#include <bits/stdc++.h>
using namespace std;
const int MAX = (1e5)+1;
int n, m;
vector<int> g[MAX];
vector<tuple<int,int,int> > paths[MAX];
int d[MAX];
vector<int> anc[MAX];
void init_lca(int u, int p) {
for(int v: g[u]) if(v != p) {
d[v] = d[u] + 1;
anc[v].push_back(u);
for(int j = 0; 1 << j+1 <= d[v]; j++)
anc[v].push_back(anc[anc[v][j]][j]);
init_lca(v, u);
}
}
int query_lca(int u, int v) {
if(d[u] > d[v]) {
int diff = d[u] - d[v];
for(int j = anc[u].size()-1; j >= 0; j--) if(diff >> j & 1) u = anc[u][j];
} else if(d[u] < d[v]) {
int diff = d[v] - d[u];
for(int j = anc[v].size()-1; j >= 0; j--) if(diff >> j & 1) v = anc[v][j];
}
if(u == v) return u;
for(int j = anc[u].size()-1; j >= 0; j--) if(j < anc[u].size() && anc[u][j] != anc[v][j]) {
u = anc[u][j];
v = anc[v][j];
}
return anc[u][0];
}
int dp[MAX], sum[MAX], c[MAX];
map<int, int> mpf[MAX];
void dfs(int u, int p) {
for(int v: g[u]) if(v != p) {
dfs(v, u);
sum[u] += dp[v];
if(mpf[v].size() > mpf[u].size()) {
mpf[u].swap(mpf[v]);
swap(c[u], c[v]);
}
for(auto pp: mpf[v]) mpf[u][pp.first] = pp.second + c[v] - c[u];
}
dp[u] = sum[u];
for(auto path: paths[u]) {
int a, b, w;
tie(a, b, w) = path;
int down1 = (a != u ? mpf[u][a] + c[u] : 0);
int down2 = (b != u ? mpf[u][b] + c[u] : 0);
dp[u] = max(sum[u] + down1 + down2 + w, dp[u]);
}
mpf[u][u] = -c[u];
c[u] += sum[u] - dp[u];
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
cin >> n;
bool ok = true, ok2 = true;
for(int i = 1, u, v; i < n; i++) {
cin >> u >> v; --u; --v;
if(u != v - 1) ok = false;
g[u].push_back(v);
g[v].push_back(u);
}
init_lca(0, -1);
cin >> m;
for(int i = 0, u, v, w; i < m; i++) {
cin >> u >> v >> w; --u; --v;
if(w != 1) ok2 = false;
paths[query_lca(u, v)].emplace_back(u, v, w);
}
dfs(0, -1);
cout << dp[0];
}
Compilation message
election_campaign.cpp: In function 'void init_lca(int, int)':
election_campaign.cpp:15:24: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
for(int j = 0; 1 << j+1 <= d[v]; j++)
~^~
election_campaign.cpp: In function 'int query_lca(int, int)':
election_campaign.cpp:29:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j = anc[u].size()-1; j >= 0; j--) if(j < anc[u].size() && anc[u][j] != anc[v][j]) {
~~^~~~~~~~~~~~~~~
election_campaign.cpp: In function 'int main()':
election_campaign.cpp:64:7: warning: variable 'ok' set but not used [-Wunused-but-set-variable]
bool ok = true, ok2 = true;
^~
election_campaign.cpp:64:18: warning: variable 'ok2' set but not used [-Wunused-but-set-variable]
bool ok = true, ok2 = true;
^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
13 ms |
12152 KB |
Output is correct |
| 2 |
Correct |
16 ms |
12272 KB |
Output is correct |
| 3 |
Correct |
15 ms |
12272 KB |
Output is correct |
| 4 |
Correct |
16 ms |
12364 KB |
Output is correct |
| 5 |
Correct |
426 ms |
49692 KB |
Output is correct |
| 6 |
Correct |
163 ms |
49692 KB |
Output is correct |
| 7 |
Correct |
487 ms |
49692 KB |
Output is correct |
| 8 |
Correct |
348 ms |
49692 KB |
Output is correct |
| 9 |
Correct |
426 ms |
49692 KB |
Output is correct |
| 10 |
Correct |
404 ms |
49692 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
14 ms |
49692 KB |
Output is correct |
| 2 |
Correct |
12 ms |
49692 KB |
Output is correct |
| 3 |
Correct |
14 ms |
49692 KB |
Output is correct |
| 4 |
Correct |
412 ms |
49692 KB |
Output is correct |
| 5 |
Correct |
449 ms |
49692 KB |
Output is correct |
| 6 |
Correct |
322 ms |
49692 KB |
Output is correct |
| 7 |
Correct |
317 ms |
49692 KB |
