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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#96553 | #6303. Inversion | hath19260817 | WA | 268ms | 17272kb | C++20 | 1.5kb | 2023-04-14 14:40:37 | 2023-04-14 14:40:39 |
Judging History
answer
#include <cstdio>
#include <cstring>
const int maxn = 2e3 + 5;
int f[maxn][maxn], rk[maxn], ans[maxn], pos[maxn], n = 0;
int ask(int x, int y) {
if (f[x][y] != -1)
return f[x][y];
printf("? %d %d\n", x, y);
fflush(stdout);
scanf("%d", &f[x][y]);
return f[x][y];
}
int ask_local(int x, int y) {
if (f[x][y] != -1)
return f[x][y];
if (y == x + 1)
return pos[x] > pos[y];
return f[x][y] = ((ask_local(x + 1, y) + ask_local(x, y - 1) - ask_local(x + 1, y - 1) + (pos[x] > pos[y]) + 8) & 1);
}
int query(int x, int y) {
if (y == x + 1)
return ask(x, y);
return (ask(x, y) - ask_local(x, y - 1) - ask(x + 1, y) + ask_local(x + 1, y - 1) + 8) & 1;
}
int get_pos(int x) {
int l = 1, r = rk[0], ans = 1;
while (l <= r) {
int mid = (l + r) >> 1;
if (query(rk[mid], x))
r = mid - 1;
else
l = mid + 1, ans = l;
}
return ans;
}
int main() {
memset(f, -1, sizeof(f));
scanf("%d", &n);
for (int i = 1; i <= n; ++i)
f[i][i] = 0;
rk[0] = rk[1] = 1;
for (int i = 2; i <= n; ++i) {
int p = get_pos(i);
for (int j = rk[0]; j >= p; --j)
rk[j + 1] = rk[j], ++pos[rk[j]];
rk[p] = i, ++rk[0], pos[rk[p]] = i;
}
for (int i = 1; i <= n; ++i)
ans[rk[i]] = i;
putchar('!');
for (int i = 1; i <= n; ++i)
printf(" %d", ans[i]);
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 17212kb
input:
3 0 0 1
output:
? 1 2 ? 1 3 ? 2 3 ! 2 3 1
result:
ok OK, guesses=3
Test #2:
score: -100
Wrong Answer
time: 268ms
memory: 17272kb
input:
1993 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 1 0 1 0 0 0 1 1 1 1 1 1 1 1 1 1 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1 1 0 1 0 0 1 1 0 0 1 1 1 1 1 0 0 0 0 0 0 0 1 0 1 1 0 1 0 1 0 1 1 1 1 0 1 1 0 1 1 1 0 0 1 0 0 1 0 0 0 0 1 1 0 0 1 0 1 0 0 1 1 1 1 1 1 1 0 1 0 0 1 0 0 0 1 1 0 0 0 1 1 0 1 1 1 1 1 0 1 1 1 0...
output:
? 1 2 ? 1 3 ? 2 3 ? 2 4 ? 3 4 ? 2 5 ? 3 5 ? 1 5 ? 2 6 ? 3 6 ? 5 6 ? 1 6 ? 1 7 ? 2 7 ? 5 7 ? 6 7 ? 1 8 ? 2 8 ? 3 8 ? 4 8 ? 1 9 ? 2 9 ? 8 9 ? 3 9 ? 9 10 ? 5 10 ? 6 10 ? 7 10 ? 8 10 ? 1 11 ? 2 11 ? 10 11 ? 5 11 ? 6 11 ? 7 11 ? 1 12 ? 2 12 ? 8 12 ? 9 12 ? 3 12 ? 4 12 ? 5 12 ? 1 13 ? 2 13 ? 8 13 ? 9 13 ?...
result:
wrong answer Wa.