#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef long double ld;
typedef complex<ld> cd;
typedef pair<int, int> pi;
typedef pair<ll,ll> pl;
typedef pair<ld,ld> pd;
typedef vector<int> vi;
typedef vector<ld> vd;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
typedef vector<cd> vcd;
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>;
#define FOR(i, a, b) for (int i=a; i<(b); i++)
#define F0R(i, a) for (int i=0; i<(a); i++)
#define FORd(i,a,b) for (int i = (b)-1; i >= a; i--)
#define F0Rd(i,a) for (int i = (a)-1; i >= 0; i--)
#define sz(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()
const int MOD = 1000000007;
const ll INF = 1e18;
const int MX = 70010;
vi adj[MX];
set<array<int,3>> ADJ[MX];
priority_queue<int> mx[MX], mn[MX];
int N;
bool done[MX];
map<int,int> m;
vi rm;
void merge(priority_queue<int>& a, priority_queue<int>& b) {
if (sz(a) < sz(b)) swap(a,b);
while (sz(b)) a.push(b.top()), b.pop();
}
void del(priority_queue<int>& a) {
while (sz(a) > 1) {
int x = a.top(); a.pop();
if (a.top() == x) a.pop();
else {
a.push(x);
break;
}
}
}
void merge(int a, int b) {
// cout << "TT " << sz(mn[a]) << " " << sz(mn[b]) << "\n";
merge(mn[a],mn[b]);
//cout << "TT " << sz(mn[a]) << " " << sz(mn[b]) << "\n";
del(mn[a]);
merge(mx[a],mx[b]);
del(mx[a]);
}
void dfs(int x, int p) {
for (int i: adj[x]) if (i != p) {
dfs(i,x);
// cout << "OH " << i << " " << x << "\n";
merge(x,i);
}
int lo = (sz(mn[x]) ? mn[x].top() : -MOD);
int hi = (sz(mx[x]) ? -mx[x].top() : MOD);
if (p) {
ADJ[m[lo]].insert({m[hi],x,p});
ADJ[m[hi]].insert({m[lo],x,p});
}
}
int main() {
ios_base::sync_with_stdio(0); cin.tie(0);
cin >> N;
F0R(i,N-1) {
int A = rand() % (i+1)+1, B = i+2;
// int A,B; cin >> A >> B;
adj[A].pb(B), adj[B].pb(A);
}
int K; cin >> K;
m[MOD] = 0, m[-MOD] = 1;
rm.pb(MOD);
rm.pb(-MOD);
F0R(i,K) {
char c; cin >> c;
int x,y,z; cin >> x >> y >> z;
if (c == 'M') mx[x].push(-z), mx[y].push(-z);
else mn[x].push(z), mn[y].push(z);
m[z] = i+2;
rm.pb(z);
}
dfs(1,0);
set<pi> S;
FOR(i,2,K+2) S.insert({sz(adj[i]),i});
done[0] = 1;
while (sz(S)) {
auto a = *S.begin(); S.erase(a); done[a.s] = 1;
auto it = *ADJ[a.s].begin(); ADJ[a.s].erase(it);
if (!done[it[0]]) S.erase({sz(ADJ[it[0]]),it[0]});
ADJ[it[0]].erase({a.s,it[1],it[2]});
if (!done[it[0]]) S.insert({sz(ADJ[it[0]]),it[0]});
cout << it[1] << " " << it[2] << " " << rm[a.s] << "\n";
}
F0R(i,K+2) for (auto a: ADJ[i]) if (a[0] >= i)
cout << a[1] << " " << a[2] << " " << rm[i] << "\n";
}
/* Look for:
* the exact constraints (multiple sets are too slow for n=10^6 :( )
* special cases (n=1?)
* overflow (ll vs int?)
* array bounds
*/
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
10 ms |
9596 KB |
Integer 0 violates the range [1, 20] |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
450 ms |
28444 KB |
Integer 0 violates the range [1, 70000] |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
325 ms |
28444 KB |
not a valid edge |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
10 ms |
9596 KB |
Integer 0 violates the range [1, 20] |
| 2 |
Halted |
0 ms |
0 KB |
- |