Output is correct |
| 8 |
Correct |
496 ms |
49692 KB |
Output is correct |
| 9 |
Correct |
325 ms |
49692 KB |
Output is correct |
| 10 |
Correct |
481 ms |
49692 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
14 ms |
49692 KB |
Output is correct |
| 2 |
Correct |
12 ms |
49692 KB |
Output is correct |
| 3 |
Correct |
14 ms |
49692 KB |
Output is correct |
| 4 |
Correct |
412 ms |
49692 KB |
Output is correct |
| 5 |
Correct |
449 ms |
49692 KB |
Output is correct |
| 6 |
Correct |
322 ms |
49692 KB |
Output is correct |
| 7 |
Correct |
317 ms |
49692 KB |
Output is correct |
| 8 |
Correct |
496 ms |
49692 KB |
Output is correct |
| 9 |
Correct |
325 ms |
49692 KB |
Output is correct |
| 10 |
Correct |
481 ms |
49692 KB |
Output is correct |
| 11 |
Correct |
25 ms |
49692 KB |
Output is correct |
| 12 |
Correct |
457 ms |
49692 KB |
Output is correct |
| 13 |
Correct |
493 ms |
49692 KB |
Output is correct |
| 14 |
Correct |
379 ms |
49692 KB |
Output is correct |
| 15 |
Correct |
373 ms |
49692 KB |
Output is correct |
| 16 |
Correct |
347 ms |
49692 KB |
Output is correct |
| 17 |
Correct |
479 ms |
49692 KB |
Output is correct |
| 18 |
Correct |
363 ms |
49692 KB |
Output is correct |
| 19 |
Correct |
338 ms |
49692 KB |
Output is correct |
| 20 |
Correct |
340 ms |
49692 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
615 ms |
53288 KB |
Output is correct |
| 2 |
Correct |
362 ms |
53288 KB |
Output is correct |
| 3 |
Correct |
705 ms |
53288 KB |
Output is correct |
| 4 |
Correct |
546 ms |
53288 KB |
Output is correct |
| 5 |
Correct |
649 ms |
53288 KB |
Output is correct |
| 6 |
Correct |
507 ms |
53288 KB |
Output is correct |
| 7 |
Correct |
584 ms |
53288 KB |
Output is correct |
| 8 |
Correct |
647 ms |
53288 KB |
Output is correct |
| 9 |
Correct |
285 ms |
53288 KB |
Output is correct |
| 10 |
Correct |
650 ms |
53288 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
13 ms |
12152 KB |
Output is correct |
| 2 |
Correct |
16 ms |
12272 KB |
Output is correct |
| 3 |
Correct |
15 ms |
12272 KB |
Output is correct |
| 4 |
Correct |
16 ms |
12364 KB |
Output is correct |
| 5 |
Correct |
426 ms |
49692 KB |
Output is correct |
| 6 |
Correct |
163 ms |
49692 KB |
Output is correct |
| 7 |
Correct |
487 ms |
49692 KB |
Output is correct |
| 8 |
Correct |
348 ms |
49692 KB |
Output is correct |
| 9 |
Correct |
426 ms |
49692 KB |
Output is correct |
| 10 |
Correct |
404 ms |
49692 KB |
Output is correct |
| 11 |
Correct |
15 ms |
53288 KB |
Output is correct |
| 12 |
Correct |
14 ms |
53288 KB |
Output is correct |
| 13 |
Correct |
15 ms |
53288 KB |
Output is correct |
| 14 |
Correct |
16 ms |
53288 KB |
Output is correct |
| 15 |
Correct |
15 ms |
53288 KB |
Output is correct |
| 16 |
Correct |
16 ms |
53288 KB |
Output is correct |
| 17 |
Correct |
14 ms |
53288 KB |
Output is correct |
| 18 |
Correct |
16 ms |
53288 KB |
Output is correct |
| 19 |
Correct |
15 ms |
53288 KB |
Output is correct |
| 20 |
Correct |
16 ms |
53288 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
13 ms |
12152 KB |
Output is correct |
| 2 |
Correct |
16 ms |
12272 KB |
Output is correct |
| 3 |
Correct |
15 ms |
12272 KB |
Output is correct |
| 4 |
Correct |
16 ms |
12364 KB |
Output is correct |
| 5 |
Correct |
426 ms |
49692 KB |
Output is correct |
| 6 |
Correct |
163 ms |
49692 KB |
Output is correct |
| 7 |
Correct |
487 ms |
49692 KB |
Output is correct |
| 8 |
Correct |
348 ms |
49692 KB |
Output is correct |
| 9 |
Correct |
