oj.uz

답안 #773945

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
773945 2023-07-05T09:48:56 Z Sam_a17 3단 점프 (JOI19_jumps) C++17
19 / 100
 366 ms 239500 KB 
#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
//#include "temp.cpp"
#include <cstdio>
using namespace std;
 
#ifndef ONLINE_JUDGE
#define dbg(x) cerr << #x <<" "; print(x); cerr << endl;
#else
#define dbg(x)
#endif
 
#define sz(x) (int)x.size()
#define len(x) (int)x.length()
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define clr(x) (x).clear()
#define uniq(x) x.resize(unique(all(x)) - x.begin());
#define blt __builtin_popcount
 
#define pb push_back
#define popf pop_front
#define popb pop_back
#define ld long double
#define ll long long
 
void print(long long t) {cerr << t;}
void print(int t) {cerr << t;}
void print(string t) {cerr << t;}
void print(char t) {cerr << t;}
void print(double t) {cerr << t;}
void print(long double t) {cerr << t;}
void print(unsigned long long t) {cerr << t;}
 
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
#define nl '\n'
 
// Indexed Set  
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
 
template <class T, class V> void print(pair <T, V> p);
template <class T> void print(vector <T> v);
template <class T> void print(set <T> v);
template <class T, class V> void print(map <T, V> v);
template <class T> void print(multiset <T> v);
template <class T, class V> void print(T v[],V n) {cerr << "["; for(int i = 0; i < n; i++) {print(v[i]); cerr << " "; } cerr << "]";}
template <class T, class V> void print(pair <T, V> p) {cerr << "{"; print(p.first); cerr << ","; print(p.second); cerr << "}";}
template <class T> void print(vector <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
// template <class T> void print(vector <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(set <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(multiset <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(Tree <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T, class V> void print(map <T, V> v) {cerr << "[ "; for (auto i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(deque <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
 
 
// for random generations
mt19937 myrand(chrono::steady_clock::now().time_since_epoch().count());
// mt19937 myrand(131);
 
// for grid problems
int dx[8] = {-1,0,1,0,1,-1,1,-1};
int dy[8] = {0,1,0,-1,1,1,-1,-1};
 
// lowest / (1 << 17) >= 1e5 / (1 << 18) >= 2e5 / (1 << 21) >= 1e6
void fastIO() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr); cout.tie(nullptr);
}
// file in/out
void setIO(string str = "") {
  fastIO();
 
  if(str == "input") {
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
  } else if(str != "") {
    freopen((str + ".in").c_str(), "r", stdin);
    freopen((str + ".out").c_str(), "w", stdout);
  }
}
 
const int N = 5e5 + 10;
long long dp[5005][5005];
long long mx[5005][5005];
long long a[N];
int n, q;

struct segTreeMax {
  vector<long long> mTree;
  int size;
 
  void init(long long n) {
    size = 1;
    while(size < n)  {
      size *= 2;
    }
    mTree.assign(2 * size - 1, INT64_MIN);
  }
 
  void upd(int u, long long v, int x, int lx, int rx) { // set value at pos u
    if(rx - lx == 1) {
      mTree[x] = v;
      return;
    }
 
    int m = (lx + rx) / 2;
    if(u < m) {
      upd(u, v, 2 * x + 1, lx, m);
    }else {
      upd(u, v, 2 * x + 2, m, rx);
    }
    mTree[x] = max(mTree[2 * x + 1], mTree[2 * x + 2]);
  }
 
  void upd(int u, long long v) {
    upd(u, v, 0, 0, size);
  }
 
  long long qry (int l, int r, int x, int lx, int rx) { // range queries
    if(l >= rx || lx >= r) {
      return INT64_MIN;
    }
    if(lx >= l && r >= rx) {
      return mTree[x];
    }
 
    int m = (rx + lx) / 2;
    long long s1 = qry(l, r, 2 * x + 1, lx, m);
    long long s2 = qry(l, r, 2 * x + 2, m, rx);
    return max(s1, s2);
  }
 
  long long qry(int l, int r) {
    return qry(l, r, 0, 0, size);
  }
};

segTreeMax seg;
 
 
void solve_() {
  cin >> n;
  
  seg.init(n + 4);
  for(int i = 1; i <= n; i++) {
    cin >> a[i];
    seg.upd(i, a[i]);
  }


  if(n <= 5000) {
    for(int i = 1; i <= n; i++) {
      long long m = a[i];
      mx[i][i] = a[i];
      for(int j = i; j <= n; j++) {
        m = max(m, a[j]);
        mx[i][j] = m;
      }
    }
  
  
    for(int i = 1; i <= n; i++) {
      for(int j = i + 2; j <= n; j++) {
        int c = (i + j) / 2;
        dp[i][j] = a[i] + a[j] + mx[i + 1][c];
      }
    }
  
