結果
問題 | No.1030 だんしんぐぱーりない |
ユーザー | HIR180 |
提出日時 | 2020-04-17 21:49:32 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 334 ms / 2,000 ms |
コード長 | 3,431 bytes |
コンパイル時間 | 3,673 ms |
コンパイル使用メモリ | 226,620 KB |
最終ジャッジ日時 | 2025-01-09 19:54:51 |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 40 |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:141:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 141 | scanf("%d%d%d",&n,&k,&q); | ~~~~~^~~~~~~~~~~~~~~~~~~ main.cpp:143:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 143 | scanf("%d", &mx[i]); | ~~~~~^~~~~~~~~~~~~~ main.cpp:146:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 146 | scanf("%d", &aa[i]); | ~~~~~^~~~~~~~~~~~~~ main.cpp:149:32: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 149 | int a, b; scanf("%d%d", &a, &b); | ~~~~~^~~~~~~~~~~~~~~~ main.cpp:159:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 159 | int ty; scanf("%d", &ty); | ~~~~~^~~~~~~~~~~ main.cpp:161:40: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 161 | int a, b; scanf("%d%d", &a, &b); a--; | ~~~~~^~~~~~~~~~~~~~~~ main.cpp:165:40: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 165 | int a, b; scanf("%d%d", &a, &b); | ~~~~~^~~~~~~~~~~~~~~~
ソースコード
//Let's join Kaede Takagaki Fan Club !! #include <bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> using namespace std; typedef long long ll; typedef pair<int,int> P; typedef pair<int,P> P1; typedef pair<P,P> P2; #define pu push #define pb push_back #define mp make_pair #define eps 1e-7 #define INF 1000000000 #define fi first #define sc second #define rep(i,x) for(int i=0;i<x;i++) #define repn(i,x) for(int i=1;i<=x;i++) #define SORT(x) sort(x.begin(),x.end()) #define ERASE(x) x.erase(unique(x.begin(),x.end()),x.end()) #define POSL(x,v) (lower_bound(x.begin(),x.end(),v)-x.begin()) #define POSU(x,v) (upper_bound(x.begin(),x.end(),v)-x.begin()) #define all(x) x.begin(),x.end() template<class T> void dmp(T a){ rep(i,a.size()) cout << a[i] << " "; cout << endl; } template<class T> bool chmax(T&a, T b){ if(a < b){ a = b; return 1; } return 0; } template<class T> bool chmin(T&a, T b){ if(a > b){ a = b; return 1; } return 0; } template<class T> void g(T &a){ cin >> a; } template<class T> void o(const T &a,bool space=false){ cout << a << (space?' ':'\n'); } //ios::sync_with_stdio(false); const int mod = 1000000007; template<class T> void add(T&a,T b){ a+=b; if(a >= mod) a-=mod; } #define SZ 100005 int n, k, q; int mx[100005]; P ar[SZ*2]={}; int pos[SZ]={},id=0,up[SZ],dep[SZ]; P mn[20][SZ*2]={}; int sz[SZ*2]={}; vector<int>edge[SZ]; struct LCA{ //SZは元の木の頂点数より大 //外部でedge[]に隣接状況を持って置く必要あり void dfs(int v,int u,int d){ pos[v] = id; up[v] = u; dep[v] = d; ar[id++] = mp(d,v); for(int i=0;i<edge[v].size();i++){ if(edge[v][i] == u) continue; dfs(edge[v][i],v,d+1); ar[id++] = mp(d,v); } } void prepare(){ dfs(1,-1,0); for(int i=0;i<id;i++) mn[0][i] = ar[i]; for(int j=0;j<19;j++){ for(int i=0;i<id;i++){ if(i+(1<<j) >= id) mn[j+1][i] = mn[j][i]; else mn[j+1][i] = min(mn[j][i], mn[j][i+(1<<j)]); } } for(int i=1;i<SZ*2;i++){ for(int j=0;j<20;j++){ if((1<<j) <= i && i <= (2<<j)){ sz[i] = j; break; } } } } int get(int a,int b){ if(a == 0) return b; if(b == 0) return a; int len = max(pos[a],pos[b]) - min(pos[a],pos[b]) + 1; int ty = sz[len]; P p = min(mn[ty][min(pos[a],pos[b])], mn[ty][max(pos[a],pos[b])-(1<<ty)+1]); return p.second; } }kaede; struct RMQ{ #define s (1<<18) int seg[s]; void update(int k,int a){ k+=s/2-1; seg[k]=a; while(k>0){ k=(k-1)/2; seg[k]=kaede.get(seg[k*2+1],seg[k*2+2]); } } int query(int a,int b,int k,int l,int r){ if(r<a || b<l) return 0; if(a<=l && r<=b) return seg[k]; else{ int vl=query(a,b,k*2+1,l,(l+r)/2); int vr=query(a,b,k*2+2,(l+r)/2+1,r); return kaede.get(vl,vr); } } }rmq; int aa[100005]; void dfs2(int v,int u,int m){ chmax(mx[v], m); for(auto to:edge[v]){ if(to == u) continue; dfs2(to, v, mx[v]); } } int main(){ scanf("%d%d%d",&n,&k,&q); repn(i, n){ scanf("%d", &mx[i]); } rep(i, k){ scanf("%d", &aa[i]); } rep(i, n-1){ int a, b; scanf("%d%d", &a, &b); edge[a].pb(b); edge[b].pb(a); } kaede.prepare(); dfs2(1, -1, 0); rep(i, k) rmq.update(i, aa[i]); rep(i, q){ int ty; scanf("%d", &ty); if(ty == 1){ int a, b; scanf("%d%d", &a, &b); a--; rmq.update(a, b); } else{ int a, b; scanf("%d%d", &a, &b); int c = rmq.query(a-1, b-1, 0, 0, s/2-1); printf("%d\n", mx[c]); } } }