/*
#pragma GCC optimize("O2")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx,avx2,sse,sse2,fma,tune=native")
//*/
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define int ll
typedef long double ld;
typedef pair<int ,int > pii;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const ll maxn = 2e5+100;
const ll mod =1e9+7;
const ld PI = acos((ld)-1);
#define pb push_back
#define endl '\n'
#define dokme(x) cout << x , exit(0)
#define migmig ios::sync_with_stdio(false),cin.tie(0),cout.tie(0)
#define ms(x , y) memset(x , y , sizeof x)
ll pw(ll a, ll b, ll md = mod){ll res = 1;while(b){if(b&1){res=(a*res)%md;}a=(a*a)%md;b>>=1;}return(res);}
int n , q;
int lim;
vector < int > a;
struct node{
int mn = 1e18 , mx = -1e18 , pref = -1e18 , suff = -1e18 , ans = -1e18;
node operator+ (const node &r) const{
node Ans;
Ans.mn = min(mn , r.mn);
Ans.mx = max(mx , r.mx);
Ans.pref = max({pref , r.pref , mx - 2*r.mn});
Ans.suff = max({suff , r.suff ,-2*mn + r.mx});
Ans.ans = max({ans , r.ans , pref + r.mx , mx + r.suff});
return(Ans);
}
};
vector < node > seg; //dicaprio
int lazy[maxn*4];
void build(int v = 1 , int l = 1 , int r = 2*n){
if(r - l == 1){
seg[v].mx = seg[v].mn = a[l];
seg[v].suff = seg[v].pref = -seg[v].mx;
seg[v].ans = 0;
return;
}
int mid = (l + r) / 2;
build(2*v , l , mid);
build(2*v + 1 , mid , r);
seg[v] = seg[2*v] + seg[2*v + 1];
}
void shift(int v , int l , int r){
seg[v].mn += lazy[v] , seg[v].mx += lazy[v];
seg[v].pref-=lazy[v] , seg[v].suff-=lazy[v];
if(r - l > 1)
lazy[2*v] += lazy[v] , lazy[2*v + 1] += lazy[v];
lazy[v] = 0;
}
void update(int L ,int R , int val , int v = 1 , int l = 1, int r = 2*n){
shift(v , l , r);
if(R <= l or r <= L)
return;
if(L <= l and r <= R){
lazy[v] += val;
shift(v , l , r);
return;
}
int mid = (l + r)/2;
update(L , R , val , 2*v , l , mid);
update(L , R , val , 2*v + 1 , mid , r);
seg[v] = seg[2*v] + seg[2*v + 1];
}
vector < pii > adj[maxn];
vector < pair < int , pii > > e;
int P[maxn];
int l [maxn] , r[maxn] , t = 1;
void dfs(int v = 1 , int par = 0 , int h = 0){
P[v] = par;
a.pb(h);
r[v] = l[v] = t++;
for(auto [u , w] : adj[v])
if(u!=par){
dfs(u , v , h+w);
a.pb(h);
r[v] = t++;
}
}
int32_t main(){
migmig;
cin >> n >> q >> lim;
seg.reserve(maxn*4);
for(int i = 1 ; i < n ; i ++){
int u , v , w;
cin >> u >> v >> w;
adj[u].pb({v , w});
adj[v].pb({u , w});
e.pb({w , {u , v}});
}
a.pb(177013);
dfs();
build();
int lst = 0;
while(q -- ){
int p , w;
cin >> p >> w;
p = (p + lst)%(n - 1);
w = (w + lst)%lim;
auto &ed = e[p];
int diff = w - ed.first;
int par = ed.second.second;
if(P[par]!=ed.second.first)par = ed.second.first;
ed.first = w;
update(l[par] , r[par]+1 , diff);
cout << (lst = seg[1].ans) << endl;
}
return(0);
}
Compilation message
diameter.cpp: In function 'void dfs(ll, ll, ll)':
diameter.cpp:98:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
98 | for(auto [u , w] : adj[v])
| ^
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
5100 KB |
Output is correct |
2 |
Correct |
3 ms |
5100 KB |
Output is correct |
3 |
Correct |
3 ms |
5100 KB |
Output is correct |
4 |
Correct |
3 ms |
5100 KB |
Output is correct |
5 |
Correct |
3 ms |
5100 KB |
Output is correct |
6 |
Correct |
3 ms |
5100 KB |
Output is correct |
7 |
Correct |
3 ms |
5120 KB |
Output is correct |
8 |
Correct |
3 ms |
5112 KB |
Output is correct |
9 |
Correct |
3 ms |
5100 KB |
Output is correct |
10 |
Correct |
4 ms |
5100 KB |
Output is correct |
11 |
Correct |
4 ms |
5100 KB |
Output is correct |