    for(int len = 3; len <= n; len++) {
      for(int l = 1; l + len - 1 <= n; l++) {
        int r = l + len - 1;
        dp[l][r] = max(dp[l][r], dp[l + 1][r]);
        dp[l][r] = max(dp[l][r], dp[l][r - 1]);
      }
    }
  
    cin >> q;
    while(q--) {
      int l, r; cin >> l >> r;
      cout << dp[l][r] << '\n';
    } 
  } else {

    vector<pair<int, int>> vec;
    for(int i = 1; i <= n; i++) {
      vec.push_back({a[i], i});
    }

    sort(rall(vec));

    int mn = min(100, sz(vec));
    
    vector<int> loc;
    for(int i = 0; i < mn; i++) {
      loc.push_back(vec[i].second);
    }

    sort(all(loc));

    long long answ = 0;
    for(int i = 0; i < sz(loc); i++) {
      for(int j = i + 1; j < sz(loc); j++) {
        if(loc[j] - loc[i] >= 2) {
          int x = (loc[i] + loc[j]) / 2;
          answ = max(answ, a[loc[i]] + a[loc[j]] + seg.qry(loc[i] + 1, x + 1));
        }
      }
    }

    cout << answ << '\n';
  }
}
 
int main() {
  setIO();
 
  auto solve = [&](int test_case)-> void {
    for(int i = 1; i <= test_case; i++) {
      solve_();
    }
  };
 
  int test_cases = 1;
  // cin >> test_cases;
  solve(test_cases);
 
  return 0;
}

Compilation message

jumps.cpp: In function 'void setIO(std::string)':
jumps.cpp:76:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |     freopen("input.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
jumps.cpp:77:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |     freopen("output.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
jumps.cpp:79:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   79 |     freopen((str + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
jumps.cpp:80:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |     freopen((str + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 1108 KB Output is correct
3 Correct 1 ms 1108 KB Output is correct
4 Correct 1 ms 1108 KB Output is correct
5 Correct 1 ms 1108 KB Output is correct
6 Correct 1 ms 1108 KB Output is correct
7 Correct 1 ms 1108 KB Output is correct
8 Correct 1 ms 1108 KB Output is correct
9 Correct 1 ms 1108 KB Output is correct
10 Correct 1 ms 1108 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 1108 KB Output is correct
3 Correct 1 ms 1108 KB Output is correct
4 Correct 1 ms 1108 KB Output is correct
5 Correct 1 ms 1108 KB Output is correct
6 Correct 1 ms 1108 KB Output is correct
7 Correct 1 ms 1108 KB Output is correct
8 Correct 1 ms 1108 KB Output is correct
9 Correct 1 ms 1108 KB Output is correct
10 Correct 1 ms 1108 KB Output is correct
11 Correct 346 ms 239416 KB Output is correct
12 Correct 363 ms 239296 KB Output is correct
13 Correct 327 ms 239352 KB Output is correct
14 Correct 336 ms 239388 KB Output is correct
15 Correct 366 ms 239500 KB Output is correct
16 Correct 338 ms 238776 KB Output is correct
17 Correct 356 ms 238656 KB Output is correct
18 Correct 357 ms 238652 KB Output is correct
19 Correct 355 ms 239300 KB Output is correct

Subtask #3
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 46 ms 8120 KB Output is correct
2 Correct 32 ms 8180 KB Output is correct
3 Correct 33 ms 8088 KB Output is correct
4 Correct 47 ms 8196 KB Output is correct
5 Correct 46 ms 8192 KB Output is correct
6 Incorrect 46 ms 8136 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #4
0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 1108 KB Output is correct
3 Correct 1 ms 1108 KB Output is correct
4 Correct 1 ms 1108 KB Output is correct
5 Correct 1 ms 1108 KB Output is correct
6 Correct 1 ms 1108 KB Output is correct
7 Correct 1 ms 1108 KB Output is correct
8 Correct 1 ms 1108 KB Output is correct
9 Correct 1 ms 1108 KB Output is correct
10 Correct 1 ms 1108 KB Output is correct
11 Correct 346 ms 239416 KB Output is correct
12 Correct 363 ms 239296 KB Output is correct
13 Correct 327 ms 239352 KB Output is correct
14 Correct 336 ms 239388 KB Output is correct
15 Correct 366 ms 239500 KB Output is correct
16 Correct 338 ms 238776 KB Output is correct
17 Correct 356 ms 238656 KB Output is correct
18 Correct 357 ms 238652 KB Output is correct
19 Correct 355 ms 239300 KB Output is correct
20 Correct 46 ms 8120 KB Output is correct
21 Correct 32 ms 8180 KB Output is correct
22 Correct 33 ms 8088 KB Output is correct
23 Correct 47 ms 8196 KB Output is correct
24 Correct 46 ms 8192 KB Output is correct
25 Incorrect 46 ms 8136 KB Output isn't correct
26 Halted 0 ms 0 KB -