結果
問題 | No.1244 Black Segment |
ユーザー | rniya |
提出日時 | 2020-10-02 22:17:33 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 37 ms / 2,000 ms |
コード長 | 3,136 bytes |
コンパイル時間 | 1,524 ms |
コンパイル使用メモリ | 175,760 KB |
実行使用メモリ | 9,856 KB |
最終ジャッジ日時 | 2024-07-17 21:36:45 |
合計ジャッジ時間 | 3,314 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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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 | 1 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | AC | 1 ms
6,944 KB |
testcase_03 | AC | 2 ms
6,944 KB |
testcase_04 | AC | 1 ms
6,940 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 1 ms
6,940 KB |
testcase_07 | AC | 2 ms
6,940 KB |
testcase_08 | AC | 1 ms
6,940 KB |
testcase_09 | AC | 2 ms
6,940 KB |
testcase_10 | AC | 1 ms
6,940 KB |
testcase_11 | AC | 2 ms
6,944 KB |
testcase_12 | AC | 1 ms
6,940 KB |
testcase_13 | AC | 3 ms
6,944 KB |
testcase_14 | AC | 20 ms
6,940 KB |
testcase_15 | AC | 3 ms
6,940 KB |
testcase_16 | AC | 18 ms
6,944 KB |
testcase_17 | AC | 2 ms
6,940 KB |
testcase_18 | AC | 11 ms
6,944 KB |
testcase_19 | AC | 15 ms
6,940 KB |
testcase_20 | AC | 27 ms
8,064 KB |
testcase_21 | AC | 26 ms
8,232 KB |
testcase_22 | AC | 27 ms
8,064 KB |
testcase_23 | AC | 31 ms
8,832 KB |
testcase_24 | AC | 30 ms
8,448 KB |
testcase_25 | AC | 28 ms
8,064 KB |
testcase_26 | AC | 30 ms
8,804 KB |
testcase_27 | AC | 37 ms
9,856 KB |
testcase_28 | AC | 30 ms
8,644 KB |
testcase_29 | AC | 33 ms
8,960 KB |
testcase_30 | AC | 29 ms
8,192 KB |
testcase_31 | AC | 33 ms
9,088 KB |
testcase_32 | AC | 35 ms
9,216 KB |
testcase_33 | AC | 33 ms
8,960 KB |
testcase_34 | AC | 19 ms
6,944 KB |
testcase_35 | AC | 20 ms
6,940 KB |
testcase_36 | AC | 24 ms
7,680 KB |
testcase_37 | AC | 29 ms
8,448 KB |
testcase_38 | AC | 18 ms
6,944 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define LOCAL #pragma region Macros typedef long long ll; #define ALL(x) (x).begin(),(x).end() const long long MOD=1000000007; // const long long MOD=998244353; const int INF=1e9; const long long IINF=1e18; const int dx[4]={1,0,-1,0},dy[4]={0,1,0,-1}; const char dir[4]={'D','R','U','L'}; template<typename T> istream &operator>>(istream &is,vector<T> &v){ for (T &x:v) is >> x; return is; } template<typename T> ostream &operator<<(ostream &os,const vector<T> &v){ for (int i=0;i<v.size();++i){ os << v[i] << (i+1==v.size()?"": " "); } return os; } template<typename T,typename U> ostream &operator<<(ostream &os,const pair<T,U> &p){ os << '(' << p.first << ',' << p.second << ')'; return os; } template<typename T,typename U> ostream &operator<<(ostream &os,const map<T,U> &m){ os << '{'; for (auto itr=m.begin();itr!=m.end();++itr){ os << '(' << itr->first << ',' << itr->second << ')'; if (++itr!=m.end()) os << ','; --itr; } os << '}'; return os; } template<typename T> ostream &operator<<(ostream &os,const set<T> &s){ os << '{'; for (auto itr=s.begin();itr!=s.end();++itr){ os << *itr; if (++itr!=s.end()) os << ','; --itr; } os << '}'; return os; } void debug_out(){cerr << '\n';} template<class Head,class... Tail> void debug_out(Head&& head,Tail&&... tail){ cerr << head; if (sizeof...(Tail)>0) cerr << ", "; debug_out(move(tail)...); } #ifdef LOCAL #define debug(...) cerr << " ";\ cerr << #__VA_ARGS__ << " :[" << __LINE__ << ":" << __FUNCTION__ << "]" << '\n';\ cerr << " ";\ debug_out(__VA_ARGS__) #else #define debug(...) 42 #endif template<typename T> T gcd(T x,T y){return y!=0?gcd(y,x%y):x;} template<typename T> T lcm(T x,T y){return x/gcd(x,y)*y;} template<class T1,class T2> inline bool chmin(T1 &a,T2 b){ if (a>b){a=b; return true;} return false; } template<class T1,class T2> inline bool chmax(T1 &a,T2 b){ if (a<b){a=b; return true;} return false; } #pragma endregion int main(){ cin.tie(0); ios::sync_with_stdio(false); int N,M,A,B; cin >> N >> M >> A >> B; --A,B; vector<int> L(M),R(M); for (int i=0;i<M;++i) cin >> L[i] >> R[i],--L[i]; for (int i=0;i<M;++i){ if (L[i]<=A&&B<=R[i]){ cout << 1 << '\n'; return 0; } } vector<vector<int>> G(N+2); auto add_edge=[&](int u,int v){ G[u].emplace_back(v); G[v].emplace_back(u); }; int s=N,t=N+1; for (int i=0;i<M;++i){ if (L[i]<=A){ if (R[i]<=A) continue; add_edge(s,R[i]); } else if (L[i]<B){ if (R[i]<B) add_edge(L[i],R[i]); else add_edge(L[i],t); } } queue<int> que; vector<int> dp(N+2,INF); dp[s]=0; que.emplace(s); while(!que.empty()){ int v=que.front(); que.pop(); for (int u:G[v]){ if (dp[v]+1<dp[u]){ dp[u]=dp[v]+1; que.emplace(u); } } } cout << (dp[t]==INF?-1:dp[t]) << '\n'; }