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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#488932 | #7956. Walk Swapping | arnold518 | WA | 173ms | 4160kb | C++17 | 3.3kb | 2024-07-24 16:25:34 | 2024-07-24 16:25:34 |
Judging History
answer
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int MAXN = 3000;
const int INF = 1e9;
const int MOD = 1e9+7;
const int P1 = 3001;
struct mint
{
int x;
mint() : x(0) {}
mint(int _x) : x(_x) {}
mint operator + (int ot) const { return x+ot>=MOD ? x+ot-MOD : x+ot; }
mint operator - (int ot) const { return x<ot ? x+MOD-ot : x-ot; }
mint operator - () const { return x ? MOD-x : 0; }
mint operator * (int ot) const { return 1ll*x*ot%MOD; }
mint operator += (int ot) { return *this = *this + ot; }
mint operator -= (int ot) { return *this = *this - ot; }
mint operator *= (int ot) { return *this = *this * ot; }
operator int() const { return x; }
bool operator < (int ot) const { return x<ot; }
};
mint mpow(mint a, ll b)
{
mint ret=1;
while(b)
{
if(b&1) ret*=a;
b>>=1; a=a*a;
}
return ret;
}
mint inv(mint a) { return mpow(a, MOD-2); }
int N, A[MAXN+10], B[MAXN+10];
mint PP[MAXN+10], IP[MAXN+10];
mint HA[MAXN+10], HB[MAXN+10];
int ans=INF;
int main()
{
ios_base::sync_with_stdio(false); cin.tie(NULL);
scanf("%d", &N);
for(int i=1; i<=N; i++) scanf("%d", &A[i]);
for(int i=1; i<=N; i++) scanf("%d", &B[i]);
{
vector<int> VA, VB;
for(int i=1; i<=N; i++) VA.push_back(A[i]);
for(int i=1; i<=N; i++) VB.push_back(B[i]);
sort(VA.begin(), VA.end());
sort(VB.begin(), VB.end());
if(VA!=VB) return !printf("-1\n");
}
if(N==1) return !printf("0\n");
PP[0]=1; IP[0]=1;
PP[1]=P1; IP[1]=inv(PP[1]);
for(int i=2; i<=N; i++) PP[i]=PP[i-1]*PP[1];
for(int i=2; i<=N; i++) IP[i]=IP[i-1]*IP[1];
for(int cyc=0; cyc<N; cyc++)
{
vector<pii> V, V2, V3;
for(int i=1; i<=N; i++) HA[i]=HA[i-1]+PP[i]*A[i];
for(int i=1; i<=N; i++) HB[i]=HB[i-1]+PP[i]*B[i];
for(int i=1; i<=N; i++) V.push_back({HB[i-1]+(HB[N]-HB[i])*IP[1], i});
for(int i=2; i<=N; i++) V2.push_back({(HA[N]-HA[i-1])*IP[i-1] + (HA[i-1]-HA[1])*PP[N-i], i});
for(int i=1; i<N; i++) V3.push_back({(HA[N-1]-HA[i-1])*IP[i-1] + HA[i-1]*PP[N-i], i});
sort(V.begin(), V.end());
sort(V2.begin(), V2.end());
sort(V3.begin(), V3.end());
for(int l=0, r, j=0; l<V2.size(); l=r)
{
for(r=l; r<V2.size() && V2[r].first==V2[l].first; r++);
int val=INF;
for(; j<V.size() && V[j].first<=V2[l].first; j++) if(V[j].first==V2[l].first) val=min(val, V[j].second);
if(val!=INF) for(int i=l; i<r; i++) ans=min(ans, (V2[i].second-2)*N+val-1);
}
for(int l=0, r, j=0; l<V3.size(); l=r)
{
for(r=l; r<V3.size() && V3[r].first==V3[l].first; r++);
int val=0;
for(; j<V.size() && V[j].first<=V3[l].first; j++) if(V[j].first==V3[l].first) val=max(val, V[j].second);
if(val!=0) for(int i=l; i<r; i++) ans=min(ans, (N-V3[i].second)%(N-1)*N+N-val);
}
rotate(A+1, A+2, A+N+1);
rotate(B+1, B+2, B+N+1);
}
if(ans==INF) printf("-1\n");
else printf("%d\n", ans);
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 4148kb
input:
4 4 3 2 1 3 4 2 1
output:
1
result:
ok single line: '1'
Test #2:
score: 0
