This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#ifdef ONLINE_JUDGE
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#endif
#include <bits/stdc++.h>
#define speed \
ios_base::sync_with_stdio(0); \
cin.tie(0); \
cout.tie(0);
#define precision \
cout.precision(30); \
cerr.precision(10);
#define ll long long
#define ld long double
#define pb(x) push_back(x)
#define sz(x) (int)x.size()
#define mp(x, y) make_pair(x, y)
#define all(x) x.begin(), x.end()
#define pc(x) __builtin_popcount(x)
#define pcll(x) __builtin_popcountll(x)
#define F first
#define S second
using namespace std;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
void ioi(string name) {
freopen((name + ".in").c_str(), "r", stdin);
freopen((name + ".out").c_str(), "w", stdout);
}
const int bl = 1300;
int n, m, q, p[100005], sz[100005], a[100005], b[100005], c[100005],
type[100005], X[100005], Y[100005], w[100005], res[100005];
vector<int> stk, upd[100005];
int get(int v) {
while (v != p[v]) v = p[v];
return v;
}
void unt(int u, int v) {
if ((u = get(u)) == (v = get(v))) return;
if (sz[u] < sz[v]) swap(u, v);
sz[u] += sz[v], p[v] = u;
stk.pb(v);
}
void roll(int old_sz) {
while (sz(stk) > old_sz) {
int v = stk.back();
stk.pop_back();
sz[p[v]] -= sz[v], p[v] = v;
}
}
int main() {
speed;
precision;
// code
cin >> n >> m;
for (int i = 1; i <= m; i++) cin >> a[i] >> b[i] >> c[i];
cin >> q;
for (int I = 1, h = 1; I <= q; I++, h++) {
cin >> type[h] >> X[h] >> Y[h];
if (!(h % bl) || I == q) {
stk.clear();
for (int i = 1; i <= n; i++) sz[i] = 1, p[i] = i;
for (int i = 1; i <= m; i++) upd[i].clear(), w[i] = 0;
for (int i = 1; i <= h; i++)
if (type[i] == 1) upd[X[i]].pb(i), w[X[i]] = 1;
vector<pair<int, int>> edge;
vector<int> later;
for (int i = 1; i <= m; i++) {
if (!w[i])
edge.pb(mp(c[i], i));
else
later.pb(i);
}
sort(all(edge));
vector<pair<pair<int, int>, int>> ask;
for (int i = 1; i <= h; i++)
if (type[i] == 2) ask.pb(mp(mp(Y[i], i), X[i]));
sort(all(ask));
for (int i = sz(ask) - 1, j = sz(edge) - 1; i >= 0; i--) {
while (j >= 0 && ask[i].F.F <= edge[j].F) {
unt(a[edge[j].S], b[edge[j].S]);
j--;
}
int old_sz = sz(stk);
for (auto k : later) {
int kek = c[k];
for (auto to : upd[k]) {
if (to > ask[i].F.S) break;
kek = Y[to];
}
if (ask[i].F.F <= kek) unt(a[k], b[k]);
}
res[ask[i].F.S] = sz[get(ask[i].S)];
roll(old_sz);
}
for (int i = 1; i <= h; i++)
if (type[i] == 1) c[X[i]] = Y[i];
for (int i = 1; i <= h; i++)
if (type[i] == 2) cout << res[i] << "\n";
h = 0;
}
}
// endl
#ifndef ONLINE_JUDGE
cerr << "\nTime elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
#endif
return 0;
}
Compilation message (stderr)
bridges.cpp: In function 'void ioi(std::string)':
bridges.cpp:26:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
26 | freopen((name + ".in").c_str(), "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bridges.cpp:27:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
27 | freopen((name + ".out").c_str(), "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |