QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #127285 | #5409. Perotation | 1kri | 30 | 4ms | 24392kb | C++14 | 2.7kb | 2023-07-19 15:14:48 | 2023-07-19 15:14:50 |
Judging History
answer
#include <iostream>
#include <cstdio>
#include <algorithm>
using namespace std;
int n,q,a[100005],x,y;
struct BIT{
int tree[100005];
void add(int p,int v){
while(p<=n)tree[p]+=v,p+=(p&(-p));
return;
}
int ask(int p){
int ans=0;
while(p)ans+=tree[p],p-=(p&(-p));
return ans;
}
}T[325],_T;
const int B=2;
int B_tot,B_pos[1005],B_id[100005];
int f[100005],_f[100005];
int len[325],val[325][325],ch[325][325];
int cnt[325];
void pushup(int id){
int l=B_pos[id],r=B_pos[id-1]-1;
len[id]=0;
for (int i=r;i>=l;i--){
f[i]=((T[id-1].ask(a[i])+_T.ask(a[i]))&1);
_T.add(a[i],1);
}
for (int i=r;i>=l;i--)_T.add(a[i],-1);
for (int i=l;i<=r;i++){
val[id][++len[id]]=a[i];
_f[a[i]]=f[i];
}
sort(val[id],val[id]+1+len[id]);
cnt[id]=0;
for (int i=1;i<=len[id];i++){
ch[id][i]=(_f[val[id][i]]^_f[val[id][i-1]]);
if (ch[id][i]==1)cnt[id]++;
}
for (int i=l;i<=r;i++)_f[a[i]]=0;
return;
}
void pushdown(int id){
int l=B_pos[id],r=B_pos[id-1]-1;
for (int i=1;i<=len[id];i++)_f[val[id][i]]=(_f[val[id][i-1]]^ch[id][i]);
for (int i=l;i<=r;i++)f[i]=_f[a[i]];
for (int i=1;i<=len[id];i++)_f[val[id][i]]=0;
return;
}
int ge(int id,int x){
int l=1,r=len[id],ans=len[id]+1;
while(l<=r){
int mid=(l+r)/2;
if (val[id][mid]>=x)ans=mid,r=mid-1;
else l=mid+1;
}
return ans;
}
int le(int id,int x){
int l=1,r=len[id],ans=0;
while(l<=r){
int mid=(l+r)/2;
if (val[id][mid]<=x)ans=mid,l=mid+1;
else r=mid-1;
}
return ans;
}
void mdf(int id,int l,int r){
int pl=ge(id,l),pr=le(id,r);
if (pl<=len[id]&&pr>=1){
if (ch[id][pl]==1)cnt[id]--;
ch[id][pl]^=1;
if (ch[id][pl]==1)cnt[id]++;
if (pr<len[id]){
if (ch[id][pr+1]==1)cnt[id]--;
ch[id][pr+1]^=1;
if (ch[id][pr+1]==1)cnt[id]++;
}
}
return;
}
int main(){
scanf("%d%d",&n,&q);
for (int i=1;i<=n;i++)scanf("%d",&a[i]);
B_pos[0]=n+1;
for (int i=n;i>=1;i--)
if (i==1||(n-i+1)%B==0)B_pos[++B_tot]=i;
for (int i=1;i<=B_tot;i++)
for (int j=B_pos[i];j<B_pos[i-1];j++)B_id[j]=i;
for (int i=1;i<=B_tot;i++){
int p=B_pos[i];
for (int j=n;j>=p;j--)T[i].add(a[j],1);
}
for (int i=1;i<=B_tot;i++)pushup(i);
while(q--){
scanf("%d%d",&x,&y);
if (x>y)swap(x,y);
int l=a[x],r=a[y];
if (l>r)swap(l,r);
swap(a[x],a[y]);
for (int i=1;i<=B_tot;i++){
int p=B_pos[i];
if (p>x&&p<=y)T[i].add(a[y],-1),T[i].add(a[x],1);
}
for (int i=B_id[y]+1;i<=B_id[x]-1;i++)mdf(i,l,r);
pushup(B_id[x]);
if (B_id[x]!=B_id[y])pushup(B_id[y]);
int ans=n+1;
for (int i=1;i<=B_tot;i++){
if (cnt[i]>0)break;
ans=B_pos[i];
}
if (ans>1)pushdown(B_id[ans]+1);
while(ans>1&&f[ans-1]==0)ans--;
printf("%d\n",ans);
