結果
問題 | No.1382 Travel in Mitaru city |
ユーザー | 蜜蜂 |
提出日時 | 2021-02-06 20:18:50 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,068 bytes |
コンパイル時間 | 2,004 ms |
コンパイル使用メモリ | 186,636 KB |
実行使用メモリ | 20,864 KB |
最終ジャッジ日時 | 2024-07-04 03:39:49 |
合計ジャッジ時間 | 11,184 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
(要ログイン)
テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | WA | - |
testcase_07 | AC | 51 ms
5,888 KB |
testcase_08 | WA | - |
testcase_09 | AC | 65 ms
6,400 KB |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | AC | 121 ms
11,008 KB |
testcase_27 | WA | - |
testcase_28 | AC | 117 ms
11,136 KB |
testcase_29 | AC | 120 ms
11,132 KB |
testcase_30 | AC | 120 ms
11,264 KB |
testcase_31 | WA | - |
testcase_32 | WA | - |
testcase_33 | WA | - |
testcase_34 | WA | - |
testcase_35 | WA | - |
testcase_36 | AC | 91 ms
10,240 KB |
testcase_37 | AC | 16 ms
5,376 KB |
testcase_38 | AC | 102 ms
10,880 KB |
testcase_39 | AC | 26 ms
5,376 KB |
testcase_40 | AC | 76 ms
8,960 KB |
testcase_41 | AC | 87 ms
9,728 KB |
testcase_42 | AC | 102 ms
11,008 KB |
testcase_43 | AC | 90 ms
9,984 KB |
testcase_44 | AC | 37 ms
5,888 KB |
testcase_45 | AC | 86 ms
9,344 KB |
testcase_46 | AC | 32 ms
5,504 KB |
testcase_47 | AC | 108 ms
10,964 KB |
testcase_48 | AC | 76 ms
8,576 KB |
testcase_49 | AC | 116 ms
11,504 KB |
testcase_50 | AC | 54 ms
7,040 KB |
testcase_51 | WA | - |
testcase_52 | WA | - |
testcase_53 | WA | - |
testcase_54 | WA | - |
testcase_55 | WA | - |
testcase_56 | WA | - |
testcase_57 | WA | - |
testcase_58 | WA | - |
testcase_59 | WA | - |
testcase_60 | WA | - |
testcase_61 | AC | 4 ms
5,376 KB |
testcase_62 | AC | 2 ms
5,376 KB |
testcase_63 | AC | 15 ms
5,376 KB |
testcase_64 | AC | 5 ms
5,376 KB |
testcase_65 | AC | 2 ms
5,376 KB |
testcase_66 | AC | 4 ms
5,376 KB |
testcase_67 | AC | 4 ms
5,376 KB |
testcase_68 | AC | 7 ms
5,376 KB |
testcase_69 | AC | 4 ms
5,376 KB |
testcase_70 | AC | 8 ms
5,376 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #include <algorithm> #include <cassert> #include <vector> namespace atcoder { struct dsu { public: dsu() : _n(0) {} explicit dsu(int n) : _n(n), parent_or_size(n, -1) {} int merge(int a, int b) { assert(0 <= a && a < _n); assert(0 <= b && b < _n); int x = leader(a), y = leader(b); if (x == y) return x; if (-parent_or_size[x] < -parent_or_size[y]) std::swap(x, y); parent_or_size[x] += parent_or_size[y]; parent_or_size[y] = x; return x; } bool same(int a, int b) { assert(0 <= a && a < _n); assert(0 <= b && b < _n); return leader(a) == leader(b); } int leader(int a) { assert(0 <= a && a < _n); if (parent_or_size[a] < 0) return a; return parent_or_size[a] = leader(parent_or_size[a]); } int size(int a) { assert(0 <= a && a < _n); return -parent_or_size[leader(a)]; } std::vector<std::vector<int>> groups() { std::vector<int> leader_buf(_n), group_size(_n); for (int i = 0; i < _n; i++) { leader_buf[i] = leader(i); group_size[leader_buf[i]]++; } std::vector<std::vector<int>> result(_n); for (int i = 0; i < _n; i++) { result[i].reserve(group_size[i]); } for (int i = 0; i < _n; i++) { result[leader_buf[i]].push_back(i); } result.erase( std::remove_if(result.begin(), result.end(), [&](const std::vector<int>& v) { return v.empty(); }), result.end()); return result; } private: int _n; std::vector<int> parent_or_size; }; } // namespace atcoder using namespace atcoder; using ll = long long; using ld = long double; #define fi first #define se second #define pb push_back int main(){ int n,m,s,t; cin>>n>>m>>s>>t; s--; t--; int p[n]; int copy[n]; int newnumber[n]; int oldnumber[n]; int newp[n]; for(int i=0;i<n;i++){ cin>>p[i]; copy[i]=p[i]; } sort(copy,copy+n); reverse(copy,copy+n); map<int,int> rank; //rank[順位]=人数 map<int,int> seen; for(int i=0;i<n;i++){ rank[copy[i]]=i; } for(int i=0;i<n;i++){ newnumber[i]=rank[p[i]]-seen[p[i]]; oldnumber[newnumber[i]]=i; newp[newnumber[i]]=p[i]; seen[p[i]]++; } /*for(int i=0;i<n;i++){ cout<<newnumber[i]<<" "; } cout<<endl;*/ s=newnumber[s],t=newnumber[t]; vector<vector<int>> graph(n); for(int i=0;i<m;i++){ int a,b; cin>>a>>b; a--; b--; a=newnumber[a],b=newnumber[b]; graph[a].pb(b); graph[b].pb(a); } int dp[n]; dsu d(n); for(int i=0;i<n;i++){ dp[i]=-1*1e9; } int now=-1*1e9; for(int i=0;i<n;i++){ if(i==s){ dp[i]=0; } if(graph[i].size()!=0){ for(int neighbor:graph[i]){ if(neighbor<i){ //cout<<neighbor<<" "<<i<<endl; d.merge(neighbor,i); } } for(int neighbor:graph[i]){ // cout<<neighbor<<" "<<i<<endl; if(neighbor<i){ // cout<<neighbor<<" "<<i<<endl; if(d.same(neighbor,s)==true){ if(newp[neighbor]!=newp[i]){ dp[i]=max(dp[i],dp[neighbor]+1); dp[i]=max(dp[i],dp[rank[newp[i]]-seen[newp[i]]]+1); } else{ dp[i]=max(dp[i],dp[i-1]); } } } else{ if(d.same(neighbor,s)==true){ //dp[i]=max(dp[i],now); } } } } if(i>0){ if(d.same(i,i-1)==true){ if(newp[i]==newp[i-1]){ dp[i]=max(dp[i],now); } else{ dp[i]=max(dp[i],now+1); } } } /*for(int i=0;i<n;i++){ cout<<dp[i]<<" "; } cout<<endl;*/ now=max(now,dp[i]); } int ans=0; for(int i=0;i<n;i++){ //cout<<dp[i]<<" "; ans=max(ans,dp[i]); } cout<<ans<<endl; }