#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define se second
typedef pair <ll, ll> ii;
const ll N = 1e5 + 99;
struct st
{
ll s, t, z, w;
};
st qs[N];
ll n, m, q, up[N][20], In[N], Out[N], h[N], cnt;
ll num[N], diff[N], dd[N], ans[N];
ii edg[N];
vector <ll> adj[N];
vector <ii> vt;
void dfs(ll u)
{
In[u] = ++cnt;
for (ll v : adj[u])
{
if (up[u][0] == v) continue;
h[v] = h[u] + 1;
up[v][0] = u;
for (int i = 1; i <= 16; i++)
{
up[v][i] = up[up[v][i - 1]][i - 1];
}
dfs(v);
}
Out[u] = cnt;
}
void pre(ll u)
{
for (ll v : adj[u])
{
if (up[u][0] == v) continue;
dd[v] += dd[u];
pre(v);
}
}
ll lca(ll u, ll v)
{
if (h[u] < h[v]) swap(u, v);
ll k = h[u] - h[v];
for (int i = 0; (1 << i) <= k; i++)
{
if (k >> i & 1)
{
u = up[u][i];
}
}
if (u == v) return u;
k = log2(h[u]);
for (int i = k; i >= 0; i--)
{
if (up[u][i] != up[v][i])
{
u = up[u][i];
v = up[v][i];
}
}
return up[u][0];
}
void update(ll x, ll val)
{
for (; x <= cnt; x += (x & -x))
{
diff[x] += val;
if (val >= 0) num[x]++;
else num[x]--;
}
}
ll getval(ll x)
{
ll res = 0;
for (; x > 0; x &= (x - 1))
{
res += diff[x];
}
return res;
}
ll getnum(ll x)
{
ll res = 0;
for (; x > 0; x &= (x - 1))
{
res += num[x];
}
return res;
}
void solve(ll l, ll r, vector <ll> id)
{
if (l > r || id.size() == 0) return;
vector <ll> left, right;
ll mid = (l + r) / 2;
for (int i = l; i <= mid; i++)
{
auto [c, u] = vt[i - 1];
update(In[u], c);
update(Out[u] + 1, -c);
}
for (ll i : id)
{
ll path = lca(qs[i].s, qs[i].t);
ll val = getval(In[qs[i].s]) + getval(In[qs[i].t]) - 2 * getval(In[path]);
if (val <= qs[i].w)
{
right.push_back(i);
ans[i] = max(ans[i], getnum(In[qs[i].s]) + getnum(In[qs[i].t]) - 2 * getnum(In[path]));
}
else left.push_back(i);
}
solve(mid + 1, r, right);
for (int i = l; i <= mid; i++)
{
auto [c, u] = vt[i - 1];
update(In[u], -c);
update(Out[u] + 1, c);
}
if (l != r) solve(l, mid, left);
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
if(fopen("test.inp", "r"))
{
freopen("test.inp", "r", stdin);
freopen("test.out", "w", stdout);
}
cin >> n >> m >> q;
for (int i = 1; i < n; i++)
{
cin >> edg[i].fi >> edg[i].se;
adj[edg[i].fi].push_back(edg[i].se);
adj[edg[i].se].push_back(edg[i].fi);
}
dfs(1);
for (int i = 1; i <= m; i++)
{
ll x, c;
cin >> x >> c;
ll res = edg[x].fi;
if (h[edg[x].fi] < h[edg[x].se]) res = edg[x].se;
dd[res]++;
vt.push_back({c, res});
}
pre(1);
sort(vt.begin(), vt.end());
vector <ll> id;
for (int i = 1; i <= q; i++)
{
cin >> qs[i].s >> qs[i].t >> qs[i].z >> qs[i].w;
id.push_back(i);
}
solve(1, m, id);
for (int i = 1; i <= q; i++)
{
ll path = lca(qs[i].s, qs[i].t);
ll res = dd[qs[i].s] + dd[qs[i].t] - 2 * dd[path];
if (res - ans[i] > qs[i].z)
{
cout << -1 << '\n';
}
else
{
cout << qs[i].z - (res - ans[i]) << '\n';
}
}
}
Compilation message
currencies.cpp: In function 'void solve(long long int, long long int, std::vector<long long int>)':
currencies.cpp:114:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
114 | auto [c, u] = vt[i - 1];
| ^
currencies.cpp:135:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
135 | auto [c, u] = vt[i - 1];
| ^
currencies.cpp: In function 'int main()':
currencies.cpp:151:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
151 | freopen("test.inp", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
currencies.cpp:152:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
152 | freopen("test.out", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
10840 KB |
