結果
| 問題 |
No.2295 Union Path Query (Medium)
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2023-05-05 23:18:20 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,694 bytes |
| コンパイル時間 | 2,221 ms |
| コンパイル使用メモリ | 170,640 KB |
| 実行使用メモリ | 84,992 KB |
| 最終ジャッジ日時 | 2024-11-23 12:05:43 |
| 合計ジャッジ時間 | 22,918 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 2 WA * 51 |
ソースコード
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll mod = 998244353;
ll t = 1,n,m,k,q,l,r,a,b,c,u,v,x,y,z,o,X,hd[200009],tot,dep[200009],anc[200009][20],dis[200009][20],rt[200009],id[200009],sz[200009],ans[200009];
string s;
struct st{ll x,y,z; /*bool operator < (const st &a) const{return x < a.x;};*/}eg[400009];
void addedge(ll u,ll v,ll w){eg[++ tot] = (st){v,hd[u],w},hd[u] = tot;}
bool cmp(const st &a,const st &b){return a.x < b.x;}
inline ll read(){
ll s = 0,w = 1;
char ch = getchar();
while (ch > '9' || ch < '0'){ if (ch == '-') w = -1; ch = getchar();}
while (ch <= '9' && ch >= '0') s = (s << 1) + (s << 3) + (ch ^ 48),ch = getchar();
return s * w;
}
ll qp(ll x,ll y){
ll a = 1,b = x;
while (y){
if (y & 1) a = a * b % mod;
b = b * b % mod,y >>= 1;
}
return a;
}
inline void add(ll &x,ll y){x += y; if (x >= mod) x -= mod;}
ll find(ll x){return x == id[x] ? x : id[x] = find(id[x]);}
void dfs(ll u,ll fa,ll rt){
for (ll i = 1;i < 20;i += 1) anc[u][i] = anc[anc[u][i - 1]][i - 1];
for (ll i = 1;i < 20;i += 1) dis[u][i] = max(dis[u][i - 1],dis[anc[u][i - 1]][i - 1]);
for (ll i = hd[u];i;i = eg[i].y){
ll v = eg[i].x;
if (v == fa) continue;
anc[v][0] = u,dis[v][0] = eg[i].z,dfs(v,u,rt);
}
}
void merge(ll x,ll y,ll z){
ll qwq = find(x),awa = find(y);
if (qwq == awa) return;
if (sz[qwq] > sz[awa]) swap(x,y),swap(qwq,awa);
id[qwq] = awa,ans[awa] += z * sz[qwq] % mod * sz[awa] % mod,sz[awa] += sz[qwq],ans[awa] %= mod;
dep[x] = dep[y] + 1,anc[x][0] = y,dis[x][0] = z,addedge(x,y,z),addedge(y,x,z),dfs(x,y,awa);
}
ll query(ll x,ll y){
ll ans = 0;
for (ll i = 19;i >= 0;i -= 1){
if (!anc[x][i]) continue;
if (dep[anc[x][i]] < dep[y]) continue;
ans = max(ans,dis[x][i]),x = anc[x][i];
}
for (ll i = 19;i >= 0;i -= 1){
if (!anc[y][i]) continue;
if (dep[anc[y][i]] < dep[x]) continue;
ans = max(ans,dis[y][i]),y = anc[y][i];
}
for (ll i = 19;i >= 0;i -= 1){
if (anc[x][i] == anc[y][i]) continue;
ans = max(ans,dis[x][i]),ans = max(ans,dis[y][i]);
x = anc[x][i],y = anc[y][i];
}
if (x != y) ans = max(ans,dis[x][0]),ans = max(ans,dis[y][0]);
return ans;
}
int main(){//t = read();
while (t --){
n = read(),X = read() + 1,q = read();
for (ll i = 1;i <= n;i += 1){
rt[i] = id[i] = i,sz[i] = 1;
}
while (q --){
o = read();
if (o == 1){
x = read() + 1,y = read();
merge(x,X,y);
}
if (o == 2){
x = read() + 1,y = read() + 1;
if (find(x) != find(y)) puts("-1");
else{
ll qwq = query(x,y);
X += qwq;
printf("%lld\n",qwq);
}
}
if (o == 3){
x = read() + 1;
printf("%lld\n",ans[find(x)]);
}
if (o == 4) X += read();
X = (X + n - 1) % n + 1;
}
}
return 0;
}