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Subtask #1:
score: 10
Accepted
Test #1:
score: 10
Accepted
time: 0ms
memory: 3700kb
input:
2 1 1 2 2 1
output:
2
result:
ok 1 number(s): "2"
Test #2:
score: 0
Accepted
time: 1ms
memory: 5772kb
input:
9 7 3 5 8 2 4 9 1 6 7 2 8 3 1 2 1 1 5 3 8 1 3 9 1
output:
7 7 7 7 7 7 7
result:
ok 7 numbers
Test #3:
score: 0
Accepted
time: 1ms
memory: 5712kb
input:
7 7 6 7 2 1 5 3 4 3 1 3 1 7 5 1 6 6 5 6 1 1 7
output:
3 4 6 7 4 4 4
result:
ok 7 numbers
Test #4:
score: 0
Accepted
time: 1ms
memory: 7744kb
input:
7 7 2 4 3 1 5 6 7 7 6 6 3 3 1 1 4 3 4 2 5 4 1
output:
7 6 6 6 6 6 6
result:
ok 7 numbers
Test #5:
score: 0
Accepted
time: 1ms
memory: 5952kb
input:
6 6 5 3 1 4 2 6 5 4 5 2 4 3 6 5 1 5 6 4
output:
1 3 4 6 6 6
result:
ok 6 numbers
Test #6:
score: 0
Accepted
time: 1ms
memory: 5720kb
input:
10 9 7 9 2 5 1 6 8 3 4 10 4 5 2 9 10 6 6 1 5 3 10 1 5 7 1 7 8 3
output:
4 8 10 10 10 8 6 8 8
result:
ok 9 numbers
Test #7:
score: 0
Accepted
time: 1ms
memory: 5780kb
input:
8 8 4 2 6 5 8 3 7 1 5 6 2 4 6 5 6 1 4 6 1 2 2 8 8 6
output:
8 8 8 8 8 8 8 8
result:
ok 8 numbers
Test #8:
score: 0
Accepted
time: 1ms
memory: 7788kb
input:
8 8 6 8 4 7 1 3 5 2 1 4 3 8 3 8 8 3 6 2 1 5 1 6 7 4
output:
8 8 8 8 8 8 8 8
result:
ok 8 numbers
Test #9:
score: 0
Accepted
time: 1ms
memory: 5960kb
input:
6 8 6 1 2 5 3 4 6 1 4 5 2 5 5 3 4 6 4 1 2 4 4 2
output:
5 2 5 5 3 2 3 2
result:
ok 8 numbers
Test #10:
score: 0
Accepted
time: 2ms
memory: 7756kb
input:
10 7 3 1 8 7 6 2 9 5 10 4 7 3 10 7 1 3 2 1 8 10 8 3 1 2
output:
10 10 10 10 10 10 10
result:
ok 7 numbers
Test #11:
score: 0
Accepted
time: 1ms
memory: 5712kb
input:
8 7 3 1 4 2 7 5 8 6 6 5 6 5 2 3 5 1 4 8 7 2 5 1
output:
8 8 8 8 8 8 8
result:
ok 7 numbers
Subtask #2:
score: 20
Accepted
Dependency #1:
100%
Accepted
Test #12:
score: 20
Accepted
time: 4ms
memory: 22316kb
input:
90 83 53 72 1 6 48 45 55 24 20 78 36 82 67 35 63 7 61 69 90 52 21 80 65 32 71 81 38 43 34 64 60 40 4 49 28 89 56 77 51 46 2 18 5 62 19 57 3 88 39 85 86 23 75 10 83 27 22 68 9 37 76 50 87 79 16 11 25 26 14 8 74 41 66 58 84 12 54 17 33 42 15 44 13 73 30 29 70 59 47 31 76 86 30 50 85 3 23 51 42 59 37 8...
output:
90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 89 89 89 89 89 89 89 89 89 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88 88
result:
ok 83 numbers
Test #13:
score: 0
Accepted
time: 0ms
memory: 20276kb
input:
87 95 69 48 22 37 65 67 72 78 59 85 74 26 25 28 53 51 23 56 50 52 81 76 57 30 10 49 21 87 34 16 15 80 43 47 2 20 86 13 29 36 58 71 83 35 40 46 38 54 14 18 84 39 27 3 61 77 64 8 6 68 11 31 7 73 1 9 4 79 55 63 82 75 33 32 24 5 19 45 41 60 44 66 70 17 42 62 12 53 8 8 34 49 54 16 33 64 78 11 2 73 85 51 ...
