File size: 2,754 Bytes
14c9c2b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | #include <bits/stdc++.h>
using namespace std;
int main() {
int n;
scanf("%d", &n);
if (n == 1) {
printf("1 1\n");
fflush(stdout);
return 0;
}
auto ask = [&](const vector<int>& qq) -> int {
printf("0");
for (int i = 1; i <= n; ++i) {
printf(" %d", qq[i]);
}
printf("\n");
fflush(stdout);
int x;
scanf("%d", &x);
return x;
};
vector<int> s(n + 1);
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
bool found = false;
int attempts = 0;
while (!found && attempts < 30) {
vector<int> q(n + 1);
for (int i = 1; i <= n; ++i) q[i] = i;
shuffle(q.begin() + 1, q.begin() + n + 1, rng);
int x = ask(q);
if (x == 0) {
s = q;
found = true;
}
++attempts;
}
assert(found);
vector<int> signature(n + 1, 0);
for (int kk = 1; kk <= n; ++kk) {
int bits = 0;
for (int b = 0; b < 9; ++b) {
vector<int> qq(n + 1);
for (int i = 1; i <= n; ++i) qq[i] = s[i];
for (int i = 1; i <= n; ++i) {
if (((i - 1) & (1 << b)) != 0) {
qq[i] = kk;
}
}
int x = ask(qq);
if (x != 0) {
bits |= (1 << b);
}
}
signature[kk] = bits;
}
vector<vector<int>> groups(512);
for (int kk = 1; kk <= n; ++kk) {
int r = signature[kk];
groups[r].push_back(kk);
}
vector<int> perm(n + 1);
for (int r = 0; r < 512; ++r) {
auto& ks = groups[r];
if (ks.empty()) continue;
vector<int> poss;
int base_val = r;
for (int k = 0;; ++k) {
int ii = base_val + 1 + 512 * k;
if (ii > n) break;
poss.push_back(ii);
}
int num = ks.size();
assert((int)poss.size() == num);
if (num == 1) {
int i = poss[0];
int kk = ks[0];
perm[i] = kk;
} else {
int i1 = poss[0];
int i2 = poss[1];
int k1 = ks[0];
int k2 = ks[1];
if (k1 > k2) swap(k1, k2);
vector<int> qq(n + 1);
for (int j = 1; j <= n; ++j) qq[j] = s[j];
qq[i1] = k1;
int x = ask(qq);
if (x == 1) {
perm[i1] = k1;
perm[i2] = k2;
} else {
perm[i1] = k2;
perm[i2] = k1;
}
}
}
printf("1");
for (int i = 1; i <= n; ++i) {
printf(" %d", perm[i]);
}
printf("\n");
fflush(stdout);
return 0;
} |