//雪花飄飄北風嘯嘯
//天地一片蒼茫
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ii,ll>
#define fi first
#define se second
#define endl '\n'
#define debug(x) cout << #x << " is " << x << endl;
#define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()
ll MAX(ll a){return a;}
ll MIN(ll a){return a;}
template<typename... Args>
ll MAX(ll a,Args... args){return max(a,MAX(args...));}
template<typename... Args>
ll MIN(ll a,Args... args){return min(a,MIN(args...));}
#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
struct node{
int s,e,m;
ii val;
ll lazy=0;
node *l,*r;
node (int _s,int _e){
s=_s,e=_e,m=s+e>>1;
val=ii(0,s);
if (s!=e){
l=new node(s,m);
r=new node(m+1,e);
}
}
void propo(){
if (lazy){
val.fi+=lazy;
if (s!=e){
l->lazy+=lazy;
r->lazy+=lazy;
}
lazy=0;
}
}
void update(int i,int j,ll k){
if (s==i && e==j) lazy+=k;
else{
if (j<=m) l->update(i,j,k);
else if (m<i) r->update(i,j,k);
else l->update(i,m,k),r->update(m+1,j,k);
l->propo(),r->propo();
val=max(l->val,r->val);
}
}
ii query(int i,int j){
propo();
if (s==i && e==j) return val;
else if (j<=m) return l->query(i,j);
else if (m<i) return r->query(i,j);
else return max(l->query(i,m),r->query(m+1,j));
}
};
struct mxnode{
int s,e,m;
ll val=0;
mxnode *l,*r;
mxnode (int _s,int _e){
s=_s,e=_e,m=s+e>>1;
if (s!=e){
l=new mxnode(s,m);
r=new mxnode(m+1,e);
}
}
void update(int i,ll j){
if (s==e) val=j;
else{
if (i<=m) l->update(i,j);
else r->update(i,j);
val=max(l->val,r->val);
}
}
} *mxroot=new mxnode(0,100005);
ll n,q,w;
vector<ii> al[100005];
bool used[100005];
int ss[100005];
void dfs_c(int i,int p){
ss[i]=1;
for (auto &it:al[i]){
if (it.fi==p || used[it.fi]) continue;
dfs_c(it.fi,i);
ss[i]+=ss[it.fi];
}
}
ll cw[100005];
vector<ii> range[100005];
vector<ii> subtree[100005];
vector<ii> pos[100005];
node* root[100005];
bool degen[100005];
int TIME;
ii dfs(int i,int p,int root){
ii r=ii(1e9,-1e9);
for (auto &it:al[i]){
if (it.fi==p || used[it.fi]) continue;
auto temp=dfs(it.fi,i,root);
if (i==root){
rep(x,temp.fi,temp.se+1) subtree[root].push_back(temp);
}
pos[it.se].push_back(ii(root,sz(range[root])));
range[root].push_back(temp);
r.fi=min(r.fi,temp.fi);
r.se=max(r.se,temp.se);
}
if (r==ii(1e9,-1e9)){
r=ii(TIME,TIME);
TIME++;
}
return r;
}
void centroid(int i,int sz){
//cout<<i<<" "<<sz<<endl;
dfs_c(i,-1);
int p=-1;
reloop:
for (auto &it:al[i]){
if (it.fi==p || used[it.fi]) continue;
if (ss[it.fi]>sz/2){
p=i;
i=it.fi;
goto reloop;
}
}
if (sz!=1){
TIME=1;
subtree[i].push_back(ii(1,1));
root[i]=new node(0,dfs(i,-1,i).se+1);
}
else{
degen[i]=true;
}
used[i]=true;
sz--;
for (auto &it:al[i]){
if (it.fi==p || used[it.fi]) continue;
sz-=ss[it.fi];
centroid(it.fi,ss[it.fi]);
}
if (p!=-1) centroid(p,sz);
}
void get(int i){
auto temp=root[i]->query(root[i]->s,root[i]->e);
mxroot->update(i,temp.fi+max(root[i]->query(root[i]->s,subtree[i][temp.se].fi-1),root[i]->query(subtree[i][temp.se].se+1,root[i]->e)).fi);
}
int main(){
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
cin>>n>>q>>w;
ll a,b,c;
rep(x,0,n-1){
cin>>a>>b>>c;
al[a].push_back(ii(b,x));