output:
87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 85 85 85 85 85 85 85 85 85 85 83 83 83 83 83 83 83 83 83 83 83 83 85 85 85 85 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87 87
result:
ok 95 numbers
Test #14:
score: 0
Accepted
time: 0ms
memory: 20172kb
input:
87 90 19 70 69 56 20 16 66 9 21 47 81 5 50 7 24 85 1 80 4 73 37 52 12 75 64 3 57 71 77 28 40 17 82 65 45 22 6 79 87 63 27 39 42 83 38 11 14 41 31 74 15 60 62 86 34 23 49 33 68 51 61 32 67 59 35 58 30 29 36 25 48 84 13 54 10 53 46 78 76 26 43 72 2 8 18 44 55 58 62 14 17 36 78 11 20 35 15 85 21 74 64 ...
output:
83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 86 84 84 84 84 84 84 84 84 84 84 84 84 84 84 86 86 86 86 86 86
result:
ok 90 numbers
Test #15:
score: 0
Accepted
time: 0ms
memory: 24268kb
input:
91 71 40 81 83 16 76 5 85 64 84 82 63 42 32 71 73 3 51 11 30 65 17 20 56 31 4 54 49 38 52 86 34 48 80 6 26 87 8 25 36 23 2 7 70 62 67 88 72 47 55 77 29 66 68 69 91 37 79 22 44 61 45 41 74 89 28 15 13 39 75 14 46 21 33 35 43 18 58 53 90 57 19 10 12 50 59 60 1 9 24 27 78 44 18 42 5 41 26 41 29 40 1 38...
output:
45 45 45 45 45 45 45 45 45 45 45 45 45 73 74 73 72 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80
result:
ok 71 numbers
Test #16:
score: 0
Accepted
time: 1ms
memory: 20168kb
input:
80 66 26 54 23 35 62 1 25 56 12 48 37 8 80 7 32 40 52 78 69 6 29 10 36 50 16 42 61 60 27 38 14 77 17 9 20 59 64 79 5 76 67 39 18 34 13 71 15 70 66 19 24 63 72 53 2 75 65 51 22 44 73 28 11 3 57 33 30 74 46 55 31 41 43 68 4 47 49 58 21 45 39 1 37 18 35 6 32 3 31 21 31 27 31 46 46 55 54 6 51 19 51 45 5...
output:
40 40 40 40 40 40 47 55 55 55 55 55 55 55 55 55 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 72 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 72 72 70
result:
ok 66 numbers
Test #17:
score: 0
Accepted
time: 1ms
memory: 24284kb
input:
100 100 15 10 37 71 30 22 78 12 33 13 29 26 27 11 3 24 42 18 21 28 73 23 53 57 91 32 20 6 4 5 82 16 95 80 14 17 76 25 9 8 31 7 99 19 96 49 59 2 65 93 70 58 60 43 44 50 74 92 35 86 98 84 90 52 67 72 83 62 56 100 46 89 69 36 45 38 77 61 81 63 41 55 87 79 39 88 54 85 64 75 48 97 68 94 40 66 1 51 34 47 ...
output:
68 64 68 68 68 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 85 90 90 90 90 90 90 90 90 90 90 90 90
result:
ok 100 numbers
Test #18:
score: 0
Accepted
time: 4ms
memory: 22472kb
input:
94 100 85 86 55 56 3 4 67 68 61 62 77 78 65 66 89 90 73 74 45 46 11 12 49 50 37 38 51 52 43 44 83 84 41 42 31 32 5 6 25 26 7 8 79 80 1 2 47 48 91 92 35 36 23 24 29 30 93 94 17 18 15 16 71 72 53 54 27 28 21 22 75 76 19 20 63 64 57 58 39 40 59 60 69 70 33 34 13 14 81 82 87 88 9 10 56 78 86 68 55 77 85...
