QOJ.ac
QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#71761 | #3275. 小明的树 | He_Ren | 100 ✓ | 2231ms | 40272kb | C++14 | 2.8kb | 2023-01-12 00:58:09 | 2023-01-12 00:58:20 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
const int MAXN = 5e5 + 5;
struct Data
{
int mn, cnt;
ll sum;
Data(void){}
Data(int _mn,int _cnt,ll _sum): mn(_mn), cnt(_cnt), sum(_sum) {}
inline void aply1(int k){ mn += k;}
inline void aply2(ll k){ sum += k * cnt;}
};
Data operator + (const Data &p,const Data &q)
{
if(p.mn < q.mn) return p;
if(p.mn > q.mn) return q;
return Data(p.mn, p.cnt + q.cnt, p.sum + q.sum);
}
struct Segment_Tree
{
Data f[MAXN<<2];
int tag1[MAXN<<2];
ll tag2[MAXN<<2];
#define ls(u) ((u)<<1)
#define rs(u) ((u)<<1|1)
#define lson(u) ls(u),l,mid
#define rson(u) rs(u),mid+1,r
inline void push_up(int u)
{
f[u] = f[ls(u)] + f[rs(u)];
}
inline void upd1(int u,int k){ tag1[u] += k; f[u].aply1(k);}
inline void upd2(int u,ll k){ tag2[u] += k; f[u].aply2(k);}
inline void push_down(int u)
{
if(tag1[u])
{
upd1(ls(u), tag1[u]); upd1(rs(u), tag1[u]);
tag1[u] = 0;
}
if(tag2[u])
{
upd2(ls(u), tag2[u]); upd2(rs(u), tag2[u]);
tag2[u] = 0;
}
}
void build(int u,int l,int r)
{
tag1[u] = tag2[u] = 0;
if(l == r){ f[u] = Data(0,1,0); return;}
int mid = (l+r)>>1;
build(lson(u)); build(rson(u));
push_up(u);
}
void add1(int u,int l,int r,int ql,int qr,int k)
{
if(ql<=l && r<=qr){ upd1(u,k); return;}
push_down(u);
int mid = (l+r)>>1;
if(ql<=mid) add1(lson(u),ql,qr,k);
if(mid<qr) add1(rson(u),ql,qr,k);
push_up(u);
}
void add2(int u,int l,int r,int ql,int qr,ll k)
{
if(ql<=l && r<=qr){ upd2(u,k); return;}
push_down(u);
int mid = (l+r)>>1;
if(ql<=mid) add2(lson(u),ql,qr,k);
if(mid<qr) add2(rson(u),ql,qr,k);
push_up(u);
}
int n;
inline void build(int _n){ n = _n; build(1,1,n);}
inline void add1(int ql,int qr,int k){ if(ql<=qr) add1(1,1,n,ql,qr,k);}
inline void add2(int ql,int qr,ll k){ if(ql<=qr) add2(1,1,n,ql,qr,k);}
}tree;
int p[MAXN], pos[MAXN];
pii es[MAXN];
int main(void)
{
int n,Q;
scanf("%d%d",&n,&Q);
for(int i=1; i<n; ++i) scanf("%d%d",&es[i].first,&es[i].second);
for(int i=1; i<n; ++i) scanf("%d",&p[i]);
p[n] = 1;
for(int i=1; i<=n; ++i)
pos[p[i]] = i;
tree.build(n-1);
for(int i=1; i<n; ++i)
tree.add1(i, i, n-i);
auto upd = [&] (int u,int v,int k)
{
if(pos[u] > pos[v]) swap(u, v);
tree.add1(1, pos[u]-1, -k);
tree.add2(pos[u], pos[v]-1, k);
};
auto query = [&] (void) -> ll
{
Data res = tree.f[1];
if(res.mn == 1) return res.sum;
else return 0;
};
for(int i=1; i<n; ++i) upd(es[i].first, es[i].second, 1);
printf("%lld\n",query());
while(Q--)
{
int u,v,uu,vv;
scanf("%d%d%d%d",&u,&v,&uu,&vv);
upd(u,v,-1); upd(uu,vv,1);
printf("%lld\n",query());
}
return 0;
}
详细
Subtask #1:
score: 10
Accepted
Test #1:
score: 10
Accepted
time: 706ms
memory: 40144kb
input:
500000 0 2 1 3 2 4 2 5 4 6 1 7 1 8 4 9 3 10 9 11 3 12 8 13 5 14 7 15 10 16 10 17 13 18 14 19 18 20 14 21 13 22 3 23 2 24 2 25 10 26 19 27 13 28 16 29 7 30 11 31 13 32 28 33 30 34 10 35 26 36 5 37 34 38 20 39 7 40 35 41 30 42 11 43 40 44 10 45 5 46 23 47 15 48 23 49 16 50 5 51 13 52 23 53 47 54 3 55 ...
output:
237
result:
ok 1 number(s): "237"
Subtask #2:
score: 20
Accepted
Test #2:
score: 20
Accepted
time: 13ms
memory: 8308kb
input:
8000 8000 2 1 3 2 4 1 5 4 6 3 7 4 8 3 9 3 10 8 11 6 12 7 13 11 14 11 15 7 16 4 17 11 18 7 19 8 20 19 21 18 22 17 23 2 24 15 25 23 26 13 27 10 28 1 29 7 30 17 31 11 32 18 33 2 34 1 35 29 36 5 37 21 38 6 39 7 40 26 41 19 42 3 43 9 44 39 45 23 46 41 47 38 48 12 49 4 50 30 51 1 52 41 53 17 54 41 55 53 5...
output:
16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 ...