12 |
Correct |
4 ms |
5100 KB |
Output is correct |
13 |
Correct |
4 ms |
5100 KB |
Output is correct |
14 |
Correct |
4 ms |
5100 KB |
Output is correct |
15 |
Correct |
3 ms |
5100 KB |
Output is correct |
16 |
Correct |
3 ms |
5228 KB |
Output is correct |
17 |
Correct |
3 ms |
5100 KB |
Output is correct |
18 |
Correct |
3 ms |
5100 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
5100 KB |
Output is correct |
2 |
Correct |
3 ms |
5100 KB |
Output is correct |
3 |
Correct |
3 ms |
5100 KB |
Output is correct |
4 |
Correct |
3 ms |
5100 KB |
Output is correct |
5 |
Correct |
3 ms |
5100 KB |
Output is correct |
6 |
Correct |
3 ms |
5100 KB |
Output is correct |
7 |
Correct |
3 ms |
5120 KB |
Output is correct |
8 |
Correct |
3 ms |
5112 KB |
Output is correct |
9 |
Correct |
3 ms |
5100 KB |
Output is correct |
10 |
Correct |
4 ms |
5100 KB |
Output is correct |
11 |
Correct |
4 ms |
5100 KB |
Output is correct |
12 |
Correct |
4 ms |
5100 KB |
Output is correct |
13 |
Correct |
4 ms |
5100 KB |
Output is correct |
14 |
Correct |
4 ms |
5100 KB |
Output is correct |
15 |
Correct |
3 ms |
5100 KB |
Output is correct |
16 |
Correct |
3 ms |
5228 KB |
Output is correct |
17 |
Correct |
3 ms |
5100 KB |
Output is correct |
18 |
Correct |
3 ms |
5100 KB |
Output is correct |
19 |
Correct |
8 ms |
5484 KB |
Output is correct |
20 |
Correct |
9 ms |
5484 KB |
Output is correct |
21 |
Correct |
10 ms |
5484 KB |
Output is correct |
22 |
Correct |
9 ms |
5612 KB |
Output is correct |
23 |
Correct |
13 ms |
7532 KB |
Output is correct |
24 |
Correct |
13 ms |
7532 KB |
Output is correct |
25 |
Correct |
14 ms |
7532 KB |
Output is correct |
26 |
Correct |
15 ms |
7916 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
5100 KB |
Output is correct |
2 |
Correct |
3 ms |
5100 KB |
Output is correct |
3 |
Correct |
4 ms |
5100 KB |
Output is correct |
4 |
Correct |
13 ms |
5356 KB |
Output is correct |
5 |
Correct |
51 ms |
6252 KB |
Output is correct |
6 |
Correct |
3 ms |
5100 KB |
Output is correct |
7 |
Correct |
4 ms |
5228 KB |
Output is correct |
8 |
Correct |
4 ms |
5228 KB |
Output is correct |
9 |
Correct |
5 ms |
5356 KB |
Output is correct |
10 |
Correct |
18 ms |
5612 KB |
Output is correct |
11 |
Correct |
78 ms |
6636 KB |
Output is correct |
12 |
Correct |
6 ms |
7276 KB |
Output is correct |
13 |
Correct |
9 ms |
7404 KB |
Output is correct |
14 |
Correct |
9 ms |
7404 KB |
Output is correct |
15 |
Correct |
26 ms |
7788 KB |
Output is correct |
16 |
Correct |
98 ms |
8812 KB |
Output is correct |
17 |
Correct |
58 ms |
40272 KB |
Output is correct |
18 |
Correct |
66 ms |
41424 KB |
Output is correct |
19 |
Correct |
62 ms |
43872 KB |
Output is correct |
20 |
Correct |
92 ms |
44372 KB |
Output is correct |
21 |
Correct |
246 ms |
45648 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
5484 KB |
Output is correct |
2 |
Correct |
14 ms |
5612 KB |
Output is correct |
3 |
Correct |
54 ms |
6124 KB |
Output is correct |
4 |
Correct |
104 ms |
6764 KB |
Output is correct |
5 |
Correct |
12 ms |
9768 KB |
Output is correct |
6 |
Correct |
24 ms |
9896 KB |
Output is correct |
7 |
Correct |
79 ms |
10664 KB |
Output is correct |
8 |
Correct |
143 ms |
11304 KB |
Output is correct |
9 |
Correct |
38 ms |
24992 KB |
Output is correct |
10 |
Correct |
52 ms |
25248 KB |
Output is correct |
11 |
Correct |
127 ms |
25888 KB |
Output is correct |
12 |
Correct |
213 ms |
26784 KB |
Output is correct |
13 |
