oj.uz

답안 #883923

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
883923 2023-12-06T12:04:51 Z vjudge1 Passport (JOI23_passport) C++17
48 / 100
 2000 ms 210992 KB 
/* Author : Mychecksdead  */
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define pb push_back
#define all(x) x.begin(), x.end()
#define en cout << '\n'
const int N = 2e5+100, M = 1e5+10, K = 21;


int n, A[N][K], B[N][K], T[4*N], ans[N];
map<int, int> dp[N];  
array<int, 2> a[N];

void build(){for(int i = 0; i <= 4*n; ++i) T[i] = MOD;}

void update(int l, int r, int p, int k, int val){
  if(l == r){
    T[k] = val;
    return;
  }
  int m = l+r>>1;
  if(p <= m)
    update(l, m, p, k<<1, val);
  else
    update(m+1, r, p, k<<1|1, val);
  T[k] = min(T[k<<1], T[k<<1|1]);
}
int get(int l, int r, int ql, int qr, int k){
  if(ql > r || l > qr) return MOD;
  if(ql <= l && r <= qr) return T[k];
  int m = l+r>>1;
  return min(get(l, m, ql, qr, k<<1), get(m+1, r, ql, qr, k<<1|1));
}


int get_max(int l, int r){
  int k = int(log2(r-l+1));
  return max(B[l][k], B[r-(1<<k)+1][k]);
}
int get_min(int l, int r){
  int k = int(log2(r-l+1));
  return min(A[l][k], A[r-(1<<k)+1][k]);
}


int dfs(int l, int r){
  if(dp[l].find(r) != dp[l].end()) return dp[l][r];
  dp[l][r] = MOD;
  int val = MOD;
  val = min(val, get(1, n, l, r, 1));
  int L = get_min(l, r);
  int R = get_max(l, r);
  if(L < l) val = min(val, dfs(L, r) + 1);
  if(r < R) val = min(val, dfs(l, R) + 1);
  // cout << l << ' ' << r << ' ' << val << '\n';
  return dp[l][r] = val;
}
void solve(){
  cin >> n;
  for(int i = 1; i <= n; ++i) cin >> a[i][0] >> a[i][1]; 

  for(int i = 1; i <= n; ++i) A[i][0] = a[i][0], B[i][0] = a[i][1];
  for(int j = 1; j < K; ++j){
    for(int i = 1; i + (1<<j) <= n+1; ++i){
      A[i][j] = min(A[i][j - 1], A[i + (1<<(j-1))][j - 1]);
      B[i][j] = max(B[i][j - 1], B[i + (1<<(j-1))][j - 1]);
    }
  }
  vector<int> Q;
  for(int i = 1; i <= n; ++i) Q.pb(i);
  sort(all(Q), [&](const int &x, const int &y){
    return (a[x][1] - a[x][0]) > (a[y][1] - a[y][0]);
  });
  build();
  dp[1][n] = 0;
  for(auto V: Q){
    int v = V;
    // cout << v << ":\n";
    int c = dfs(a[v][0], a[v][1]) + 1;
    ans[v] = c;
    update(1, n, v, 1, c);
  }
  int q; cin >> q;
  for(int i = 0; i < q; ++i){
    int v; cin >> v;
    cout << (ans[v] >= MOD ? -1 : ans[v]) << '\n';
  }
}
 
 
int main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int tt = 1, aa;
  // freopen("in.txt", "r", stdin);
  // freopen("out.txt", "w", stdout);
  while(tt--){
    solve();
  }
  cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n";
  return 0;
}

Compilation message

passport.cpp: In function 'void update(int, int, int, int, int)':
passport.cpp:24:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   24 |   int m = l+r>>1;
      |           ~^~
passport.cpp: In function 'int get(int, int, int, int, int)':
passport.cpp:34:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   34 |   int m = l+r>>1;
      |           ~^~
passport.cpp: In function 'int main()':
passport.cpp:96:15: warning: unused variable 'aa' [-Wunused-variable]
   96 |   int tt = 1, aa;
      |               ^~