al[b].push_back(ii(a,x));
cw[x]=c;
}
centroid(1,n);
rep(x,0,n-1){
for (auto &it:pos[x]){
root[it.fi]->update(range[it.fi][it.se].fi,range[it.fi][it.se].se,cw[x]);
}
}
rep(x,1,n+1){
if (degen[x]) continue;
get(x);
}
ll last=0;
ll d,e;
while (q--){
cin>>d>>e;
d=(d+last)%(n-1);
e=(e+last)%w;
for (auto &it:pos[d]){
root[it.fi]->update(range[it.fi][it.se].fi,range[it.fi][it.se].se,e-cw[d]);
get(it.fi);
}
cw[d]=e;
last=mxroot->val;
cout<<last<<endl;
}
}
Compilation message
diameter.cpp: In constructor 'node::node(int, int)':
diameter.cpp:41:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
s=_s,e=_e,m=s+e>>1;
~^~
diameter.cpp: In constructor 'mxnode::mxnode(int, int)':
diameter.cpp:91:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
s=_s,e=_e,m=s+e>>1;
~^~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
16 ms |
19200 KB |
Output is correct |
2 |
Correct |
15 ms |
19200 KB |
Output is correct |
3 |
Correct |
23 ms |
19192 KB |
Output is correct |
4 |
Correct |
14 ms |
19200 KB |
Output is correct |
5 |
Correct |
14 ms |
19200 KB |
Output is correct |
6 |
Correct |
14 ms |
19200 KB |
Output is correct |
7 |
Correct |
15 ms |
19200 KB |
Output is correct |
8 |
Correct |
16 ms |
19192 KB |
Output is correct |
9 |
Correct |
24 ms |
19200 KB |
Output is correct |
10 |
Correct |
15 ms |
19200 KB |
Output is correct |
11 |
Correct |
14 ms |
19200 KB |
Output is correct |
12 |
Correct |
15 ms |
19200 KB |
Output is correct |
13 |
Correct |
15 ms |
19200 KB |
Output is correct |
14 |
Correct |
15 ms |
19200 KB |
Output is correct |
15 |
Correct |
17 ms |
19200 KB |
Output is correct |
16 |
Correct |
15 ms |
19200 KB |
Output is correct |
17 |
Correct |
15 ms |
19200 KB |
Output is correct |
18 |
Correct |
15 ms |
19200 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
16 ms |
19200 KB |
Output is correct |
2 |
Correct |
15 ms |
19200 KB |
Output is correct |
3 |
Correct |
23 ms |
19192 KB |
Output is correct |
4 |
Correct |
14 ms |
19200 KB |
Output is correct |
5 |
Correct |
14 ms |
19200 KB |
Output is correct |
6 |
Correct |
14 ms |
19200 KB |
Output is correct |
7 |
Correct |
15 ms |
19200 KB |
Output is correct |
8 |
Correct |
16 ms |
19192 KB |
Output is correct |
9 |
Correct |
24 ms |
19200 KB |
Output is correct |
10 |
Correct |
15 ms |
19200 KB |
Output is correct |
11 |
Correct |
14 ms |
19200 KB |
Output is correct |
12 |
Correct |
15 ms |
19200 KB |
Output is correct |
13 |
Correct |
15 ms |
19200 KB |
Output is correct |
14 |
Correct |
15 ms |
19200 KB |
Output is correct |
15 |
Correct |
17 ms |
19200 KB |
Output is correct |
16 |
Correct |
15 ms |
19200 KB |
Output is correct |
17 |
Correct |
15 ms |
19200 KB |
Output is correct |
18 |
Correct |
15 ms |
19200 KB |
Output is correct |
19 |
Correct |
28 ms |
19968 KB |
Output is correct |
20 |
Correct |
29 ms |
19968 KB |
Output is correct |
21 |
Correct |
33 ms |
20216 KB |
Output is correct |
22 |
Correct |
27 ms |
19960 KB |
Output is correct |
23 |
Correct |
50 ms |
23672 KB |
Output is correct |
24 |
Correct |
62 ms |
24388 KB |
