| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 879738 |
2023-11-28T03:33:44 Z |
marvinthang |
Toll (APIO13_toll) |
C++17 |
|
0 ms |
344 KB |
/*************************************
* author: marvinthang *
* created: 28.11.2023 09:58:49 *
*************************************/
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define left ___left
#define right ___right
#define TIME (1.0 * clock() / CLOCKS_PER_SEC)
#define MASK(i) (1LL << (i))
#define BIT(x, i) ((x) >> (i) & 1)
#define __builtin_popcount __builtin_popcountll
#define ALL(v) (v).begin(), (v).end()
#define REP(i, n) for (int i = 0, _n = (n); i < _n; ++i)
#define REPD(i, n) for (int i = (n); i-- > 0; )
#define FOR(i, a, b) for (int i = (a), _b = (b); i < _b; ++i)
#define FORD(i, b, a) for (int i = (b), _a = (a); --i >= _a; )
#define FORE(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i)
#define FORDE(i, b, a) for (int i = (b), _a = (a); i >= _a; --i)
#define scan_op(...) istream & operator >> (istream &in, __VA_ARGS__ &u)
#define print_op(...) ostream & operator << (ostream &out, const __VA_ARGS__ &u)
#ifdef LOCAL
#include "debug.h"
#else
#define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
#define DB(...) 23
#define db(...) 23
#define debug(...) 23
#endif
template <class U, class V> scan_op(pair <U, V>) { return in >> u.first >> u.second; }
template <class T> scan_op(vector <T>) { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; }
template <class U, class V> print_op(pair <U, V>) { return out << '(' << u.first << ", " << u.second << ')'; }
template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")"; else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); }
template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); }
template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; }
// index from 0 to n
struct DisjointSet {
vector <int> par;
DisjointSet(int n = 0): par(n + 1, -1) {}
void reset(void) { fill(par.begin(), par.end(), -1); }
void resize(int n) { par.assign(n + 1, -1); }
bool connected(int u, int v) { return find(u) == find(v); }
bool isRoot(int u) { return par[u] < 0; }
int size(int u) { return -par[find(u)]; }
int find(int u) { return par[u] < 0 ? u : par[u] = find(par[u]); }
bool join(int u, int v) {
if ((u = find(u)) == (v = find(v))) return false;
if (par[u] > par[v]) swap(u, v);
par[u] += par[v]; par[v] = u;
return true;
}
};
using DSU = DisjointSet;
// end of template
void process(void) {
int n, m, k; cin >> n >> m >> k;
vector <array <int, 3>> edges(m + k);
FOR(i, k, m + k) cin >> edges[i][1] >> edges[i][2] >> edges[i][0];
REP(i, k) REP(j, 2) cin >> edges[i][j + 1];
vector <int> p(n); cin >> p;
sort(k + ALL(edges));
DSU dsu(n);
vector <bool> on_mst(m + k);
REP(i, m + k) {
REP(j, 2) --edges[i][j + 1];
// cout << edges[i][1] << ' ' << edges[i][2] << '\n';
on_mst[i] = dsu.join(edges[i][1], edges[i][2]);
}
dsu.reset();
FOR(i, k, m + k) if (on_mst[i]) dsu.join(edges[i][1], edges[i][2]);
// cout << on_mst << '\n';
vector <int> id(n, -1);
int sz = 0;
REP(i, n) {
int p = dsu.find(i);
if (id[p] < 0) id[p] = sz++;
id[i] = id[p];
}
vector <long long> cnt(sz);
REP(i, n) cnt[id[i]] += p[i];
vector <array <int, 3>> imp_edges;
int ne = k;
FOR(i, k, m + k) if (!on_mst[i] && dsu.join(edges[i][1], edges[i][2])) edges[ne++] = edges[i];
REP(i, ne) edges[i][1] = id[edges[i][1]], edges[i][2] = id[edges[i][2]];
dsu.resize(sz);
vector <vector <int>> adj(sz);
vector <int> depth(sz), par(sz), mi(sz), tree_size(sz);
auto solve = [&] (int mask) {
REP(i, sz) {
adj[i].clear();
depth[i] = par[i] = 0;
mi[i] = (int) 1e6;
}
dsu.reset();
REP(i, k) if (BIT(mask, i)) {
int u = edges[i][1], v = edges[i][2];
if (!dsu.join(u, v)) return 0LL;
adj[u].push_back(i);
adj[v].push_back(i);
}
vector <int> rem_edge;
FOR(i, k, ne) {
int u = edges[i][1], v = edges[i][2];
if (dsu.join(u, v)) {
adj[u].push_back(i);
adj[v].push_back(i);
} else rem_edge.push_back(i);
}
function<void(int)> dfs = [&] (int u) {
tree_size[u] = cnt[u];
for (int i: adj[u]) {
int v = edges[i][1] ^ edges[i][2] ^ u;
if (v != par[u]) {
par[v] = u;
depth[v] = depth[u] + 1;
dfs(v);
tree_size[u] += tree_size[v];
}
}
};
dfs(0);
for (int i: rem_edge) {
int u = edges[i][1], v = edges[i][2], w = edges[i][0];
while (u != v) {
if (depth[u] < depth[v]) swap(u, v);
mi[u] = min(mi[u], w);
u = par[u];
}
}
long long cur = 0;
function <void(int)> dfs2 = [&] (int u) {
for (int i: adj[u]) {
int v = edges[i][1] ^ edges[i][2] ^ u;
if (v != par[u]) {
if (i < k) cur += mi[v] * tree_size[v];
dfs2(v);
}
}
};
dfs2(0);
return cur;
};
long long res = 0;
FOR(mask, 1, MASK(k)) res = max(res, solve(mask));
cout << res << '\n';
}
int main(void) {
ios_base::sync_with_stdio(false); cin.tie(nullptr); // cout.tie(nullptr);
file("toll");
// int t; cin >> t; while (t--)
process();
// cerr << "Time elapsed: " << TIME << " s.\n";
return (0^0);
}
Compilation message
toll.cpp: In function 'int main()':
toll.cpp:30:61: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
30 | #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
toll.cpp:159:2: note: in expansion of macro 'file'
159 | file("toll");
| ^~~~
toll.cpp:30:94: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
30 | #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
toll.cpp:159:2: note: in expansion of macro 'file'
159 | file("toll");
| ^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
344 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
344 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
344 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
344 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
344 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