Correct |
69 ms |
44312 KB |
Output is correct |
14 |
Correct |
87 ms |
45208 KB |
Output is correct |
15 |
Correct |
172 ms |
45976 KB |
Output is correct |
16 |
Correct |
269 ms |
46744 KB |
Output is correct |
17 |
Correct |
260 ms |
46488 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
344 ms |
48976 KB |
Output is correct |
2 |
Correct |
352 ms |
48992 KB |
Output is correct |
3 |
Correct |
352 ms |
49048 KB |
Output is correct |
4 |
Correct |
341 ms |
49008 KB |
Output is correct |
5 |
Correct |
346 ms |
48536 KB |
Output is correct |
6 |
Correct |
312 ms |
46608 KB |
Output is correct |
7 |
Correct |
368 ms |
52120 KB |
Output is correct |
8 |
Correct |
366 ms |
51992 KB |
Output is correct |
9 |
Correct |
391 ms |
52048 KB |
Output is correct |
10 |
Correct |
359 ms |
51864 KB |
Output is correct |
11 |
Correct |
355 ms |
51480 KB |
Output is correct |
12 |
Correct |
341 ms |
48796 KB |
Output is correct |
13 |
Correct |
426 ms |
56580 KB |
Output is correct |
14 |
Correct |
414 ms |
56728 KB |
Output is correct |
15 |
Correct |
419 ms |
56600 KB |
Output is correct |
16 |
Correct |
424 ms |
56600 KB |
Output is correct |
17 |
Correct |
432 ms |
55576 KB |
Output is correct |
18 |
Correct |
398 ms |
50536 KB |
Output is correct |
19 |
Correct |
409 ms |
56600 KB |
Output is correct |
20 |
Correct |
428 ms |
56600 KB |
Output is correct |
21 |
Correct |
422 ms |
56728 KB |
Output is correct |
22 |
Correct |
416 ms |
56600 KB |
Output is correct |
23 |
Correct |
426 ms |
55576 KB |
Output is correct |
24 |
Correct |
394 ms |
50444 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
5100 KB |
Output is correct |
2 |
Correct |
3 ms |
5100 KB |
Output is correct |
3 |
Correct |
3 ms |
5100 KB |
Output is correct |
4 |
Correct |
3 ms |
5100 KB |
Output is correct |
5 |
Correct |
3 ms |
5100 KB |
Output is correct |
6 |
Correct |
3 ms |
5100 KB |
Output is correct |
7 |
Correct |
3 ms |
5120 KB |
Output is correct |
8 |
Correct |
3 ms |
5112 KB |
Output is correct |
9 |
Correct |
3 ms |
5100 KB |
Output is correct |
10 |
Correct |
4 ms |
5100 KB |
Output is correct |
11 |
Correct |
4 ms |
5100 KB |
Output is correct |
12 |
Correct |
4 ms |
5100 KB |
Output is correct |
13 |
Correct |
4 ms |
5100 KB |
Output is correct |
14 |
Correct |
4 ms |
5100 KB |
Output is correct |
15 |
Correct |
3 ms |
5100 KB |
Output is correct |
16 |
Correct |
3 ms |
5228 KB |
Output is correct |
17 |
Correct |
3 ms |
5100 KB |
Output is correct |
18 |
Correct |
3 ms |
5100 KB |
Output is correct |
19 |
Correct |
8 ms |
5484 KB |
Output is correct |
20 |
Correct |
9 ms |
5484 KB |
Output is correct |
21 |
Correct |
10 ms |
5484 KB |
Output is correct |
22 |
Correct |
9 ms |
5612 KB |
Output is correct |
23 |
Correct |
13 ms |
7532 KB |
Output is correct |
24 |
Correct |
13 ms |
7532 KB |
Output is correct |
25 |
Correct |
14 ms |
7532 KB |
Output is correct |
26 |
Correct |
15 ms |
7916 KB |
Output is correct |
27 |
Correct |
4 ms |
5100 KB |
Output is correct |
28 |
Correct |
3 ms |
5100 KB |
Output is correct |
29 |
Correct |
4 ms |
5100 KB |
Output is correct |
30 |
Correct |
13 ms |
5356 KB |
Output is correct |
31 |
Correct |
51 ms |
6252 KB |
Output is correct |
32 |
Correct |
3 ms |
5100 KB |
Output is correct |
33 |
Correct |
4 ms |
5228 KB |
Output is correct |
34 |
Correct |
4 ms |
5228 KB |
Output is correct |
35 |
Correct |
5 ms |
5356 KB |
Output is correct |
36 |
Correct |
18 ms |
5612 KB |
Output is correct |
37 |
