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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#643857#7963. 多折较差验证hos_lyric#WA 1784ms143048kbC++147.5kb2024-10-16 03:11:392024-10-16 03:11:40

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你现在查看的是最新测评结果

  • [2024-10-16 03:11:40]
  • 评测
  • 测评结果:WA
  • 用时:1784ms
  • 内存:143048kb
  • [2024-10-16 03:11:39]
  • 提交

answer

#include <cassert>
#include <cmath>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <functional>
#include <iostream>
#include <limits>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>

using namespace std;

using Int = long long;

template <class T1, class T2> ostream &operator<<(ostream &os, const pair<T1, T2> &a) { return os << "(" << a.first << ", " << a.second << ")"; };
template <class T> ostream &operator<<(ostream &os, const vector<T> &as) { const int sz = as.size(); os << "["; for (int i = 0; i < sz; ++i) { if (i >= 256) { os << ", ..."; break; } if (i > 0) { os << ", "; } os << as[i]; } return os << "]"; }
template <class T> void pv(T a, T b) { for (T i = a; i != b; ++i) cerr << *i << " "; cerr << endl; }
template <class T> bool chmin(T &t, const T &f) { if (t > f) { t = f; return true; } return false; }
template <class T> bool chmax(T &t, const T &f) { if (t < f) { t = f; return true; } return false; }
#define COLOR(s) ("\x1b[" s "m")


// T: monoid representing information of an interval.
//   T()  should return the identity.
//   T(S s)  should represent a single element of the array.
//   T::pull(const T &l, const T &r)  should pull two intervals.
template <class T> struct SegmentTreePoint {
  int logN, n;
  vector<T> ts;
  SegmentTreePoint() : logN(0), n(0) {}
  explicit SegmentTreePoint(int n_) {
    for (logN = 0, n = 1; n < n_; ++logN, n <<= 1) {}
    ts.resize(n << 1);
  }
  template <class S> explicit SegmentTreePoint(const vector<S> &ss) {
    const int n_ = ss.size();
    for (logN = 0, n = 1; n < n_; ++logN, n <<= 1) {}
    ts.resize(n << 1);
    for (int i = 0; i < n_; ++i) at(i) = T(ss[i]);
    build();
  }
  T &at(int i) {
    return ts[n + i];
  }
  void build() {
    for (int u = n; --u; ) pull(u);
  }

  inline void pull(int u) {
    ts[u].pull(ts[u << 1], ts[u << 1 | 1]);
  }

  // Changes the value of point a to s.
  template <class S> void change(int a, const S &s) {
    assert(0 <= a); assert(a < n);
    ts[a += n] = T(s);
    for (; a >>= 1; ) pull(a);
  }

  // Applies T::f(args...) to point a.
  template <class F, class... Args>
  void ch(int a, F f, Args &&... args) {
    assert(0 <= a); assert(a < n);
    (ts[a += n].*f)(args...);
    for (; a >>= 1; ) pull(a);
  }

  // Calculates the product for [a, b).
  T get(int a, int b) {
    assert(0 <= a); assert(a <= b); assert(b <= n);
    if (a == b) return T();
    T prodL, prodR, t;
    for (a += n, b += n; a < b; a >>= 1, b >>= 1) {
      if (a & 1) { t.pull(prodL, ts[a++]); prodL = t; }
      if (b & 1) { t.pull(ts[--b], prodR); prodR = t; }
    }
    t.pull(prodL, prodR);
    return t;
  }

  // Calculates T::f(args...) of a monoid type for [a, b).
  //   op(-, -)  should calculate the product.
  //   e()  should return the identity.
  template <class Op, class E, class F, class... Args>
#if __cplusplus >= 201402L
  auto
#else
  decltype((std::declval<T>().*F())())
#endif
  get(int a, int b, Op op, E e, F f, Args &&... args) {
    assert(0 <= a); assert(a <= b); assert(b <= n);
    if (a == b) return e();
    auto prodL = e(), prodR = e();
    for (a += n, b += n; a < b; a >>= 1, b >>= 1) {
      if (a & 1) prodL = op(prodL, (ts[a++].*f)(args...));
      if (b & 1) prodR = op((ts[--b].*f)(args...), prodR);
    }
    return op(prodL, prodR);
  }

  // Find min b s.t. T::f(args...) returns true,
  // when called for the partition of [a, b) from left to right.
  //   Returns n + 1 if there is no such b.
  template <class F, class... Args>
  int findRight(int a, F f, Args &&... args) {
    assert(0 <= a); assert(a <= n);
    if ((T().*f)(args...)) return a;
    if (a == n) return n + 1;
    a += n;
    for (; ; a >>= 1) if (a & 1) {
      if ((ts[a].*f)(args...)) {
        for (; a < n; ) {
          if (!(ts[a <<= 1].*f)(args...)) ++a;
        }
        return a - n + 1;
      }
      ++a;
      if (!(a & (a - 1))) return n + 1;
    }
  }