Output is correct |
25 |
Correct |
81 ms |
25128 KB |
Output is correct |
26 |
Correct |
53 ms |
23900 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
15 ms |
19200 KB |
Output is correct |
2 |
Correct |
16 ms |
19200 KB |
Output is correct |
3 |
Correct |
21 ms |
19200 KB |
Output is correct |
4 |
Correct |
24 ms |
19200 KB |
Output is correct |
5 |
Correct |
77 ms |
19576 KB |
Output is correct |
6 |
Correct |
14 ms |
19200 KB |
Output is correct |
7 |
Correct |
16 ms |
19328 KB |
Output is correct |
8 |
Correct |
16 ms |
19328 KB |
Output is correct |
9 |
Correct |
18 ms |
19328 KB |
Output is correct |
10 |
Correct |
28 ms |
19328 KB |
Output is correct |
11 |
Correct |
84 ms |
19612 KB |
Output is correct |
12 |
Correct |
18 ms |
20352 KB |
Output is correct |
13 |
Correct |
20 ms |
20352 KB |
Output is correct |
14 |
Correct |
22 ms |
20480 KB |
Output is correct |
15 |
Correct |
34 ms |
20480 KB |
Output is correct |
16 |
Correct |
108 ms |
20984 KB |
Output is correct |
17 |
Correct |
91 ms |
44004 KB |
Output is correct |
18 |
Correct |
97 ms |
44004 KB |
Output is correct |
19 |
Correct |
93 ms |
44004 KB |
Output is correct |
20 |
Correct |
122 ms |
44128 KB |
Output is correct |
21 |
Correct |
255 ms |
44640 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
20 ms |
20224 KB |
Output is correct |
2 |
Correct |
39 ms |
20224 KB |
Output is correct |
3 |
Correct |
129 ms |
20600 KB |
Output is correct |
4 |
Correct |
230 ms |
20856 KB |
Output is correct |
5 |
Correct |
66 ms |
34168 KB |
Output is correct |
6 |
Correct |
111 ms |
34196 KB |
Output is correct |
7 |
Correct |
332 ms |
34292 KB |
Output is correct |
8 |
Correct |
546 ms |
34688 KB |
Output is correct |
9 |
Correct |
311 ms |
105068 KB |
Output is correct |
10 |
Correct |
410 ms |
105040 KB |
Output is correct |
11 |
Correct |
780 ms |
105320 KB |
Output is correct |
12 |
Correct |
1151 ms |
105568 KB |
Output is correct |
13 |
Correct |
640 ms |
200200 KB |
Output is correct |
14 |
Correct |
751 ms |
200164 KB |
Output is correct |
15 |
Correct |
1177 ms |
200372 KB |
Output is correct |
16 |
Correct |
1721 ms |
200592 KB |
Output is correct |
17 |
Correct |
2506 ms |
201040 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2993 ms |
147340 KB |
Output is correct |
2 |
Correct |
3161 ms |
151196 KB |
Output is correct |
3 |
Correct |
3008 ms |
150028 KB |
Output is correct |
4 |
Correct |
3091 ms |
151716 KB |
Output is correct |
5 |
Correct |
3052 ms |
144232 KB |
Output is correct |
6 |
Correct |
2372 ms |
100752 KB |
Output is correct |
7 |
Correct |
4413 ms |
169768 KB |
Output is correct |
8 |
Correct |
4318 ms |
173668 KB |
Output is correct |
9 |
Correct |
4510 ms |
173428 KB |
Output is correct |
10 |
Correct |
4424 ms |
173496 KB |
Output is correct |
11 |
Correct |
4279 ms |
165296 KB |
Output is correct |
12 |
Correct |
3076 ms |
110760 KB |
Output is correct |
13 |
Correct |
1871 ms |
125580 KB |
Output is correct |
14 |
Correct |
1793 ms |
125540 KB |
Output is correct |
15 |
Correct |
