이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ordered_set tree<int, null_type,less_equal<int>, rb_tree_tag,tree_order_statistics_node_update>
// #pragma GCC optimize("Ofast,unroll-loops,fast-math")
// #pragma GCC target("popcnt,sse3,avx")
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll,ll> pll;
#define sz size()
#define ff first
#define ss second
#define all(a) a.begin(),a.end()
#define pb push_back
const int mod = ll(1e9)+7; //(b + (a%b)) % b (to mod -1%(10^9+7) correctly in c++ its -1 but its suppose to be 10^9+6
const ll MOD = 998244353; // (a%mod)*(binpow(b,mod-2,mod) = (a/b)%mod
const int N = ll(1e5)+100;
const int M = ll(2e5) + 100;
const long long inf = 5e18;
//const long double eps = 1e-15L;
ll lcm(ll a, ll b) { return (a / __gcd(a,b))*b; }
ll binpow(ll a, ll b, ll m) { ll res=1; a %= m; while(b>0){ if(b&1)res=(res * a) % m; a=(a * a) % m; b/=2; } return res%m;}
void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }
int n, m, q, u[N], v[N], d[N], t[N], x[N], y[N], par[N], siz[N], ans[N], changed[N];
vector<int> unchanged, ask, change, ex[N];
const int B = 300;
int findpar(int v) {
if(v == par[v]) return v;
return findpar(par[v]);
}
vector<pair<pair<int, int>, int> > dat;
void rollback(int s) {
while(dat.size() > s) {
int a = dat.back().ff.ff, b = dat.back().ff.ss, parb = dat.back().ss;
par[b] = parb;
siz[a] -= siz[b];
dat.pop_back();
}
}
void combine(int a, int b) {
a = findpar(a), b = findpar(b);
if(a != b) {
if(siz[a] < siz[b]) swap(a, b);
dat.pb({{a, b}, par[b]});
par[b] = a;
siz[a] += siz[b];
}
}
void Baizho() {
cin>>n>>m;
for(int i = 1; i <= m; i ++) cin>>u[i]>>v[i]>>d[i];
cin>>q;
for(int i = 1; i <= q; i ++) {
cin>>t[i]>>x[i]>>y[i];
}
for(int l = 1; l <= q; l += B) {
unchanged.clear(), ask.clear(), change.clear();
for(int i = 1; i <= n; i ++) {
par[i] = i;
siz[i] = 1;
}
for(int i = 1; i <= m; i ++) changed[i] = 0;
int r = min(q, l + B - 1);
for(int i = l; i <= r; i ++) {
if(t[i] == 1) changed[x[i]] = 1;
else ask.pb(i);
}
for(int i = 1; i <= m; i ++) {
if(!changed[i]) unchanged.pb(i);
else change.pb(i);
}
for(int i = l; i <= r; i ++) {
if(t[i] == 2) {
for(auto p : change) if(d[p] >= y[i]) ex[i].pb(p);
} else d[x[i]] = y[i];
}
sort(all(unchanged), [](int i, int j) {
return d[i] < d[j];
});
sort(all(ask), [](int i, int j) {
return y[i] > y[j];
});
for(auto i : ask) {
while(!unchanged.empty() && d[unchanged.back()] >= y[i]) {
// cout<<i<<" "<<unchanged.back()<<"\n";
combine(u[unchanged.back()], v[unchanged.back()]);
unchanged.pop_back();
}
// add the extra bridges which we changed in this block so they are a special case
int prev = dat.size();
for(auto p : ex[i]) {
// cout<<i<<" "<<p<<" yolo \n";
combine(u[p], v[p]);
}
ans[i] = siz[findpar(x[i])];
// cout<<i<<" "<<y[i]<<" "<<findpar(x[i])<<"\n";
rollback(prev);
}
}
for(int i = 1; i <= q; i ++) if(t[i] == 2) cout<<ans[i]<<"\n";
}
signed main() {
// Freopen("nondec");
ios_base::sync_with_stdio(false);
cin.tie(0);cout.tie(0);
// precalc();
int ttt = 1;
// cin>>ttt;
for(int i=1; i<=ttt; i++) {Baizho(); }
}
컴파일 시 표준 에러 (stderr) 메시지
bridges.cpp: In function 'void rollback(int)':
bridges.cpp:50:19: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<std::pair<int, int>, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
50 | while(dat.size() > s) {
| ~~~~~~~~~~~^~~
bridges.cpp: In function 'void Freopen(std::string)':
bridges.cpp:35:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
35 | void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bridges.cpp:35:76: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
35 | void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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