#include <bits/stdc++.h>
using namespace std;
const int N = 100005;
const bool debug = 0;
int n, q, p[N][20], op, x, fen[N], L, pos[N];
vector<int> adj[N], ord;
bool mark[N];
void add(int i, int val) {
for (; i<=n; i+=i&(-i)) fen[i] += val;
return;
}
int sum(int i) {
int ret = 0;
for (; i>0; i-=i&(-i)) ret += fen[i];
return ret;
}
int find_first(int l, int r) {
if (l == r) return l;
int m = (l+r)/2;
if (sum(m) == 0) find_first(m+1, r);
else find_first(l, m);
}
void find_ord(int v) {
for (int i=1; i<=L; i++) p[v][i] = p[p[v][i-1]][i-1];
for (auto to : adj[v]) {
find_ord(to);
}
ord.push_back(v);
return;
}
pair<int, int> find_lift(int v) {
int ti = 0;
for (int i=L; i>=0; i--) {
if (!mark[p[v][i]]) v = p[v][i], ti += pow(2, i);
}
return make_pair(v, ti);
}
int main() {
scanf(" %d %d", &n, &q);
L = ceil(log2(n + 1));
for (int i=1; i<=n; i++) {
scanf(" %d", &p[i][0]);
adj[p[i][0]].push_back(i);
}
ord.push_back(0);
find_ord(adj[0][0]);
for (int i=1; i<=n; i++) pos[ord[i]] = i;
if (debug) {
printf("ord : ");
for (auto it : ord) printf("%d ", it);
printf("\npos : ");
for (int i=0; i<=n; i++) printf("%d ", pos[i]);
printf("\n");
for (int i=1; i<=n; i++) {
printf("lift %d : ", i);
for (int j=0; j<=L; j++) printf("%d ", p[i][j]);
printf("\n");
}
}
mark[0] = true;
for (int i=1; i<=n; i++) add(i, 1), mark[i] = true;
while (q--) {
scanf(" %d %d", &op, &x);
if (op == 1) {
int idx;
for (int i=1; i<=x; i++) {
idx = find_first(1, n);
add(idx, -1);
mark[ord[idx]] = false;
}
printf("%d\n", ord[idx]);
}
else {
pair<int, int> p = find_lift(x);
add(pos[p.first], 1);
mark[p.first] = true;
printf("%d\n", p.second);
}
if (debug) {
printf("sum : ");
for (int i=1; i<=n; i++) printf("%d ", sum(i));
printf("\n");
}
}
return 0;
}
/*
8 10
0
1
2
2
3
3
4
6
1 3
2 5
1 1
13 20
0
1
1
2
2
3
3
4
4
5
5
6
6
*/
Compilation message
ballmachine.cpp: In function 'int find_first(int, int)':
ballmachine.cpp:26:1: warning: control reaches end of non-void function [-Wreturn-type]
26 | }
| ^
ballmachine.cpp: In function 'int main()':
ballmachine.cpp:46:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
46 | scanf(" %d %d", &n, &q);
| ~~~~~^~~~~~~~~~~~~~~~~~
ballmachine.cpp:49:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
49 | scanf(" %d", &p[i][0]);
| ~~~~~^~~~~~~~~~~~~~~~~
ballmachine.cpp:72:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
72 | scanf(" %d %d", &op, &x);
| ~~~~~^~~~~~~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
70 ms |
131076 KB |
Execution killed with signal 9 |
2 |
Runtime error |
85 ms |
131076 KB |
Execution killed with signal 9 |
3 |
Runtime error |
87 ms |
131076 KB |
Execution killed with signal 9 |
4 |
Runtime error |
69 ms |
131076 KB |
Execution killed with signal 9 |
5 |
Runtime error |
68 ms |
131076 KB |
Execution killed with signal 9 |
6 |
Runtime error |
65 ms |
131076 KB |
Execution killed with signal 9 |
7 |
Runtime error |
69 ms |
131076 KB |
Execution killed with signal 9 |
8 |
Runtime error |
68 ms |
131076 KB |
Execution killed with signal 9 |
9 |
Runtime error |
79 ms |
131076 KB |
Execution killed with signal 9 |
10 |
Runtime error |