Subtask #1
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 16728 KB Output is correct
2 Correct 3 ms 16732 KB Output is correct
3 Correct 3 ms 16732 KB Output is correct
4 Correct 608 ms 76736 KB Output is correct
5 Execution timed out 2033 ms 210992 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 16728 KB Output is correct
2 Correct 3 ms 16732 KB Output is correct
3 Correct 4 ms 16732 KB Output is correct
4 Correct 3 ms 16732 KB Output is correct
5 Correct 2 ms 16728 KB Output is correct
6 Correct 3 ms 16732 KB Output is correct
7 Correct 3 ms 16732 KB Output is correct
8 Correct 3 ms 16868 KB Output is correct
9 Correct 3 ms 16728 KB Output is correct
10 Correct 3 ms 16728 KB Output is correct
11 Correct 4 ms 16732 KB Output is correct
12 Correct 5 ms 17244 KB Output is correct
13 Correct 4 ms 16988 KB Output is correct
14 Correct 3 ms 16732 KB Output is correct
15 Correct 6 ms 17244 KB Output is correct

Subtask #3
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 16728 KB Output is correct
2 Correct 3 ms 16732 KB Output is correct
3 Correct 4 ms 16732 KB Output is correct
4 Correct 3 ms 16732 KB Output is correct
5 Correct 2 ms 16728 KB Output is correct
6 Correct 3 ms 16732 KB Output is correct
7 Correct 3 ms 16732 KB Output is correct
8 Correct 3 ms 16868 KB Output is correct
9 Correct 3 ms 16728 KB Output is correct
10 Correct 3 ms 16728 KB Output is correct
11 Correct 4 ms 16732 KB Output is correct
12 Correct 5 ms 17244 KB Output is correct
13 Correct 4 ms 16988 KB Output is correct
14 Correct 3 ms 16732 KB Output is correct
15 Correct 6 ms 17244 KB Output is correct
16 Correct 6 ms 17244 KB Output is correct
17 Correct 187 ms 38252 KB Output is correct
18 Correct 85 ms 26676 KB Output is correct
19 Correct 7 ms 17500 KB Output is correct
20 Correct 1243 ms 163716 KB Output is correct
21 Correct 259 ms 53592 KB Output is correct
22 Correct 3 ms 16728 KB Output is correct
23 Correct 6 ms 16988 KB Output is correct
24 Correct 5 ms 16988 KB Output is correct

Subtask #4
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 16728 KB Output is correct
2 Correct 3 ms 16732 KB Output is correct
3 Correct 4 ms 16732 KB Output is correct
4 Correct 3 ms 16732 KB Output is correct
5 Correct 2 ms 16728 KB Output is correct
6 Correct 3 ms 16732 KB Output is correct
7 Correct 3 ms 16732 KB Output is correct
8 Correct 3 ms 16868 KB Output is correct
9 Correct 3 ms 16728 KB Output is correct
10 Correct 3 ms 16728 KB Output is correct
11 Correct 4 ms 16732 KB Output is correct
12 Correct 5 ms 17244 KB Output is correct
13 Correct 4 ms 16988 KB Output is correct
14 Correct 3 ms 16732 KB Output is correct
15 Correct 6 ms 17244 KB Output is correct
16 Correct 6 ms 17244 KB Output is correct
17 Correct 187 ms 38252 KB Output is correct
18 Correct 85 ms 26676 KB Output is correct
19 Correct 7 ms 17500 KB Output is correct
20 Correct 1243 ms 163716 KB Output is correct
21 Correct 259 ms 53592 KB Output is correct
22 Correct 3 ms 16728 KB Output is correct
23 Correct 6 ms 16988 KB Output is correct
24 Correct 5 ms 16988 KB Output is correct
25 Correct 3 ms 16728 KB Output is correct
26 Correct 3 ms 16732 KB Output is correct
27 Correct 7 ms 17240 KB Output is correct
28 Correct 209 ms 38304 KB Output is correct
29 Correct 1206 ms 163896 KB Output is correct
30 Correct 262 ms 53848 KB Output is correct
31 Correct 5 ms 16988 KB Output is correct

Subtask #5
0 / 46.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 16728 KB Output is correct
2 Correct 3 ms 16732 KB Output is correct
3 Correct 3 ms 16732 KB Output is correct
4 Correct 608 ms 76736 KB Output is correct
5 Execution timed out 2033 ms 210992 KB Time limit exceeded
6 Halted 0 ms 0 KB -