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QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #278339 | #6838. Assumption is All You Need | rageOfThunder# | WA | 0ms | 3732kb | C++14 | 2.8kb | 2023-12-07 15:01:51 | 2023-12-07 15:01:52 |
Judging History
answer
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,sse4.1,sse4.2,popcnt,abm,mmx,avx,avx2,fma")
// MagicDark
#include <bits/stdc++.h>
#define debug cerr << "[" << __LINE__ << "] "
#define SZ(x) (int) x.size() - 1
#define all(x) x.begin(), x.end()
#define ms(x, y) memset(x, y, sizeof x)
#define F(i, x, y) for (int i = (x); i <= (y); i++)
#define DF(i, x, y) for (int i = (x); i >= (y); i--)
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
template <typename T> inline void chkmax(T &x, T y) {x = max(x, y);}
template <typename T> inline void chkmin(T &x, T y) {x = min(x, y);}
template <typename T> inline void read(T &x) {
x = 0; int f = 1; char c = getchar();
for (; !isdigit(c); c = getchar()) if (c == '-') f = -f;
for (; isdigit(c); c = getchar()) x = (x << 1) + (x << 3) + (c ^ 48);
x *= f;
}
inline void pc(char c) {
const int BUF = 1e6;
static char ch[BUF], *r = ch;
if (!c || r - ch == BUF) fwrite(ch, 1, r - ch, stdout), r = ch;
*r++ = c;
}
template <typename T> inline void write(T x) {
T l = 0;
ull y = 0;
if (!x) {pc(48); return;}
if (x < 0) {x = -x; pc('-');}
while (x) {y = y * 10 + x % 10; x /= 10; ++l;}
while (l) {pc(y % 10 + 48); y /= 10; --l;}
}
template <typename T> inline void writeln(T x) {write(x); pc('\n');}
template <typename T> inline void writes(T x) {write(x); pc(32);}
const int N = 2050;
int n, a[N], b[N], c[N], tot;
pair <int, int> ans[N * N];
void doit(int x, int y) {
swap(c[a[x]], c[a[y]]);
swap(a[x], a[y]);
ans[++tot] = make_pair(x, y);
}
void zhk() {
tot = 0;
read(n);
F(i, 1, n) read(a[i]), c[a[i]] = i;
F(i, 1, n) read(b[i]);
// vector <pair <int, int>> ans;
F(i, 1, n) {
if (a[i] < b[i]) {
writeln(-1);
return;
}
F(j, i + 1, n)
if (a[j] == b[i]) {
int pos = j;
F(k, a[j] + 1, a[i]) {
int t = c[k];
if (t < pos) {
doit(t, pos);
pos = t;
}
}
// while (pos > i) {
// int p = 0;
// DF(k, pos - 1, i) {
// if (a[k] > a[pos]) {
// if (!p) p = k;
// else if (a[k] < a[p]) p = k;
// }
// }
// doit(p, pos);
// // ans.emplace_back(p, pos);
// pos = p;
// }
// bool flag = true;
// F(k, i + 1, j - 1)
// if (a[k] < a[i] && a[k] > a[j]) {
// swap(a[i], a[k]);
// ans.emplace_back(i, k);
// flag = false;
// break;
// }
// swap(a[i], a[j]);
// ans.emplace_back(i, j);
break;
}
}
writeln(tot);
F(i, 1, tot) writes(ans[i].first), writeln(ans[i].second);
// for (auto [i, j]: ans) cout << i << ' ' << j << '\n';
}
signed main() {
int _ = 1;
read(_);
while (_--) zhk();
return pc(0), 0;
}
/* why?
*/
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3640kb
input:
3 2 1 2 2 1 4 4 1 2 3 1 3 2 4 8 8 7 6 5 4 3 2 1 1 8 7 6 5 4 3 2
output:
-1 2 1 2 2 4 7 7 8 6 7 5 6 4 5 3 4 2 3 1 2
result:
ok T=3
Test #2:
score: -100
Wrong Answer
time: 0ms
memory: 3732kb
input:
315 10 8 4 6 1 2 9 7 5 10 3 6 7 8 10 5 1 3 2 9 4 10 10 8 2 9 6 5 7 4 3 1 7 1 3 5 9 8 4 10 6 2 6 4 6 5 3 1 2 1 5 4 6 2 3 12 5 9 12 8 10 6 11 4 2 3 1 7 9 2 3 1 5 12 4 7 6 10 8 11 10 4 7 3 2 8 9 6 10 5 1 1 4 8 10 3 7 9 6 2 5 7 1 2 4 5 6 7 3 4 3 5 6 7 2 1 3 1 3 2 2 1 3 7 1 5 3 7 6 4 2 6 5 2 1 3 4 7 1 1 ...
output:
-1 -1 -1 -1 -1 -1 -1 -1 0 -1 -1 -1 -1 -1 -1 -1 0 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 3 4 5 1 4 2 4 -1 -1 -1 -1 -1 -1 0 0 -1 -1 -1 -1 -1 -1 0 0 -1 -1 0 -1 -1 -1 1 1 2 -1 2 1 2 2 3 -1 -1 0 -1 -1 2 2 3 3 4 -1 -1 -1 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 -1 -1 -1 -1 -1 -1 -1 -1 1 1 ...
result:
wrong answer Case #2: Jury has the answer but participant has not