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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#742287 | #9432. Permutation | KXG | RE | 0ms | 0kb | C++14 | 3.3kb | 2024-11-13 16:17:34 | 2024-11-13 16:17:39 |
answer
#include <vector>
#include <cstdio>
#include <bits/extc++.h>
using namespace std;
typedef __gnu_pbds::tree<int, __gnu_pbds::null_type, less<int>, __gnu_pbds::rb_tree_tag, __gnu_pbds::tree_order_statistics_node_update> rbtree;
int n, ans[1010];
int query(vector<int> a) {
printf("0 ");
for (int i = 0; i < n; i++) {
printf("%d ", a[i]);
}
printf("\n");
fflush(stdout);
int x;
scanf("%d", &x);
return x;
}
int fa[1010], dir[1010];
int find(int x) {
if (fa[x] == x) return x;
return fa[x] = find(fa[x]);
}
void merge(int x, int y) {
fa[find(x)] = find(y);
}
void solve(int l, int r, vector<int> S, int t) {
if (l == r) {
ans[l] = S[0];
return;
}
int mid = (l + r) >> 1;
rbtree now;
for (int i : S) {
now.insert(i);
dir[i] = 0;
}
for (int i = l; i <= r; i++) {
fa[i] = i;
}
while (true) {
if (now.size() < 2) break;
int siz = now.size();
int xid = rand() % siz, yid = rand() % siz;
if (xid == yid) continue;
auto xit = now.find_by_order(xid);
auto yit = now.find_by_order(yid);
int x = *xit, y = *yit;
vector<int> que;
for (int i = 1; i <= n; i++) {
if (i < l || i > r) {
que.push_back(t);
} else if (i <= mid) {
que.push_back(x);
} else {
que.push_back(y);
}
}
int res = query(que);
if (res == 0) {
dir[x] = 1;
dir[y] = -1;
now.erase(xit);
now.erase(yit);
} else if (res == 2) {
dir[x] = -1;
dir[y] = 1;
now.erase(xit);
now.erase(yit);
} else {
merge(x, y);
now.erase(xit);
}
}
// printf("%d %d Ok %d\n", l, r, now.size());
int left = 0, right = 0;
for (int i : S) {
if (dir[i] == -1) {
left = i;
}
if (dir[i] == 1) {
right = i;
}
}
if (now.size() == 1) {
int x = *now.begin();
if (left == 0) {
dir[x] = -1;
} else if (right == 0) {
dir[x] = 1;
} else {
vector<int> que;
for (int i = 1; i <= n; i++) {
if (i < l || i > r) {
que.push_back(t);
} else if (i <= mid) {
que.push_back(x);
} else {
que.push_back(left);
}
}
int res = query(que);
if (res == 0) {
dir[x] = 1;
} else {
dir[x] = -1;
}
}
}
vector<int> ls, rs;
for (int i : S) {
dir[i] = dir[find(i)];
if (dir[i] == -1) {
ls.push_back(i);
} else {
rs.push_back(i);
}
}
solve(l, mid, ls, ls.front());
solve(mid + 1, r, rs, rs.front());
}
int main() {
scanf("%d", &n);
vector<int> S;
for (int i = 1; i <= n; i++) {
S.push_back(i);
}
solve(1, n, S, 0);
printf("1 ");
for (int i = 1; i <= n; i++) {
printf("%d ", ans[i]);
}
fflush(stdout);
return 0;
}
Details
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Test #1:
score: 0
Runtime Error
input:
5 1 2 0 1 2 1 2
output:
0 4 4 4 2 2 0 2 2 2 5 5 0 1 1 1 3 3 0 4 4 3 2 2 0 3 3 2 2 2 0 4 3 2 2 2 0 3 2 2 2 2