  // Find max a s.t. T::f(args...) returns true,
  // when called for the partition of [a, b) from right to left.
  //   Returns -1 if there is no such a.
  template <class F, class... Args>
  int findLeft(int b, F f, Args &&... args) {
    assert(0 <= b); assert(b <= n);
    if ((T().*f)(args...)) return b;
    if (b == 0) return -1;
    b += n;
    for (; ; b >>= 1) if ((b & 1) || b == 2) {
      if ((ts[b - 1].*f)(args...)) {
        for (; b <= n; ) {
          if (!(ts[(b <<= 1) - 1].*f)(args...)) --b;
        }
        return b - n - 1;
      }
      --b;
      if (!(b & (b - 1))) return -1;
    }
  }
};  // SegmentTreePoint<T>

////////////////////////////////////////////////////////////////////////////////

constexpr int INF = 1001001001;

struct NodeMin {
  int mn;
  NodeMin() : mn(+INF) {}
  NodeMin(int val) : mn(val) {}
  void pull(const NodeMin &l, const NodeMin &r) {
    mn = min(l.mn, r.mn);
  }
  void ch(int val) {
    mn = val;
  }
  void chmin(int val) {
    if (mn > val) mn = val;
  }
  bool test(int tar) const {
    return (mn <= tar);
  }
};
struct NodeMax {
  int mx;
  NodeMax() : mx(-INF) {}
  NodeMax(int val) : mx(val) {}
  void pull(const NodeMax &l, const NodeMax &r) {
    mx = max(l.mx, r.mx);
  }
  void ch(int val) {
    mx = val;
  }
  void chmax(int val) {
    if (mx < val) mx = val;
  }
  bool test(int tar) const {
    return (mx >= tar);
  }
};

////////////////////////////////////////////////////////////////////////////////


int N;
char S[5010];

pair<int, int> dp[5010][5010];

int main() {
  for (; ~scanf("%d", &N); ) {
    scanf("%s", S);
    
    vector<int> rads(N, 0);
    for (int i = 0; i < N; ++i) {
      for (int l = i - 1, r = i + 1; 0 <= l && r < N && S[l] != S[r]; --l, ++r) {
        ++rads[i];
      }
    }
// cerr<<"rads = "<<rads<<endl;
    
    SegmentTreePoint<NodeMax> segL(N), segR(N);
    for (int i = 0; i < N; ++i) {
      segL.at(i) = rads[i] - i;
      segR.at(i) = rads[i] + i;
    }
    segL.build();
    segR.build();
    
    for (int l = 0; l <= N; ++l) for (int r = l; r <= N; ++r) {
      dp[l][r] = make_pair(INF, INF);
    }
    for (int i = 0; i <= N; ++i) {
      dp[i][i] = make_pair(0, 0);
    }
    for (int l = N; --l >= 0; ) {
      for (int r = l + 1; r <= N; ++r) {
        /*
        for (int m = (l + r - 1) / 2; --m >= l; ) if (rads[m] >= m - l) {
          chmin(dp[l][r], make_pair(dp[m + 1][r].first + 1, dp[m + 1][r].second + ((r - (m + 1)) - (m - l))));
          break;
        }
        for (int m = (l + r) / 2; m < r; ++m) if (rads[m] >= r - (m + 1)) {
          chmin(dp[l][r], make_pair(dp[l][m].first + 1, dp[l][m].second + ((m - l) - (r - (m + 1)))));
          break;
        }
        */
        {
          const int m = segL.findLeft((l + r - 1) / 2 + 1, &NodeMax::test, -l);
          if (l <= m) {
            chmin(dp[l][r], make_pair(dp[m + 1][r].first + 1, dp[m + 1][r].second + ((r - (m + 1)) - (m - l))));
          }
        }
        {
          const int m = segR.findRight((l + r) / 2, &NodeMax::test, r) - 1;
          if (m < r) {
            chmin(dp[l][r], make_pair(dp[l][m].first + 1, dp[l][m].second + ((m - l) - (r - (m + 1)))));
          }
        }
      }
    }
    
    printf("%d %d\n", dp[0][N].first, dp[0][N].second);
  }
  return 0;
}

Details

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Test #1:

score: 100
Accepted
time: 1601ms
memory: 136932kb

input:

5000
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^...

output:

5000 12497500

result:

ok single line: '5000 12497500'

Test #2:

score: -100
Wrong Answer
time: 1784ms
memory: 143048kb

input:

4991
^^vv^v^^^^vvv^^^^^^vvvv^^^^^^^vv^^^^^^^^v^^^^^^v^^^v^^v^^^v^^^^^v^^v^^^^^^^^vv^^^^^^^^^^vvvvvvv^v^^^^^v^v^^^^^v^^^^^^^^^^^v^^^^^vv^v^^^^^v^^^^vvv^^^v^^^^v^^^^^vv^^v^^^^^^^v^^^^^^^^^v^v^^^v^^v^^^^^v^^^vv^v^^^v^^^v^v^v^^^^v^^^vv^^^^vv^^v^^v^^^^^^^v^^^^^^v^^^^v^^^^^^v^^v^v^^^^^^^^v^^^^^v^^^v^v^^^^...

output:

2750 6912790

result:

wrong answer 1st lines differ - expected: '2748 6735487', found: '2750 6912790'