result:
ok 8001 numbers
Test #3:
score: 0
Accepted
time: 18ms
memory: 8280kb
input:
8000 8000 2 1 3 2 4 3 5 1 6 1 7 2 8 6 9 7 10 5 11 8 12 1 13 3 14 9 15 7 16 11 17 15 18 17 19 16 20 8 21 9 22 16 23 8 24 17 25 23 26 11 27 22 28 16 29 11 30 14 31 27 32 23 33 24 34 7 35 26 36 10 37 35 38 7 39 21 40 7 41 11 42 32 43 11 44 17 45 9 46 4 47 5 48 24 49 25 50 15 51 32 52 41 53 28 54 34 55 ...
output:
12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 ...
result:
ok 8001 numbers
Subtask #3:
score: 70
Accepted
Dependency #1:
100%
Accepted
Dependency #2:
100%
Accepted
Test #4:
score: 70
Accepted
time: 2231ms
memory: 40092kb
input:
500000 500000 2 1 3 2 4 1 5 2 6 1 7 6 8 7 9 1 10 7 11 8 12 11 13 6 14 4 15 4 16 6 17 9 18 8 19 14 20 11 21 15 22 9 23 11 24 16 25 6 26 19 27 15 28 7 29 10 30 18 31 5 32 30 33 27 34 15 35 22 36 23 37 13 38 21 39 12 40 12 41 38 42 8 43 42 44 37 45 43 46 17 47 14 48 41 49 20 50 20 51 44 52 39 53 23 54 ...
output:
262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 262 ...
result:
ok 500001 numbers
Test #5:
score: 0
Accepted
time: 2060ms
memory: 40044kb
input:
500000 500000 2 1 3 1 4 2 5 3 6 2 7 3 8 1 9 3 10 2 11 8 12 6 13 8 14 7 15 12 16 8 17 11 18 10 19 12 20 12 21 7 22 6 23 16 24 1 25 21 26 13 27 8 28 19 29 3 30 26 31 27 32 21 33 21 34 23 35 16 36 28 37 31 38 3 39 17 40 9 41 8 42 37 43 15 44 40 45 8 46 44 47 31 48 46 49 27 50 17 51 9 52 13 53 29 54 6 5...
output:
415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 415 ...
result:
ok 500001 numbers
Test #6:
score: 0
Accepted
time: 2080ms
memory: 40112kb
input:
500000 500000 2 1 3 2 4 1 5 4 6 3 7 1 8 5 9 6 10 7 11 5 12 5 13 12 14 2 15 6 16 15 17 9 18 17 19 17 20 5 21 9 22 19 23 5 24 15 25 11 26 4 27 11 28 19 29 28 30 5 31 30 32 21 33 10 34 8 35 3 36 14 37 10 38 26 39 12 40 1 41 27 42 34 43 20 44 14 45 33 46 3 47 19 48 45 49 35 50 32 51 1 52 42 53 9 54 7 55...
output:
57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 ...
result:
ok 500001 numbers
Test #7:
score: 0
Accepted
time: 2050ms
memory: 40172kb
input:
500000 500000 2 1 3 2 4 3 5 1 6 5 7 6 8 3 9 6 10 8 11 2 12 4 13 4 14 9 15 10 16 5 17 10 18 11 19 8 20 18 21 18 22 5 23 4 24 7 25 10 26 21 27 25 28 8 29 2 30 20 31 28 32 16 33 32 34 20 35 34 36 3 37 9 38 25 39 21 40 35 41 13 42 20 43 3 44 34 45 2 46 17 47 8 48 12 49 17 50 17 51 49 52 15 53 48 54 27 5...
output:
198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 198 ...
result:
ok 500001 numbers
Test #8:
score: 0
Accepted
time: 2084ms
memory: 40272kb
input:
500000 500000 2 1 3 2 4 2 5 2 6 3 7 2 8 2 9 4 10 1 11 2 12 10 13 6 14 8 15 5 16 13 17 7 18 1 19 16 20 7 21 9 22 15 23 20 24 6 25 2 26 10 27 6 28 2 29 27 30 6 31 24 32 2 33 4 34 5 35 4 36 31 37 5 38 5 39 17 40 19 41 30 42 40 43 2 44 14 45 25 46 37 47 6 48 46 49 19 50 33 51 11 52 1 53 27 54 7 55 47 56...
output:
290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 290 ...
result:
ok 500001 numbers
Test #9:
score: 0
Accepted
time: 2117ms
memory: 40044kb
input:
500000 500000 2 1 3 1 4 2 5 1 6 5 7 5 8 1 9 8 10 5 11 8 12 4 13 9 14 11 15 10 16 11 17 7 18 17 19 12 20 17 21 9 22 9 23 8 24 21 25 17 26 13 27 5 28 10 29 18 30 4 31 19 32 6 33 18 34 10 35 12 36 19 37 13 38 5 39 10 40 33 41 16 42 18 43 20 44 26 45 19 46 1 47 15 48 17 49 48 50 43 51 40 52 29 53 45 54 ...
output:
40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 ...
result:
ok 500001 numbers
Test #10:
score: 0
Accepted
time: 2061ms
memory: 40128kb
input:
500000 500000 2 1 3 2 4 2 5 4 6 2 7 1 8 1 9 5 10 9 11 3 12 3 13 1 14 9 15 6 16 8 17 3 18 9 19 5 20 5 21 5 22 15 23 15 24 7 25 7 26 9 27 26 28 9 29 1 30 28 31 2 32 20 33 28 34 26 35 16 36 7 37 29 38 33 39 13 40 34 41 35 42 27 43 24 44 10 45 12 46 19 47 11 48 38 49 12 50 18 51 19 52 23 53 6 54 33 55 1...
output:
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 ...
result:
ok 500001 numbers