71 ms |
131076 KB |
Execution killed with signal 9 |
11 |
Runtime error |
98 ms |
131076 KB |
Execution killed with signal 9 |
12 |
Runtime error |
91 ms |
131076 KB |
Execution killed with signal 9 |
13 |
Runtime error |
94 ms |
131076 KB |
Execution killed with signal 9 |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
76 ms |
131076 KB |
Execution killed with signal 9 |
2 |
Runtime error |
135 ms |
131076 KB |
Execution killed with signal 9 |
3 |
Runtime error |
100 ms |
131076 KB |
Execution killed with signal 9 |
4 |
Runtime error |
76 ms |
131076 KB |
Execution killed with signal 9 |
5 |
Runtime error |
98 ms |
131076 KB |
Execution killed with signal 9 |
6 |
Runtime error |
77 ms |
131076 KB |
Execution killed with signal 9 |
7 |
Runtime error |
76 ms |
131076 KB |
Execution killed with signal 9 |
8 |
Runtime error |
76 ms |
131076 KB |
Execution killed with signal 9 |
9 |
Runtime error |
114 ms |
131076 KB |
Execution killed with signal 9 |
10 |
Runtime error |
113 ms |
131076 KB |
Execution killed with signal 9 |
11 |
Runtime error |
118 ms |
131076 KB |
Execution killed with signal 9 |
12 |
Runtime error |
132 ms |
131076 KB |
Execution killed with signal 9 |
13 |
Runtime error |
109 ms |
131076 KB |
Execution killed with signal 9 |
14 |
Runtime error |
96 ms |
131076 KB |
Execution killed with signal 9 |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
85 ms |
131076 KB |
Execution killed with signal 9 |
2 |
Runtime error |
129 ms |
131076 KB |
Execution killed with signal 9 |
3 |
Runtime error |
126 ms |
131076 KB |
Execution killed with signal 9 |
4 |
Runtime error |
101 ms |
131076 KB |
Execution killed with signal 9 |
5 |
Runtime error |
110 ms |
131076 KB |
Execution killed with signal 9 |
6 |
Runtime error |
111 ms |
131076 KB |
Execution killed with signal 9 |
7 |
Runtime error |
106 ms |
131076 KB |
Execution killed with signal 9 |
8 |
Runtime error |
99 ms |
131076 KB |
Execution killed with signal 9 |
9 |
Runtime error |
127 ms |
131076 KB |
Execution killed with signal 9 |
10 |
Runtime error |
129 ms |
131076 KB |
Execution killed with signal 9 |
11 |
Runtime error |
120 ms |
131076 KB |
Execution killed with signal 9 |
12 |
Runtime error |
117 ms |
131076 KB |
Execution killed with signal 9 |
13 |
Runtime error |
119 ms |
131076 KB |
Execution killed with signal 9 |
14 |
Runtime error |
98 ms |
131076 KB |
Execution killed with signal 9 |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
107 ms |
131076 KB |
Execution killed with signal 9 |
2 |
Runtime error |
122 ms |
131076 KB |
Execution killed with signal 9 |
3 |
Runtime error |
120 ms |
131076 KB |
Execution killed with signal 9 |
4 |
Runtime error |
115 ms |
131076 KB |
Execution killed with signal 9 |
5 |
Runtime error |
134 ms |
131076 KB |
Execution killed with signal 9 |
6 |
Runtime error |
140 ms |
131076 KB |
Execution killed with signal 9 |
7 |
Runtime error |
116 ms |
131076 KB |
Execution killed with signal 9 |
8 |
Runtime error |
134 ms |
131076 KB |
Execution killed with signal 9 |
9 |
Runtime error |
99 ms |
131076 KB |
Execution killed with signal 9 |