Correct |
78 ms |
6636 KB |
Output is correct |
38 |
Correct |
6 ms |
7276 KB |
Output is correct |
39 |
Correct |
9 ms |
7404 KB |
Output is correct |
40 |
Correct |
9 ms |
7404 KB |
Output is correct |
41 |
Correct |
26 ms |
7788 KB |
Output is correct |
42 |
Correct |
98 ms |
8812 KB |
Output is correct |
43 |
Correct |
58 ms |
40272 KB |
Output is correct |
44 |
Correct |
66 ms |
41424 KB |
Output is correct |
45 |
Correct |
62 ms |
43872 KB |
Output is correct |
46 |
Correct |
92 ms |
44372 KB |
Output is correct |
47 |
Correct |
246 ms |
45648 KB |
Output is correct |
48 |
Correct |
5 ms |
5484 KB |
Output is correct |
49 |
Correct |
14 ms |
5612 KB |
Output is correct |
50 |
Correct |
54 ms |
6124 KB |
Output is correct |
51 |
Correct |
104 ms |
6764 KB |
Output is correct |
52 |
Correct |
12 ms |
9768 KB |
Output is correct |
53 |
Correct |
24 ms |
9896 KB |
Output is correct |
54 |
Correct |
79 ms |
10664 KB |
Output is correct |
55 |
Correct |
143 ms |
11304 KB |
Output is correct |
56 |
Correct |
38 ms |
24992 KB |
Output is correct |
57 |
Correct |
52 ms |
25248 KB |
Output is correct |
58 |
Correct |
127 ms |
25888 KB |
Output is correct |
59 |
Correct |
213 ms |
26784 KB |
Output is correct |
60 |
Correct |
69 ms |
44312 KB |
Output is correct |
61 |
Correct |
87 ms |
45208 KB |
Output is correct |
62 |
Correct |
172 ms |
45976 KB |
Output is correct |
63 |
Correct |
269 ms |
46744 KB |
Output is correct |
64 |
Correct |
260 ms |
46488 KB |
Output is correct |
65 |
Correct |
344 ms |
48976 KB |
Output is correct |
66 |
Correct |
352 ms |
48992 KB |
Output is correct |
67 |
Correct |
352 ms |
49048 KB |
Output is correct |
68 |
Correct |
341 ms |
49008 KB |
Output is correct |
69 |
Correct |
346 ms |
48536 KB |
Output is correct |
70 |
Correct |
312 ms |
46608 KB |
Output is correct |
71 |
Correct |
368 ms |
52120 KB |
Output is correct |
72 |
Correct |
366 ms |
51992 KB |
Output is correct |
73 |
Correct |
391 ms |
52048 KB |
Output is correct |
74 |
Correct |
359 ms |
51864 KB |
Output is correct |
75 |
Correct |
355 ms |
51480 KB |
Output is correct |
76 |
Correct |
341 ms |
48796 KB |
Output is correct |
77 |
Correct |
426 ms |
56580 KB |
Output is correct |
78 |
Correct |
414 ms |
56728 KB |
Output is correct |
79 |
Correct |
419 ms |
56600 KB |
Output is correct |
80 |
Correct |
424 ms |
56600 KB |
Output is correct |
81 |
Correct |
432 ms |
55576 KB |
Output is correct |
82 |
Correct |
398 ms |
50536 KB |
Output is correct |
83 |
Correct |
409 ms |
56600 KB |
Output is correct |
84 |
Correct |
428 ms |
56600 KB |
Output is correct |
85 |
Correct |
422 ms |
56728 KB |
Output is correct |
86 |
Correct |
416 ms |
56600 KB |
Output is correct |
87 |
Correct |
426 ms |
55576 KB |
Output is correct |
88 |
Correct |
394 ms |
50444 KB |
Output is correct |
89 |
Correct |
338 ms |
48024 KB |
Output is correct |
90 |
Correct |
331 ms |
48536 KB |
Output is correct |
91 |
Correct |
352 ms |
50352 KB |
Output is correct |
92 |
Correct |
363 ms |
49996 KB |
Output is correct |
93 |
Correct |
379 ms |
52760 KB |
Output is correct |
94 |
Correct |
380 ms |
51828 KB |
Output is correct |
95 |
Correct |
407 ms |
53688 KB |
Output is correct |
96 |
Correct |
405 ms |
52508 KB |
Output is correct |
97 |
Correct |
409 ms |
53528 KB |
Output is correct |
98 |
Correct |
408 ms |
55960 KB |
Output is correct |
99 |
Correct |
406 ms |
53340 KB |
Output is correct |
100 |
Correct |
398 ms |
53144 KB |
Output is correct |