output:
78 86 86 1 23 31 23 1 18 1 53 1 90 1 91 1 29 1 55 77 77 77 18 1 85 85 85 1 26 1 54 87 87 1 66 1 73 1 50 82 82 1 80 84 80 1 78 88 94 88 78 1 91 1 79 79 79 1 49 1 65 1 44 1 27 77 27 1 60 60 47 1 92 1 75 1 74 1 57 94 94 87 57 1 68 68 81 81 81 1 47 53 53 1 34 1 33 65 33 1
result:
ok 100 numbers
Test #19:
score: 0
Accepted
time: 1ms
memory: 24372kb
input:
100 100 43 44 77 78 75 76 99 100 1 2 5 6 19 20 89 90 47 48 41 42 65 66 67 68 25 26 91 92 95 96 71 72 97 98 49 50 23 24 17 18 81 82 55 56 45 46 27 28 21 22 29 30 15 16 51 52 11 12 31 32 61 62 87 88 57 58 35 36 73 74 9 10 59 60 7 8 85 86 83 84 33 34 39 40 53 54 37 38 69 70 13 14 93 94 79 80 63 64 3 4 ...
output:
96 96 96 1 36 1 56 1 88 1 81 1 68 1 37 1 90 1 28 1 98 98 98 1 55 86 86 1 93 1 84 84 69 69 65 1 99 1 55 1 61 61 42 1 88 1 30 1 38 1 49 49 44 1 96 96 85 85 85 1 50 1 60 60 60 1 45 45 26 1 27 1 42 78 78 1 53 53 100 100 100 1 94 94 64 88 88 1 87 96 96 1 98 98 98 97 97 1 83 1
result:
ok 100 numbers
Test #20:
score: 0
Accepted
time: 0ms
memory: 20192kb
input:
84 83 55 56 13 14 69 70 79 80 3 4 49 50 9 10 27 28 29 30 59 60 73 74 1 2 11 12 77 78 51 52 45 46 15 16 17 18 33 34 31 32 25 26 53 54 43 44 63 64 41 42 39 40 19 20 37 38 81 82 75 76 83 84 23 24 47 48 61 62 5 6 7 8 35 36 21 22 65 66 57 58 71 72 67 68 12 32 11 31 62 82 22 48 21 47 78 72 77 71 68 52 61 ...
output:
13 1 63 63 63 78 63 68 68 1 33 23 33 1 48 1 63 1 33 1 60 1 40 51 80 80 80 1 75 61 74 1 58 1 72 1 31 51 31 1 62 1 39 73 73 79 79 1 67 1 74 75 74 74 74 76 76 1 39 1 4 1 82 82 76 76 76 1 22 23 23 1 78 1 52 1 47 57 57 1 75 1 59
result:
ok 83 numbers
Test #21:
score: 0
Accepted
time: 1ms
memory: 24260kb
input:
100 100 79 80 63 64 23 24 41 42 87 88 33 34 99 100 65 66 73 74 11 12 69 70 71 72 19 20 59 60 75 76 35 36 15 16 3 4 67 68 17 18 93 94 39 40 9 10 81 82 13 14 89 90 49 50 31 32 43 44 97 98 95 96 77 78 57 58 55 56 29 30 51 52 61 62 27 28 53 54 47 48 25 26 91 92 5 6 83 84 7 8 37 38 45 46 1 2 21 22 85 86 ...
output:
75 1 33 1 59 1 80 98 98 98 98 98 17 1 80 80 80 80 80 80 80 89 89 1 75 75 75 54 74 74 54 1 48 1 87 87 84 88 88 1 62 1 61 1 95 1 86 86 86 86 30 1 47 1 86 86 39 1 83 1 10 1 90 90 90 1 26 1 41 66 66 1 67 1 94 1 46 1 71 71 70 1 82 1 96 96 96 1 14 68 68 68 40 1 79 79 79 1 48 1
result:
ok 100 numbers
Test #22:
score: 0
Accepted
time: 0ms
memory: 22252kb
input:
95 82 65 66 53 54 1 2 83 84 19 20 43 44 89 90 5 6 11 12 67 68 55 56 87 88 77 78 17 18 7 8 49 50 9 10 57 58 79 80 71 72 23 24 81 82 93 94 3 4 39 40 13 14 21 22 59 60 25 26 91 92 63 64 15 16 69 70 47 48 61 62 41 42 33 34 31 32 27 28 35 36 45 46 73 74 37 38 29 30 51 52 85 86 75 76 95 74 62 73 61 8 50 7...
