#include <bits/stdc++.h>
using namespace std;
#define int int64_t
signed main() {
cin.tie(0);
ios_base::sync_with_stdio(0);
int n; cin >> n;
n*=2;
vector<int> a(n), b(n);
for (int &i: a) cin >> i;
for (int &i: b) cin >> i;
int la=0, ra=0;
int lb=0, rb=0;
int curra = 0;
int currb = 0;
vector<array<int, 4>> bcktrck(n);
for (int i = 0; i<n; i++) {
bcktrck[i] = {la, ra, lb, rb};
int nla=1e18, nra=-1e18;
if (a[i] >= curra) {
nla=min(nla,la+1);
nra=max(nra,ra+1);
}
if (a[i] >= currb) {
nla=min(nla,lb+1);
nra=max(nra,rb+1);
}
int nlb=1e18, nrb=-1e18;
if (b[i] >= curra) {
nlb=min(nlb,la);
nrb=max(nrb,ra);
}
if (b[i] >= currb) {
nlb=min(nlb,lb);
nrb=max(nrb,rb);
}
la=nla;
ra=nra;
lb=nlb;
rb=nrb;
curra = a[i];
currb = b[i];
}
// bcktrck.push_back({la, ra, lb, rb});
if (!(min(la, lb) <= n/2 && n/2 <= max(ra, rb))) {
cout << -1 << "\n";
return 0;
}
int currReq = n/2;
bool currCol = 0;
if (!(lb <= currReq && currReq <= rb)) currCol = 1;
string res;
for (int i = n-1; i>=0; i--) {
if (currCol) res.push_back('A');
else res.push_back('B');
currReq -= currCol;
int currVal = 0;
if (currCol) currVal = a[i];
if (!currCol) currVal = b[i];
if ((i==0?1:(currVal >= a[i-1])) && bcktrck[i][0] <= currReq && currReq <= bcktrck[i][1]) {
currCol = 1;
}
if ((i==0?1:(currVal >= b[i-1])) && bcktrck[i][2] <= currReq && currReq <= bcktrck[i][3]) {
currCol = 0;
}
}
reverse(res.begin(), res.end());
cout << res << "\n";
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
372 KB |
Output is correct |
| 6 |
Correct |
1 ms |
468 KB |
Output is correct |
| 7 |
Correct |
1 ms |
468 KB |
Output is correct |
| 8 |
Correct |
1 ms |
468 KB |
Output is correct |
| 9 |
Correct |
2 ms |
468 KB |
Output is correct |
| 10 |
Correct |
1 ms |
468 KB |
Output is correct |
| 11 |
Correct |
1 ms |
468 KB |
Output is correct |
| 12 |
Correct |
1 ms |
468 KB |
Output is correct |
| 13 |
Correct |
1 ms |
468 KB |
Output is correct |
| 14 |
Correct |
1 ms |
468 KB |
Output is correct |
| 15 |
Correct |
1 ms |
468 KB |
Output is correct |
| 16 |
Correct |
1 ms |
468 KB |
Output is correct |
| 17 |
Correct |
1 ms |
468 KB |
Output is correct |
| 18 |
Correct |
1 ms |
468 KB |
Output is correct |
| 19 |
Correct |
1 ms |
468 KB |
Output is correct |
| 20 |
Correct |
1 ms |
468 KB |
Output is correct |
| 21 |
Correct |
1 ms |
468 KB |
Output is correct |
| 22 |
Correct |
1 ms |
468 KB |
Output is correct |
| 23 |
Correct |
1 ms |
468 KB |
Output is correct |
| 24 |
Correct |
1 ms |
468 KB |
Output is correct |
| 25 |
Correct |
1 ms |
468 KB |
Output is correct |
| 26 |
Correct |
1 ms |
508 KB |
Output is correct |
| 27 |
Correct |
1 ms |
468 KB |
Output is correct |
| 28 |
Correct |
1 ms |
468 KB |
Output is correct |
| 29 |
Correct |
1 ms |
468 KB |
Output is correct |
| 30 |
Correct |
1 ms |
468 KB |
Output is correct |
| 31 |
Correct |
1 ms |
468 KB |
Output is correct |
| 32 |
Correct |
1 ms |
468 KB |
Output is correct |
| 33 |
Correct |
1 ms |
468 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
372 KB |
Output is correct |
| 6 |
Correct |
1 ms |
468 KB |
Output is correct |
| 7 |
Correct |
1 ms |
468 KB |
Output is correct |
| 8 |
Correct |
1 ms |
468 KB |