1804 ms |
125796 KB |
Output is correct |
16 |
Correct |
1916 ms |
126112 KB |
Output is correct |
17 |
Correct |
1915 ms |
124140 KB |
Output is correct |
18 |
Correct |
1466 ms |
92240 KB |
Output is correct |
19 |
Correct |
1813 ms |
125744 KB |
Output is correct |
20 |
Correct |
1787 ms |
125540 KB |
Output is correct |
21 |
Correct |
1797 ms |
125640 KB |
Output is correct |
22 |
Correct |
2007 ms |
125992 KB |
Output is correct |
23 |
Correct |
1858 ms |
124008 KB |
Output is correct |
24 |
Correct |
1360 ms |
92264 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
16 ms |
19200 KB |
Output is correct |
2 |
Correct |
15 ms |
19200 KB |
Output is correct |
3 |
Correct |
23 ms |
19192 KB |
Output is correct |
4 |
Correct |
14 ms |
19200 KB |
Output is correct |
5 |
Correct |
14 ms |
19200 KB |
Output is correct |
6 |
Correct |
14 ms |
19200 KB |
Output is correct |
7 |
Correct |
15 ms |
19200 KB |
Output is correct |
8 |
Correct |
16 ms |
19192 KB |
Output is correct |
9 |
Correct |
24 ms |
19200 KB |
Output is correct |
10 |
Correct |
15 ms |
19200 KB |
Output is correct |
11 |
Correct |
14 ms |
19200 KB |
Output is correct |
12 |
Correct |
15 ms |
19200 KB |
Output is correct |
13 |
Correct |
15 ms |
19200 KB |
Output is correct |
14 |
Correct |
15 ms |
19200 KB |
Output is correct |
15 |
Correct |
17 ms |
19200 KB |
Output is correct |
16 |
Correct |
15 ms |
19200 KB |
Output is correct |
17 |
Correct |
15 ms |
19200 KB |
Output is correct |
18 |
Correct |
15 ms |
19200 KB |
Output is correct |
19 |
Correct |
28 ms |
19968 KB |
Output is correct |
20 |
Correct |
29 ms |
19968 KB |
Output is correct |
21 |
Correct |
33 ms |
20216 KB |
Output is correct |
22 |
Correct |
27 ms |
19960 KB |
Output is correct |
23 |
Correct |
50 ms |
23672 KB |
Output is correct |
24 |
Correct |
62 ms |
24388 KB |
Output is correct |
25 |
Correct |
81 ms |
25128 KB |
Output is correct |
26 |
Correct |
53 ms |
23900 KB |
Output is correct |
27 |
Correct |
15 ms |
19200 KB |
Output is correct |
28 |
Correct |
16 ms |
19200 KB |
Output is correct |
29 |
Correct |
21 ms |
19200 KB |
Output is correct |
30 |
Correct |
24 ms |
19200 KB |
Output is correct |
31 |
Correct |
77 ms |
19576 KB |
Output is correct |
32 |
Correct |
14 ms |
19200 KB |
Output is correct |
33 |
Correct |
16 ms |
19328 KB |
Output is correct |
34 |
Correct |
16 ms |
19328 KB |
Output is correct |
35 |
Correct |
18 ms |
19328 KB |
Output is correct |
36 |
Correct |
28 ms |
19328 KB |
Output is correct |
37 |
Correct |
84 ms |
19612 KB |
Output is correct |
38 |
Correct |
18 ms |
20352 KB |
Output is correct |
39 |
Correct |
20 ms |
20352 KB |
Output is correct |
40 |
Correct |
22 ms |
20480 KB |
Output is correct |
41 |
Correct |
34 ms |
20480 KB |
Output is correct |
42 |
Correct |
108 ms |
20984 KB |
Output is correct |
43 |
Correct |
91 ms |
44004 KB |
Output is correct |
44 |
Correct |
97 ms |
44004 KB |
Output is correct |
45 |
Correct |
93 ms |
44004 KB |
Output is correct |
46 |
Correct |
122 ms |
44128 KB |
Output is correct |
47 |
