結果
問題 | No.1211 円環はお断り |
ユーザー | yuto1115 |
提出日時 | 2020-08-30 17:19:31 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 357 ms / 2,000 ms |
コード長 | 2,841 bytes |
コンパイル時間 | 2,349 ms |
コンパイル使用メモリ | 196,148 KB |
最終ジャッジ日時 | 2025-01-14 01:00:58 |
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 * 41 |
ソースコード
//@formatter:off #include<bits/stdc++.h> #define rep(i,n) for (int i = 0; i < int(n); ++i) #define rrep(i,n) for (int i = int(n)-1; i >= 0; i--) #define rep2(i,s,n) for (int i = int(s); i < int(n); ++i) #define all(a) a.begin(),a.end() #define rall(a) a.rbegin(),a.rend() #define pb push_back #define eb emplace_back #define vi vector<int> #define vvi vector<vector<int>> #define vl vector<ll> #define vvl vector<vector<ll>> #define vd vector<double> #define vvd vector<vector<double>> #define vs vector<string> #define vc vector<char> #define vvc vector<vector<char>> #define vb vector<bool> #define vvb vector<vector<bool>> #define vp vector<P> #define vvp vector<vector<P>> using namespace std; using ll = long long; using P = pair<int,int>; using LP = pair<ll,ll>; template<class S,class T> istream& operator>>(istream &is,pair<S,T> &p) { return is >> p.first >> p.second; } template<class S,class T> ostream& operator<<(ostream &os,const pair<S,T> &p) { return os<<'{'<<p.first<<","<<p.second<<'}'; } template<class T> istream& operator>>(istream &is,vector<T> &v) { for(T &t:v){is>>t;} return is; } template<class T> ostream& operator<<(ostream &os,const vector<T> &v) { os<<'[';rep(i,v.size())os<<v[i]<<(i==int(v.size()-1)?"":","); return os<<']'; } void Yes(bool b) { cout << (b ? "Yes" : "No") << '\n'; } void YES(bool b) { cout << (b ? "YES" : "NO") << '\n'; } template<class T> bool chmin(T& a,T b) {if(a > b){a = b; return true;} return false;} template<class T> bool chmax(T& a,T b) {if(a < b){a = b; return true;} return false;} const int inf = 1001001001; const ll linf = 1001001001001001001; //@formatter:on ll v[20][100010]; int to[20][100010]; int main() { ios::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr); int n, K; cin >> n >> K; vi a(n); cin >> a; ll sum = accumulate(all(a), 0LL); rep(i, n) a.pb(a[i]); ll ok = 1, ng = sum + 1; auto f = [&](ll x) { ll now = 0; int r = 0; rep(i, n) { while (now < x) now += a[r++]; v[0][i] = r - i; to[0][i] = r % n; now -= a[i]; } rep(k, 19) { rep(i, n) { v[k + 1][i] = v[k][i] + v[k][to[k][i]]; to[k + 1][i] = to[k][to[k][i]]; } } rep(i, n) { int pos = i; ll len = 0; int nk = K, k = 0; while (nk > 0) { if (nk & 1) { len += v[k][pos]; pos = to[k][pos]; } k++; nk >>= 1; } if(len <= n) return true; } return false; }; while (abs(ok - ng) > 1) { ll mid = (ng + ok) / 2; if (f(mid)) ok = mid; else ng = mid; } cout << ok << endl; }