#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp> // Common file
// #include <ext/pb_ds/tree_policy.hpp> // Including tree_order_statistics_node_update
using namespace std;
// using namespace __gnu_pbds;
#define debug(s) cerr << #s << " = " << s << '\n'
#define all(v) (v).begin(), (v).end()
#define mem(a,val) memset(a, val, sizeof a)
#define ff first
#define ss second
typedef long long ll;
// typedef tree<pair<int, int>,null_type,less<pair<int, int>>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
const int N = 100010;
int n, q, ptr, root;
int T[N], P[N][20], col[N], val[N];
vector<int> adj[N];
set<pair<int, int>> s;
struct dat {
int val, node;
bool operator<(const dat &a) const {
return val > a.val;
}
};
int dfs0(int from, int u) {
priority_queue<dat> pq;
for (auto v: adj[u]) {
if (v == from) continue;
pq.push({dfs0(v, u), v});
}
adj[u].clear();
int ret = u;
while (!pq.empty()) {
adj[u].push_back(pq.top().node);
ret = min(ret, pq.top().val);
pq.pop();
}
}
void dfs(int from, int u) {
T[u] = from;
for (auto v: adj[u]){
if (v == from) continue;
dfs(u, v);
}
val[u] = ptr;
s.insert({ptr++, u});
}
void init() {
int i, j;
for (i = 1; i <= n; i++)
for (j = 0; j < 18; j++)
P[i][j] = -1;
for (i = 1; i <= n; i++)
P[i][0] = T[i];
for (j = 1; j < 18; j++)
for (i = 1; i <= n; i++)
if (P[i][j - 1] != -1)
P[i][j] = P[P[i][j - 1]][j - 1];
}
int main() {
scanf("%d %d", &n, &q);
for (int i = 1; i <= n; ++i) {
int x;
scanf("%d", &x);
if (x == 0) root = i;
adj[x].push_back(i);
}
dfs0(-1, root);
dfs(-1, root);
init();
while (q--) {
int ty, v;
scanf("%d %d", &ty, &v);
if (ty == 1) {
int ret;
while (v--) {
int node = (*s.begin()).ss;
col[node] = 1;
ret = node;
s.erase({val[node], node});
}
printf("%d\n", ret);
}
else {
int ret = 0;
for (int i = 16; i >= 0; --i) {
if (col[P[v][i]]) {
ret += (1 << i);
v = P[v][i];
}
}
col[v] = 0;
s.insert({val[v], v});
printf("%d\n", ret);
}
}
}
Compilation message
ballmachine.cpp: In function 'int dfs0(int, int)':
ballmachine.cpp:45:1: warning: no return statement in function returning non-void [-Wreturn-type]
}
^
ballmachine.cpp: In function 'int main()':
ballmachine.cpp:72:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &n, &q);
~~~~~^~~~~~~~~~~~~~~~~
ballmachine.cpp:75:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &x);
~~~~~^~~~~~~~~~
ballmachine.cpp:84:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &ty, &v);
~~~~~^~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
80 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 2 |
Runtime error |
98 ms |
131072 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 3 |
Runtime error |
93 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 4 |
Runtime error |
85 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 5 |
Runtime error |
80 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 6 |
Runtime error |
76 ms |
131072 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 7 |
Runtime error |
80 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 8 |
Runtime error |
76 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 9 |
Runtime error |
89 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 10 |
Runtime error |
84 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 11 |
Runtime error |
92 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 12 |
Runtime error |
97 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 13 |
Runtime error |
93 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
49 ms |
7672 KB |
Output is correct |
| 2 |
Runtime error |
97 ms |
131072 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 3 |
Runtime error |
102 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 4 |
Runtime error |
96 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 5 |
Runtime error |
85 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 6 |
Incorrect |
76 ms |
9336 KB |
Output isn't correct |
| 7 |
Runtime error |
108 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 8 |
Correct |
51 ms |
7672 KB |
Output is correct |
| 9 |
Runtime error |
97 ms |
131072 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 10 |
Runtime error |
99 ms |
131072 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 11 |
Incorrect |
160 ms |
23032 KB |
Output isn't correct |
| 12 |
Runtime error |
104 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 13 |
Correct |
114 ms |
24184 KB |
Output is correct |
| 14 |
Runtime error |
94 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
85 ms |
131072 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 2 |
Runtime error |
103 ms |
131072 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 3 |
Correct |
139 ms |
22392 KB |
Output is correct |
| 4 |
Runtime error |
97 ms |
131072 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 5 |
Runtime error |
96 ms |
131072 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 6 |
Runtime error |
95 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 7 |
Runtime error |
92 ms |
131072 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 8 |
Correct |
140 ms |
22520 KB |
Output is correct |
| 9 |
Runtime error |
98 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 10 |
Incorrect |
206 ms |
23184 KB |
Output isn't correct |
| 11 |
Incorrect |
210 ms |
23176 KB |
Output isn't correct |
| 12 |
Runtime error |
102 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 13 |
Correct |
201 ms |
27640 KB |
Output is correct |
| 14 |
Runtime error |
96 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
103 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 2 |
Runtime error |
102 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 3 |
Correct |
131 ms |
27000 KB |
Output is correct |
| 4 |
Runtime error |
99 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 5 |
Incorrect |
203 ms |
23276 KB |
Output isn't correct |
| 6 |
Runtime error |
104 ms |
131072 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 7 |
Runtime error |
104 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 8 |
Correct |
134 ms |
27000 KB |
Output is correct |
| 9 |
Runtime error |
97 ms |
131076 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