Correct |
255 ms |
44640 KB |
Output is correct |
48 |
Correct |
20 ms |
20224 KB |
Output is correct |
49 |
Correct |
39 ms |
20224 KB |
Output is correct |
50 |
Correct |
129 ms |
20600 KB |
Output is correct |
51 |
Correct |
230 ms |
20856 KB |
Output is correct |
52 |
Correct |
66 ms |
34168 KB |
Output is correct |
53 |
Correct |
111 ms |
34196 KB |
Output is correct |
54 |
Correct |
332 ms |
34292 KB |
Output is correct |
55 |
Correct |
546 ms |
34688 KB |
Output is correct |
56 |
Correct |
311 ms |
105068 KB |
Output is correct |
57 |
Correct |
410 ms |
105040 KB |
Output is correct |
58 |
Correct |
780 ms |
105320 KB |
Output is correct |
59 |
Correct |
1151 ms |
105568 KB |
Output is correct |
60 |
Correct |
640 ms |
200200 KB |
Output is correct |
61 |
Correct |
751 ms |
200164 KB |
Output is correct |
62 |
Correct |
1177 ms |
200372 KB |
Output is correct |
63 |
Correct |
1721 ms |
200592 KB |
Output is correct |
64 |
Correct |
2506 ms |
201040 KB |
Output is correct |
65 |
Correct |
2993 ms |
147340 KB |
Output is correct |
66 |
Correct |
3161 ms |
151196 KB |
Output is correct |
67 |
Correct |
3008 ms |
150028 KB |
Output is correct |
68 |
Correct |
3091 ms |
151716 KB |
Output is correct |
69 |
Correct |
3052 ms |
144232 KB |
Output is correct |
70 |
Correct |
2372 ms |
100752 KB |
Output is correct |
71 |
Correct |
4413 ms |
169768 KB |
Output is correct |
72 |
Correct |
4318 ms |
173668 KB |
Output is correct |
73 |
Correct |
4510 ms |
173428 KB |
Output is correct |
74 |
Correct |
4424 ms |
173496 KB |
Output is correct |
75 |
Correct |
4279 ms |
165296 KB |
Output is correct |
76 |
Correct |
3076 ms |
110760 KB |
Output is correct |
77 |
Correct |
1871 ms |
125580 KB |
Output is correct |
78 |
Correct |
1793 ms |
125540 KB |
Output is correct |
79 |
Correct |
1804 ms |
125796 KB |
Output is correct |
80 |
Correct |
1916 ms |
126112 KB |
Output is correct |
81 |
Correct |
1915 ms |
124140 KB |
Output is correct |
82 |
Correct |
1466 ms |
92240 KB |
Output is correct |
83 |
Correct |
1813 ms |
125744 KB |
Output is correct |
84 |
Correct |
1787 ms |
125540 KB |
Output is correct |
85 |
Correct |
1797 ms |
125640 KB |
Output is correct |
86 |
Correct |
2007 ms |
125992 KB |
Output is correct |
87 |
Correct |
1858 ms |
124008 KB |
Output is correct |
88 |
Correct |
1360 ms |
92264 KB |
Output is correct |
89 |
Correct |
3103 ms |
152380 KB |
Output is correct |
90 |
Correct |
3651 ms |
165040 KB |
Output is correct |
91 |
Correct |
4168 ms |
174680 KB |
Output is correct |
92 |
Correct |
4301 ms |
173096 KB |
Output is correct |
93 |
Correct |
4096 ms |
164968 KB |
Output is correct |
94 |
Correct |
3386 ms |
153036 KB |
Output is correct |
95 |
Correct |
1819 ms |
125188 KB |
Output is correct |
96 |
Correct |
1777 ms |
125024 KB |
Output is correct |
97 |
Correct |
1764 ms |
124872 KB |
Output is correct |
98 |
Correct |
1966 ms |
124900 KB |
Output is correct |
99 |
Correct |
1830 ms |
124948 KB |
Output is correct |
100 |
Correct |
1753 ms |
124900 KB |
Output is correct |