oj.uz

Submission #572270

# Submission time Handle Problem Language Result Execution time Memory
572270 2022-06-04T07:30:22 Z SSRS Weighting stones (IZhO11_stones) C++14
100 / 100
 227 ms 3732 KB 
#include <bits/stdc++.h>
using namespace std;
const int INF = 1000000;
struct lazy_segment_tree{
  int N;
  vector<int> mn, mx, lazy;
  lazy_segment_tree(int N2){
    N = 1;
    while (N < N2){
      N *= 2;
    }
    mn = vector<int>(N * 2 - 1, INF);
    mx = vector<int>(N * 2 - 1, -INF);
    for (int i = 0; i < N2; i++){
      mn[N - 1 + i] = 0;
      mx[N - 1 + i] = 0;
    }
    for (int i = N - 2; i >= 0; i--){
      mn[i] = min(mn[i * 2 + 1], mn[i * 2 + 2]);
      mx[i] = max(mx[i * 2 + 1], mx[i * 2 + 2]);
    }
    lazy = vector<int>(N * 2 - 1, 0);
  }
  void eval(int i){
    if (i < N - 1){
      lazy[i * 2 + 1] += lazy[i];
      lazy[i * 2 + 2] += lazy[i];
    }
    mn[i] += lazy[i];
    mx[i] += lazy[i];
    lazy[i] = 0;
  }
  void range_add(int L, int R, int x, int i, int l, int r){
    eval(i);
    if (r <= L || R <= l){
      return;
    } else if (L <= l && r <= R){
      lazy[i] += x;
      eval(i);
    } else {
      int m = (l + r) / 2;
      range_add(L, R, x, i * 2 + 1, l, m);
      range_add(L, R, x, i * 2 + 2, m, r);
      mn[i] = min(mn[i * 2 + 1], mn[i * 2 + 2]);
      mx[i] = max(mx[i * 2 + 1], mx[i * 2 + 2]);
    }
  }
  void range_add(int L, int R, int x){
    range_add(L, R, x, 0, 0, N);
  }
  int all_min(){
    eval(0);
    return mn[0];
  }
  int all_max(){
    eval(0);
    return mx[0];
  }
};
int main(){
  int N;
  cin >> N;
  lazy_segment_tree ST(N);
  for (int i = 0; i < N; i++){
    int R, S;
    cin >> R >> S;
    if (S == 1){
      ST.range_add(0, R, 1);
    }
    if (S == 2){
      ST.range_add(0, R, -1);
    }
    if (ST.all_max() <= 0){
      cout << '<' << endl;
    } else if (ST.all_min() >= 0){
      cout << '>' << endl;
    } else {
      cout << '?' << endl;
    }
  }
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 2 ms 212 KB Output is correct
8 Correct 3 ms 340 KB Output is correct
9 Correct 2 ms 340 KB Output is correct
10 Correct 18 ms 720 KB Output is correct
11 Correct 115 ms 1880 KB Output is correct
12 Correct 203 ms 3588 KB Output is correct
13 Correct 204 ms 3672 KB Output is correct
14 Correct 215 ms 3580 KB Output is correct
15 Correct 219 ms 3732 KB Output is correct
16 Correct 199 ms 3564 KB Output is correct
17 Correct 223 ms 3532 KB Output is correct
18 Correct 204 ms 3704 KB Output is correct
19 Correct 227 ms 3544 KB Output is correct
20 Correct 209 ms 3576 KB Output is correct
21 Correct 197 ms 3532 KB Output is correct
22 Correct 218 ms 3556 KB Output is correct
23 Correct 210 ms 3536 KB Output is correct
24 Correct 212 ms 3564 KB Output is correct
25 Correct 217 ms 3528 KB Output is correct