000 ms | 305680 KB |
#include <bits/stdc++.h> #define int long long using namespace std; vector<int> adj[800005]; int num[800005]; void dfs(int c, int p) { int i, j; if(p == -1) { int n = num[c]; vector<int> V(adj[c].size()); int sz = adj[c].size(); for(i=0;i<sz;i++) { V[i] = adj[c][(i+n)%sz]; } adj[c] = V; num[c] = (num[c] + sz - n) % sz; } else { int n = -1; int sz = adj[c].size(); for(i=0;i<sz;i++) { if(adj[c][i]==p) n = i; } vector<int> V(sz); for(i=0;i<sz;i++) { V[i] = adj[c][(i+n)%sz]; } adj[c] = V; num[c] = (num[c] + sz - n) % sz; } for(int n : adj[c]) { if(n ==p) continue; dfs(n, c); } } int sz[800005]; bool B[800005]; int dfs_cnt = 0; int A[1600005]; int C[800005]; int par[800005]; int ord[800005]; void dfs2(int c, int p) { sz[c] = 1; par[c] = p; C[c] = dfs_cnt; for(int n : adj[c]) { if(n==p) continue; A[dfs_cnt++] = c; dfs2(n, c); ord[c]++; sz[c] += sz[n]; } if(sz[c] == 1) B[c] = true; A[dfs_cnt++] = c; } vector<array<int, 2>> Query; int ans[800005]; signed main() { cin.sync_with_stdio(false); cin.tie(0); cout.tie(0); int N, Q; cin >> N >> Q; int i, j; for(i=0;i<N;i++) { int k; cin >> k; for(j=0;j<k;j++) { int c; cin >> c; adj[i].push_back(c-1); } num[i] = 1 % k; } dfs(0, -1); dfs2(0, -1); //cout << "dfs done\n"; int ma = 0; for(i=0;i<Q;i++) { int a; cin >> a; if(a >= N*N) { a = (a - N*N) % (2*(N-1)) + N*N; } ma = max(ma, a); Query.push_back({a, i}); } sort(Query.begin(),Query.end()); int pt = 0, cnt = 0; int qt = 0; for(i=0;i<N;i++) { if(B[i] && par[i] != -1) ord[par[i]]--; } //cout << "Finding Graph\n"; while(qt < Query.size() && !B[0]) { //cout << pt << ' ' << cnt << '\n'; for(i=0;i<N;i++) cout << B[i] << ' '; //cout << '\n'; if(B[pt]) { while(qt < Query.size() && Query[qt][0] < cnt + 2 * (sz[pt]-1)) { int v = Query[qt][0] - cnt; ans[Query[qt][1]] = A[C[pt]+v]; qt++; } cnt += 2*(sz[pt] - 1); pt = par[pt]; } else { cnt++; int p2 = adj[pt][num[pt]]; num[pt] = (num[pt] + 1) % adj[pt].size(); if(p2 == par[pt] && ord[pt]==0) { B[pt] = true; if(par[pt] != -1) ord[par[pt]]--; } if(p2 == par[pt] && p2 == 0 && ord[0] == 0 && num[0] == 0) { B[0] = true; } pt = p2; while(qt < Query.size() && Query[qt][0]==cnt) { ans[Query[qt][1]] = pt; qt++; } } } while(qt < Query.size()) { int v = (Query[qt][0] - cnt) % (2*(N-1)); ans[Query[qt][1]] = A[v]; qt++; } for(i=0;i<Q;i++) cout << ans[i]+1 << '\n'; }
Compilation message
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Incorrect | 9 ms | 19156 KB | Output isn't correct |
2 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Incorrect | 18 ms | 19396 KB | Output isn't correct |
2 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Execution timed out | 9044 ms | 305680 KB | Time limit exceeded |
2 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Incorrect | 9 ms | 19156 KB | Output isn't correct |
2 | Halted | 0 ms | 0 KB | - |