Output is correct |
2 |
Correct |
2 ms |
10844 KB |
Output is correct |
3 |
Correct |
3 ms |
10844 KB |
Output is correct |
4 |
Correct |
2 ms |
10844 KB |
Output is correct |
5 |
Correct |
5 ms |
11100 KB |
Output is correct |
6 |
Correct |
6 ms |
11092 KB |
Output is correct |
7 |
Correct |
6 ms |
11100 KB |
Output is correct |
8 |
Correct |
7 ms |
11100 KB |
Output is correct |
9 |
Correct |
7 ms |
11100 KB |
Output is correct |
10 |
Correct |
7 ms |
11100 KB |
Output is correct |
11 |
Correct |
7 ms |
11096 KB |
Output is correct |
12 |
Correct |
7 ms |
11100 KB |
Output is correct |
13 |
Correct |
9 ms |
11100 KB |
Output is correct |
14 |
Correct |
7 ms |
11100 KB |
Output is correct |
15 |
Correct |
8 ms |
11044 KB |
Output is correct |
16 |
Correct |
8 ms |
11100 KB |
Output is correct |
17 |
Correct |
8 ms |
11100 KB |
Output is correct |
18 |
Correct |
8 ms |
11100 KB |
Output is correct |
19 |
Correct |
5 ms |
11100 KB |
Output is correct |
20 |
Correct |
5 ms |
11100 KB |
Output is correct |
21 |
Correct |
6 ms |
11100 KB |
Output is correct |
22 |
Correct |
6 ms |
11100 KB |
Output is correct |
23 |
Correct |
6 ms |
11008 KB |
Output is correct |
24 |
Correct |
6 ms |
11100 KB |
Output is correct |
25 |
Correct |
6 ms |
11100 KB |
Output is correct |
26 |
Correct |
5 ms |
11100 KB |
Output is correct |
27 |
Correct |
5 ms |
11100 KB |
Output is correct |
28 |
Correct |
5 ms |
11100 KB |
Output is correct |
29 |
Correct |
6 ms |
11612 KB |
Output is correct |
30 |
Correct |
6 ms |
11100 KB |
Output is correct |
31 |
Correct |
6 ms |
11100 KB |
Output is correct |
32 |
Correct |
7 ms |
11176 KB |
Output is correct |
33 |
Correct |
7 ms |
11096 KB |
Output is correct |
34 |
Correct |
7 ms |
11100 KB |
Output is correct |
35 |
Correct |
6 ms |
11100 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
10844 KB |
Output is correct |
2 |
Correct |
6 ms |
11100 KB |
Output is correct |
3 |
Correct |
6 ms |
10984 KB |
Output is correct |
4 |
Correct |
7 ms |
11144 KB |
Output is correct |
5 |
Correct |
430 ms |
40740 KB |
Output is correct |
6 |
Correct |
466 ms |
40856 KB |
Output is correct |
7 |
Correct |
421 ms |
41928 KB |
Output is correct |
8 |
Correct |
345 ms |
40264 KB |
Output is correct |
9 |
Correct |
359 ms |
39520 KB |
Output is correct |
10 |
Correct |
529 ms |
39356 KB |
Output is correct |
11 |
Correct |
541 ms |
39360 KB |
Output is correct |
12 |
Correct |
526 ms |
39712 KB |
Output is correct |
13 |
Correct |
522 ms |
39536 KB |
Output is correct |
14 |
Correct |
508 ms |
39104 KB |
Output is correct |
15 |
Correct |
706 ms |
43756 KB |
Output is correct |
16 |
Correct |
723 ms |
44388 KB |
Output is correct |
17 |
Correct |
686 ms |
43452 KB |
Output is correct |
18 |
Correct |
738 ms |
37900 KB |
Output is correct |
19 |
Correct |
793 ms |
38300 KB |
Output is correct |
20 |
Correct |
759 ms |
38012 KB |
Output is correct |
21 |
Correct |
403 ms |
45444 KB |
Output is correct |
22 |
Correct |
384 ms |
45380 KB |
Output is correct |
23 |
Correct |
393 ms |
45524 KB |
Output is correct |
24 |
Correct |
374 ms |
45380 KB |
Output is correct |
25 |
Correct |
486 ms |
40136 KB |
Output is correct |
26 |
Correct |
464 ms |
41660 KB |
Output is correct |
27 |
Correct |
504 ms |
41164 KB |
Output is correct |
28 |
Correct |
301 ms |
42300 KB |
Output is correct |
29 |
Correct |
267 ms |
45056 KB |
Output is correct |
30 |
Correct |
371 ms |
41572 KB |