426 ms |
49692 KB |
Output is correct |
| 10 |
Correct |
404 ms |
49692 KB |
Output is correct |
| 11 |
Correct |
14 ms |
49692 KB |
Output is correct |
| 12 |
Correct |
12 ms |
49692 KB |
Output is correct |
| 13 |
Correct |
14 ms |
49692 KB |
Output is correct |
| 14 |
Correct |
412 ms |
49692 KB |
Output is correct |
| 15 |
Correct |
449 ms |
49692 KB |
Output is correct |
| 16 |
Correct |
322 ms |
49692 KB |
Output is correct |
| 17 |
Correct |
317 ms |
49692 KB |
Output is correct |
| 18 |
Correct |
496 ms |
49692 KB |
Output is correct |
| 19 |
Correct |
325 ms |
49692 KB |
Output is correct |
| 20 |
Correct |
481 ms |
49692 KB |
Output is correct |
| 21 |
Correct |
25 ms |
49692 KB |
Output is correct |
| 22 |
Correct |
457 ms |
49692 KB |
Output is correct |
| 23 |
Correct |
493 ms |
49692 KB |
Output is correct |
| 24 |
Correct |
379 ms |
49692 KB |
Output is correct |
| 25 |
Correct |
373 ms |
49692 KB |
Output is correct |
| 26 |
Correct |
347 ms |
49692 KB |
Output is correct |
| 27 |
Correct |
479 ms |
49692 KB |
Output is correct |
| 28 |
Correct |
363 ms |
49692 KB |
Output is correct |
| 29 |
Correct |
338 ms |
49692 KB |
Output is correct |
| 30 |
Correct |
340 ms |
49692 KB |
Output is correct |
| 31 |
Correct |
615 ms |
53288 KB |
Output is correct |
| 32 |
Correct |
362 ms |
53288 KB |
Output is correct |
| 33 |
Correct |
705 ms |
53288 KB |
Output is correct |
| 34 |
Correct |
546 ms |
53288 KB |
Output is correct |
| 35 |
Correct |
649 ms |
53288 KB |
Output is correct |
| 36 |
Correct |
507 ms |
53288 KB |
Output is correct |
| 37 |
Correct |
584 ms |
53288 KB |
Output is correct |
| 38 |
Correct |
647 ms |
53288 KB |
Output is correct |
| 39 |
Correct |
285 ms |
53288 KB |
Output is correct |
| 40 |
Correct |
650 ms |
53288 KB |
Output is correct |
| 41 |
Correct |
15 ms |
53288 KB |
Output is correct |
| 42 |
Correct |
14 ms |
53288 KB |
Output is correct |
| 43 |
Correct |
15 ms |
53288 KB |
Output is correct |
| 44 |
Correct |
16 ms |
53288 KB |
Output is correct |
| 45 |
Correct |
15 ms |
53288 KB |
Output is correct |
| 46 |
Correct |
16 ms |
53288 KB |
Output is correct |
| 47 |
Correct |
14 ms |
53288 KB |
Output is correct |
| 48 |
Correct |
16 ms |
53288 KB |
Output is correct |
| 49 |
Correct |
15 ms |
53288 KB |
Output is correct |
| 50 |
Correct |
16 ms |
53288 KB |
Output is correct |
| 51 |
Correct |
601 ms |
53288 KB |
Output is correct |
| 52 |
Correct |
425 ms |
53288 KB |
Output is correct |
| 53 |
Correct |
760 ms |
53288 KB |
Output is correct |
| 54 |
Correct |
399 ms |
53288 KB |
Output is correct |
| 55 |
Correct |
663 ms |
63620 KB |
Output is correct |
| 56 |
Correct |
500 ms |
63620 KB |
Output is correct |
| 57 |
Correct |
528 ms |
63620 KB |
Output is correct |
| 58 |
Correct |
531 ms |
63620 KB |
Output is correct |
| 59 |
Correct |
591 ms |
75028 KB |
Output is correct |
| 60 |
Correct |
360 ms |
75028 KB |
Output is correct |
| 61 |
Correct |
608 ms |
75028 KB |
Output is correct |
| 62 |
Correct |
436 ms |
75028 KB |
Output is correct |
| 63 |
Correct |
537 ms |
85272 KB |
Output is correct |
| 64 |
Correct |
375 ms |
85272 KB |
Output is correct |
| 65 |
Correct |
666 ms |
85272 KB |
Output is correct |
| 66 |
Correct |
436 ms |
85272 KB |
Output is correct |
| 67 |
Correct |
647 ms |
96844 KB |
Output is correct |
| 68 |
Correct |
551 ms |
96844 KB |
Output is correct |
| 69 |
Correct |
570 ms |
96844 KB |
Output is correct |
| 70 |
Correct |
464 ms |
96844 KB |
Output is correct |
