# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
978564 |
2024-05-09T10:50:34 Z |
LOLOLO |
Race (IOI11_race) |
C++ |
|
0 ms |
0 KB |
#include "race.h"
#include <bits/stdc++.h>
#define ll long long
using namespace std;
#define f first
#define s second
#define pb push_back
#define ep emplace
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define uniquev(v) sort(all(v)), (v).resize(unique(all(v)) - (v).begin())
#define mem(f,x) memset(f , x , sizeof(f))
#define sz(x) (int)(x).size()
#define __lcm(a, b) (1ll * ((a) / __gcd((a), (b))) * (b))
#define mxx *max_element
#define mnn *min_element
#define cntbit(x) __builtin_popcountll(x)
#define len(x) (int)(x.length())
const int N = 1e6 + 10;
vector <pair <int, int>> ed[N];
ll d1[N], d2[N], k;
ll ans = 1e9;
map <ll, int> mp[N];
// x + y - 2 * v = k
// x + y = k + 2 * v
void dfs(int u, int v) {
mp[u][d1[u]] = d2[u];
ll tot = k + 2 * d1[u];
for (auto x : ed[u]) {
if (x.f == v)
continue;
d2[x.f] = d2[u] + 1;
d1[x.f] = d1[u] + x.s;
dfs(x.f, u);
if (sz(mp[u]) < sz(mp[x.f])) {
swap(mp[u], mp[x.f]);
}
for (auto el : mp[x.f]) {
auto it = mp[u].find(tot - el.f);
if (it != mp[u].end()) {
ans = min(ans, it -> s + el.s - d2[u] * 2);
}
}
}
}
int best_path(int n, ll len, int H[][2], int L[]) {
k = len;
for (int i = 0; i < n - 1; i++) {
ed[H[i][0]].pb({H[i][1], L[i]});
ed[H[i][1]].pb({H[i][0], L[i]});
}
dfs(0, 0);
if (ans > n)
ans = -1;
return ans;
}
int main() {
}
Compilation message
/usr/bin/ld: /tmp/ccHUh8KL.o: in function `main':
race.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccZE1W0O.o:grader.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccZE1W0O.o: in function `main':
grader.cpp:(.text.startup+0x28): undefined reference to `best_path(int, int, int (*) [2], int*)'
collect2: error: ld returned 1 exit status