Output is correct |
31 |
Correct |
353 ms |
41416 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
10844 KB |
Output is correct |
2 |
Correct |
7 ms |
11200 KB |
Output is correct |
3 |
Correct |
7 ms |
11176 KB |
Output is correct |
4 |
Correct |
7 ms |
11240 KB |
Output is correct |
5 |
Correct |
466 ms |
45216 KB |
Output is correct |
6 |
Correct |
530 ms |
45496 KB |
Output is correct |
7 |
Correct |
415 ms |
38844 KB |
Output is correct |
8 |
Correct |
641 ms |
43964 KB |
Output is correct |
9 |
Correct |
606 ms |
44060 KB |
Output is correct |
10 |
Correct |
632 ms |
44548 KB |
Output is correct |
11 |
Correct |
454 ms |
43948 KB |
Output is correct |
12 |
Correct |
496 ms |
44248 KB |
Output is correct |
13 |
Correct |
444 ms |
44228 KB |
Output is correct |
14 |
Correct |
242 ms |
44348 KB |
Output is correct |
15 |
Correct |
223 ms |
44356 KB |
Output is correct |
16 |
Correct |
318 ms |
44256 KB |
Output is correct |
17 |
Correct |
290 ms |
44000 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
10840 KB |
Output is correct |
2 |
Correct |
2 ms |
10844 KB |
Output is correct |
3 |
Correct |
3 ms |
10844 KB |
Output is correct |
4 |
Correct |
2 ms |
10844 KB |
Output is correct |
5 |
Correct |
5 ms |
11100 KB |
Output is correct |
6 |
Correct |
6 ms |
11092 KB |
Output is correct |
7 |
Correct |
6 ms |
11100 KB |
Output is correct |
8 |
Correct |
7 ms |
11100 KB |
Output is correct |
9 |
Correct |
7 ms |
11100 KB |
Output is correct |
10 |
Correct |
7 ms |
11100 KB |
Output is correct |
11 |
Correct |
7 ms |
11096 KB |
Output is correct |
12 |
Correct |
7 ms |
11100 KB |
Output is correct |
13 |
Correct |
9 ms |
11100 KB |
Output is correct |
14 |
Correct |
7 ms |
11100 KB |
Output is correct |
15 |
Correct |
8 ms |
11044 KB |
Output is correct |
16 |
Correct |
8 ms |
11100 KB |
Output is correct |
17 |
Correct |
8 ms |
11100 KB |
Output is correct |
18 |
Correct |
8 ms |
11100 KB |
Output is correct |
19 |
Correct |
5 ms |
11100 KB |
Output is correct |
20 |
Correct |
5 ms |
11100 KB |
Output is correct |
21 |
Correct |
6 ms |
11100 KB |
Output is correct |
22 |
Correct |
6 ms |
11100 KB |
Output is correct |
23 |
Correct |
6 ms |
11008 KB |
Output is correct |
24 |
Correct |
6 ms |
11100 KB |
Output is correct |
25 |
Correct |
6 ms |
11100 KB |
Output is correct |
26 |
Correct |
5 ms |
11100 KB |
Output is correct |
27 |
Correct |
5 ms |
11100 KB |
Output is correct |
28 |
Correct |
5 ms |
11100 KB |
Output is correct |
29 |
Correct |
6 ms |
11612 KB |
Output is correct |
30 |
Correct |
6 ms |
11100 KB |
Output is correct |
31 |
Correct |
6 ms |
11100 KB |
Output is correct |
32 |
Correct |
7 ms |
11176 KB |
Output is correct |
33 |
Correct |
7 ms |
11096 KB |
Output is correct |
34 |
Correct |
7 ms |
11100 KB |
Output is correct |
35 |
Correct |
6 ms |
11100 KB |
Output is correct |
36 |
Correct |
2 ms |
10844 KB |
Output is correct |
37 |
Correct |
6 ms |
11100 KB |
Output is correct |
38 |
Correct |
6 ms |
10984 KB |
Output is correct |
39 |
Correct |
7 ms |
11144 KB |
Output is correct |
40 |
Correct |
430 ms |
40740 KB |
Output is correct |
41 |
Correct |
466 ms |
40856 KB |
Output is correct |
42 |
Correct |
421 ms |
41928 KB |
Output is correct |
43 |
Correct |
345 ms |
40264 KB |
Output is correct |
44 |
Correct |
359 ms |
39520 KB |
Output is correct |
45 |
Correct |
529 ms |
39356 KB |
Output is correct |
46 |
Correct |
541 ms |
39360 KB |