Accepted
time: 1ms
memory: 3856kb
input:
6 2 1 1 2 2 1 1 2 2 2 1 1
output:
7
result:
ok single line: '7'
Test #3:
score: 0
Accepted
time: 0ms
memory: 3856kb
input:
6 4 1 3 6 2 5 6 2 1 3 4 5
output:
-1
result:
ok single line: '-1'
Test #4:
score: 0
Accepted
time: 0ms
memory: 3948kb
input:
4 1 2 3 4 4 2 1 3
output:
2
result:
ok single line: '2'
Test #5:
score: 0
Accepted
time: 0ms
memory: 4148kb
input:
6 4 1 3 6 2 5 6 2 5 3 4 1
output:
13
result:
ok single line: '13'
Test #6:
score: 0
Accepted
time: 0ms
memory: 4156kb
input:
6 4 1 3 3 2 5 3 2 5 3 4 1
output:
12
result:
ok single line: '12'
Test #7:
score: 0
Accepted
time: 0ms
memory: 4108kb
input:
4 4 3 2 1 1 3 2 4
output:
1
result:
ok single line: '1'
Test #8:
score: 0
Accepted
time: 0ms
memory: 4156kb
input:
5 4 3 5 2 1 1 3 5 4 2
output:
2
result:
ok single line: '2'
Test #9:
score: 0
Accepted
time: 0ms
memory: 3952kb
input:
5 4 3 5 2 1 1 4 3 5 2
output:
4
result:
ok single line: '4'
Test #10:
score: 0
Accepted
time: 0ms
memory: 4116kb
input:
5 1 1 1 2 1 2 1 1 1 1
output:
2
result:
ok single line: '2'
Test #11:
score: 0
Accepted
time: 0ms
memory: 3860kb
input:
4 4 3 2 1 1 3 2 4
output:
1
result:
ok single line: '1'
Test #12:
score: 0
Accepted
time: 0ms
memory: 3876kb
input:
4 4 3 2 1 1 3 4 2
output:
2
result:
ok single line: '2'
Test #13:
score: 0
Accepted
time: 0ms
memory: 4044kb
input:
10 2 3 1 1 3 4 5 5 6 1 1 1 3 4 5 3 5 1 7 2
output:
-1
result:
ok single line: '-1'
Test #14:
score: 0
Accepted
time: 0ms
memory: 4112kb
input:
5 1 4 5 3 2 5 3 2 1 4
output:
8
result:
ok single line: '8'
Test #15:
score: 0
Accepted
time: 0ms
memory: 3952kb
input:
5 1 2 3 4 5 5 2 1 3 4
output:
3
result:
ok single line: '3'
Test #16:
score: 0
Accepted
time: 0ms
memory: 3796kb
input:
10 1 2 3 4 5 6 7 8 9 10 8 4 2 3 1 5 7 6 9 10
output:
-1
result:
ok single line: '-1'
Test #17:
score: 0
Accepted
time: 0ms
memory: 4156kb
input:
10 1 2 3 2 2 2 1 1 1 1 2 1 1 1 1 1 2 2 3 2
output:
41
result:
ok single line: '41'
Test #18:
score: 0
Accepted
time: 0ms
memory: 4116kb
input:
10 1 1 1 2 2 4 4 4 2 2 1 1 2 2 4 4 2 2 1 4
output:
12
result:
ok single line: '12'
Test #19:
score: 0
Accepted
time: 0ms
memory: 3864kb
input:
12 3 3 3 2 2 2 4 4 2 2 1 3 3 3 2 2 4 4 2 2 2 1 3 3
output:
13
result:
ok single line: '13'
Test #20:
score: 0
Accepted
time: 0ms
memory: 3812kb
input:
12 3 3 2 2 2 2 4 4 2 2 1 2 2 2 2 2 4 4 2 2 2 1 3 3
output:
19
result:
ok single line: '19'
Test #21:
score: 0
Accepted
time: 0ms
memory: 4100kb
input:
12 3 3 2 4 2 2 4 4 2 2 1 2 2 2 2 2 4 4 2 2 4 1 3 3
output:
-1
result:
ok single line: '-1'
Test #22:
score: 0
Accepted
time: 0ms
memory: 3856kb
input:
20 3 4 4 5 1 2 3 2 5 1 1 5 3 2 4 5 1 2 3 5 2 3 5 4 4 5 1 2 3 2 5 3 1 1 5 3 2 4 5 1
output:
49
result:
ok single line: '49'
Test #23:
score: 0
Accepted
time: 0ms
memory: 3880kb
input:
20 3 4 4 5 1 2 3 2 5 1 1 5 3 2 4 5 1 2 3 5 3 2 3 4 5 1 2 3 5 4 4 5 1 2 3 2 5 1 1 5
output:
158
result:
ok single line: '158'
Test #24:
score: 0
Accepted
time: 2ms
memory: 3916kb
input:
100 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 99 1...