Output is correct |
| 9 |
Correct |
2 ms |
468 KB |
Output is correct |
| 10 |
Correct |
1 ms |
468 KB |
Output is correct |
| 11 |
Correct |
1 ms |
468 KB |
Output is correct |
| 12 |
Correct |
1 ms |
468 KB |
Output is correct |
| 13 |
Correct |
1 ms |
468 KB |
Output is correct |
| 14 |
Correct |
1 ms |
468 KB |
Output is correct |
| 15 |
Correct |
1 ms |
468 KB |
Output is correct |
| 16 |
Correct |
1 ms |
468 KB |
Output is correct |
| 17 |
Correct |
1 ms |
468 KB |
Output is correct |
| 18 |
Correct |
1 ms |
468 KB |
Output is correct |
| 19 |
Correct |
1 ms |
468 KB |
Output is correct |
| 20 |
Correct |
1 ms |
468 KB |
Output is correct |
| 21 |
Correct |
1 ms |
468 KB |
Output is correct |
| 22 |
Correct |
1 ms |
468 KB |
Output is correct |
| 23 |
Correct |
1 ms |
468 KB |
Output is correct |
| 24 |
Correct |
1 ms |
468 KB |
Output is correct |
| 25 |
Correct |
1 ms |
468 KB |
Output is correct |
| 26 |
Correct |
1 ms |
508 KB |
Output is correct |
| 27 |
Correct |
1 ms |
468 KB |
Output is correct |
| 28 |
Correct |
1 ms |
468 KB |
Output is correct |
| 29 |
Correct |
1 ms |
468 KB |
Output is correct |
| 30 |
Correct |
1 ms |
468 KB |
Output is correct |
| 31 |
Correct |
1 ms |
468 KB |
Output is correct |
| 32 |
Correct |
1 ms |
468 KB |
Output is correct |
| 33 |
Correct |
1 ms |
468 KB |
Output is correct |
| 34 |
Correct |
170 ms |
46440 KB |
Output is correct |
| 35 |
Correct |
174 ms |
45744 KB |
Output is correct |
| 36 |
Correct |
178 ms |
45012 KB |
Output is correct |
| 37 |
Correct |
172 ms |
45940 KB |
Output is correct |
| 38 |
Correct |
164 ms |
45920 KB |
Output is correct |
| 39 |
Correct |
152 ms |
46124 KB |
Output is correct |
| 40 |
Correct |
172 ms |
49096 KB |
Output is correct |
| 41 |
Correct |
154 ms |
46876 KB |
Output is correct |
| 42 |
Correct |
168 ms |
47788 KB |
Output is correct |
| 43 |
Correct |
183 ms |
49348 KB |
Output is correct |
| 44 |
Correct |
192 ms |
49476 KB |
Output is correct |
| 45 |
Correct |
182 ms |
49364 KB |
Output is correct |
| 46 |
Correct |
172 ms |
49384 KB |
Output is correct |
| 47 |
Correct |
165 ms |
49388 KB |
Output is correct |
| 48 |
Correct |
175 ms |
49380 KB |
Output is correct |
| 49 |
Correct |
177 ms |
49384 KB |
Output is correct |
| 50 |
Correct |
186 ms |
49380 KB |
Output is correct |
| 51 |
Correct |
177 ms |
49376 KB |
Output is correct |
| 52 |
Correct |
125 ms |
49384 KB |
Output is correct |
| 53 |
Correct |
126 ms |
49348 KB |
Output is correct |
| 54 |
Correct |
115 ms |
49380 KB |
Output is correct |
| 55 |
Correct |
118 ms |
49320 KB |
Output is correct |
| 56 |
Correct |
175 ms |
49376 KB |
Output is correct |
| 57 |
Correct |
143 ms |
49120 KB |
Output is correct |
| 58 |
Correct |
148 ms |
49384 KB |
Output is correct |
| 59 |
Correct |
142 ms |
49388 KB |
Output is correct |
| 60 |
Correct |
144 ms |
46316 KB |
Output is correct |
| 61 |
Correct |
147 ms |
49376 KB |
Output is correct |
| 62 |
Correct |
143 ms |
48636 KB |
Output is correct |
| 63 |
Correct |
145 ms |
49328 KB |
Output is correct |
| 64 |
Correct |
144 ms |
47624 KB |
Output is correct |
| 65 |
Correct |
143 ms |
49372 KB |
Output is correct |