output:
73 1 45 1 72 1 11 92 92 92 92 87 87 87 87 87 87 87 87 87 27 1 88 1 82 82 82 82 82 69 84 84 84 84 84 68 68 1 78 78 78 92 92 92 92 92 92 92 92 92 81 81 68 1 43 43 43 1 77 77 39 1 71 71 71 71 60 60 94 60 60 1 73 1 33 52 52 46 33 1 70 1
result:
ok 82 numbers
Test #23:
score: 0
Accepted
time: 1ms
memory: 24392kb
input:
100 100 55 56 49 50 81 82 37 38 51 52 35 36 89 90 57 58 7 8 27 28 99 100 65 66 5 6 87 88 83 84 53 54 91 92 77 78 13 14 29 30 41 42 9 10 45 46 63 64 93 94 59 60 23 24 1 2 3 4 97 98 69 70 85 86 21 22 25 26 31 32 11 12 39 40 95 96 19 20 73 74 79 80 47 48 71 72 43 44 15 16 67 68 61 62 75 76 17 18 33 34 ...
output:
47 55 69 55 55 64 64 64 64 64 84 84 84 84 84 1 96 96 96 96 72 1 31 89 91 91 31 38 38 55 38 94 38 1 26 26 96 96 96 96 96 96 96 96 96 96 90 90 90 1 65 92 92 92 92 92 92 92 92 92 92 92 27 1 68 68 57 66 73 73 57 57 62 62 62 62 62 89 89 97 97 1 78 1 57 91 91 59 91 91 82 1 86 1 69 1 75 1 46 1
result:
ok 100 numbers
Test #24:
score: 0
Accepted
time: 1ms
memory: 22480kb
input:
100 100 53 54 83 84 29 30 95 96 11 12 45 46 91 92 17 18 5 6 39 40 87 88 57 58 93 94 81 82 67 68 85 86 59 60 73 74 71 72 99 100 19 20 31 32 65 66 23 24 43 44 25 26 1 2 9 10 61 62 7 8 35 36 89 90 69 70 37 38 51 52 79 80 63 64 55 56 47 48 3 4 13 14 49 50 97 98 27 28 41 42 33 34 21 22 75 76 15 16 77 78 ...
output:
97 1 39 1 80 1 27 1 25 1 7 1 79 1 60 1 63 1 84 1 60 1 27 1 78 1 33 1 44 1 41 1 90 1 69 1 94 1 99 1 92 1 59 1 59 1 87 1 83 1 63 1 82 1 94 1 25 1 91 1 83 1 50 1 77 1 71 1 46 1 89 1 18 1 36 1 51 1 14 1 48 1 76 1 7 1 42 1 57 1 17 1 68 1 98 1 52 1 49 1
result:
ok 100 numbers
Test #25:
score: 0
Accepted
time: 1ms
memory: 24308kb
input:
100 100 3 4 63 64 21 22 49 50 35 36 99 100 65 66 85 86 25 26 17 18 23 24 69 70 33 34 13 14 41 42 81 82 11 12 67 68 57 58 29 30 15 16 1 2 55 56 31 32 83 84 37 38 91 92 45 46 43 44 79 80 93 94 9 10 73 74 95 96 61 62 39 40 7 8 53 54 87 88 5 6 59 60 47 48 75 76 89 90 27 28 19 20 71 72 97 98 51 52 77 78 ...
output:
7 7 7 7 7 7 10 10 10 10 46 46 99 46 89 46 77 46 100 46 92 46 82 46 46 46 59 66 99 66 100 66 66 66 83 66 66 66 65 66 95 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 99 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 100 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96
result:
ok 100 numbers
Test #26:
score: 0
Accepted
time: 4ms
memory: 22356kb
input:
100 100 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 ...
output:
100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1 100 1
result:
ok 100 numbers
Subtask #3:
score: 0
Runtime Error
Dependency #1:
100%
Accepted
Dependency #2:
100%
Accepted
Test #27:
score: 0
Runtime Error
input:
3695 3785 270 3225 1936 1747 2487 1557 2343 3313 2544 1941 1095 1919 3206 901 327 3076 557 29 112 2617 201 53 2643 678 1666 680 1523 3380 1353 2059 2566 1743 523 1131 168 509 2138 3577 109 2930 1114 3563 3395 2075 2271 1228 3462 1952 1535 1087 2548 653 2713 1749 336 1658 2470 466 958 639 3184 2451 1...
output:
result:
Subtask #4:
score: 0
Skipped
Dependency #1:
100%
Accepted
Dependency #2:
100%
Accepted
Dependency #3:
0%