output:
109
result:
ok single line: '109'
Test #25:
score: 0
Accepted
time: 2ms
memory: 4144kb
input:
100 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 99 100 100 ...
output:
89
result:
ok single line: '89'
Test #26:
score: 0
Accepted
time: 2ms
memory: 4160kb
input:
100 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 51 5...
output:
4924
result:
ok single line: '4924'
Test #27:
score: 0
Accepted
time: 2ms
memory: 3864kb
input:
100 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 51 5...
output:
4905
result:
ok single line: '4905'
Test #28:
score: 0
Accepted
time: 0ms
memory: 4116kb
input:
100 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 6 6 6 6 6 7 7 7 7 7 8 8 8 8 8 9 9 9 9 9 10 10 10 10 10 11 11 11 11 11 12 12 12 12 12 13 13 13 13 13 14 14 14 14 14 15 15 15 15 15 16 16 16 16 16 17 17 17 17 17 18 18 18 18 18 19 19 19 19 19 20 20 20 20 20 9 9 9 9 9 10 10 10 10 10 11 11 11 11 11 1...
output:
3990
result:
ok single line: '3990'
Test #29:
score: 0
Accepted
time: 2ms
memory: 3884kb
input:
100 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 ...
output:
125
result:
ok single line: '125'
Test #30:
score: 0
Accepted
time: 0ms
memory: 4080kb
input:
100 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 6 6 6 6 6 7 7 7 7 7 8 8 8 8 8 9 9 9 9 9 10 10 10 10 10 11 11 11 11 11 12 12 12 12 12 13 13 13 13 13 14 14 14 14 14 15 15 15 15 15 16 16 16 16 16 17 17 17 17 17 18 18 18 18 18 19 19 19 19 19 20 20 20 20 20 9 9 9 9 9 10 10 10 10 10 11 11 11 15 11 1...
output:
-1
result:
ok single line: '-1'
Test #31:
score: 0
Accepted
time: 0ms
memory: 3860kb
input:
100 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 ...
output:
79
result:
ok single line: '79'
Test #32:
score: 0
Accepted
time: 2ms
memory: 3816kb
input:
100 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 ...
output:
-1
result:
ok single line: '-1'
Test #33:
score: 0
Accepted
time: 2ms
memory: 3956kb
input:
100 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 ...
output:
0
result:
ok single line: '0'
Test #34:
score: 0
Accepted
time: 173ms
memory: 3892kb
input:
1000 458 51 4 190 103 444 401 456 34 970 169 517 283 66 571 282 233 161 32 376 168 616 993 347 213 597 334 652 471 532 552 987 353 613 665 305 477 632 331 293 939 598 175 813 10 890 423 560 502 857 277 18 283 461 6 231 233 648 929 75 896 807 900 2 582 84 81 107 255 145 909 562 492 58 218 575 7 610 6...
output:
243210
result:
ok single line: '243210'
Test #35:
score: -100
Wrong Answer
time: 173ms
memory: 3920kb
input:
1000 323 302 194 991 814 729 763 611 294 128 752 772 136 693 300 575 118 965 888 999 288 837 534 470 436 195 8 958 448 216 697 295 53 341 577 460 543 724 79 593 490 800 218 336 7 448 401 716 7 920 740 21 87 208 202 422 812 528 196 475 633 732 170 423 975 901 412 117 829 457 420 941 664 644 858 473 9...
output:
180807
result:
wrong answer 1st lines differ - expected: '243013', found: '180807'