Output is correct |
47 |
Correct |
526 ms |
39712 KB |
Output is correct |
48 |
Correct |
522 ms |
39536 KB |
Output is correct |
49 |
Correct |
508 ms |
39104 KB |
Output is correct |
50 |
Correct |
706 ms |
43756 KB |
Output is correct |
51 |
Correct |
723 ms |
44388 KB |
Output is correct |
52 |
Correct |
686 ms |
43452 KB |
Output is correct |
53 |
Correct |
738 ms |
37900 KB |
Output is correct |
54 |
Correct |
793 ms |
38300 KB |
Output is correct |
55 |
Correct |
759 ms |
38012 KB |
Output is correct |
56 |
Correct |
403 ms |
45444 KB |
Output is correct |
57 |
Correct |
384 ms |
45380 KB |
Output is correct |
58 |
Correct |
393 ms |
45524 KB |
Output is correct |
59 |
Correct |
374 ms |
45380 KB |
Output is correct |
60 |
Correct |
486 ms |
40136 KB |
Output is correct |
61 |
Correct |
464 ms |
41660 KB |
Output is correct |
62 |
Correct |
504 ms |
41164 KB |
Output is correct |
63 |
Correct |
301 ms |
42300 KB |
Output is correct |
64 |
Correct |
267 ms |
45056 KB |
Output is correct |
65 |
Correct |
371 ms |
41572 KB |
Output is correct |
66 |
Correct |
353 ms |
41416 KB |
Output is correct |
67 |
Correct |
2 ms |
10844 KB |
Output is correct |
68 |
Correct |
7 ms |
11200 KB |
Output is correct |
69 |
Correct |
7 ms |
11176 KB |
Output is correct |
70 |
Correct |
7 ms |
11240 KB |
Output is correct |
71 |
Correct |
466 ms |
45216 KB |
Output is correct |
72 |
Correct |
530 ms |
45496 KB |
Output is correct |
73 |
Correct |
415 ms |
38844 KB |
Output is correct |
74 |
Correct |
641 ms |
43964 KB |
Output is correct |
75 |
Correct |
606 ms |
44060 KB |
Output is correct |
76 |
Correct |
632 ms |
44548 KB |
Output is correct |
77 |
Correct |
454 ms |
43948 KB |
Output is correct |
78 |
Correct |
496 ms |
44248 KB |
Output is correct |
79 |
Correct |
444 ms |
44228 KB |
Output is correct |
80 |
Correct |
242 ms |
44348 KB |
Output is correct |
81 |
Correct |
223 ms |
44356 KB |
Output is correct |
82 |
Correct |
318 ms |
44256 KB |
Output is correct |
83 |
Correct |
290 ms |
44000 KB |
Output is correct |
84 |
Correct |
415 ms |
38112 KB |
Output is correct |
85 |
Correct |
378 ms |
34156 KB |
Output is correct |
86 |
Correct |
357 ms |
33704 KB |
Output is correct |
87 |
Correct |
532 ms |
39140 KB |
Output is correct |
88 |
Correct |
560 ms |
39272 KB |
Output is correct |
89 |
Correct |
554 ms |
39376 KB |
Output is correct |
90 |
Correct |
555 ms |
39084 KB |
Output is correct |
91 |
Correct |
556 ms |
39120 KB |
Output is correct |
92 |
Correct |
875 ms |
41560 KB |
Output is correct |
93 |
Correct |
770 ms |
43204 KB |
Output is correct |
94 |
Correct |
798 ms |
38108 KB |
Output is correct |
95 |
Correct |
808 ms |
37960 KB |
Output is correct |
96 |
Correct |
815 ms |
38128 KB |
Output is correct |
97 |
Correct |
828 ms |
38248 KB |
Output is correct |
98 |
Correct |
398 ms |
45384 KB |
Output is correct |
99 |
Correct |
394 ms |
45120 KB |
Output is correct |
100 |
Correct |
425 ms |
45252 KB |
Output is correct |
101 |
Correct |
419 ms |
45380 KB |
Output is correct |
102 |
Correct |
485 ms |
40064 KB |
Output is correct |
103 |
Correct |
504 ms |
40336 KB |
Output is correct |
104 |
Correct |
466 ms |
40408 KB |
Output is correct |
105 |
Correct |
299 ms |
40668 KB |
Output is correct |
106 |
Correct |
274 ms |
40912 KB |
Output is correct |
107 |
Correct |
352 ms |
41664 KB |
Output is correct |
108 |
Correct |
334 ms |
41256 KB |
Output is correct |