oj.uz

Submission #949873

# Submission time Handle Problem Language Result Execution time Memory
949873 2024-03-19T19:30:22 Z fuad27 Alternating Current (BOI18_alternating) C++17
13 / 100
 3000 ms 2652 KB 
#include <bits/stdc++.h>
using namespace std;
mt19937 rng(chrono::steady_clock().now().time_since_epoch().count());
long double P(int old, int nw, long double temp) {
  if(nw < old)return 1.0;
  return exp((old-nw)/temp);

}
vector<int> mask;
vector<pair<int,int>> a;
int n, m;
int eval() {
  int cnt1[n+1], cnt2[n+1];
  memset(cnt1, 0, sizeof cnt1);
  memset(cnt2, 0, sizeof cnt2);
  for(int i = 0;i<m;i++) {
    if(mask[i]) {
      if(a[i].second>=a[i].first) {
        cnt1[a[i].first]++;
        cnt1[a[i].second+1]--;
      }
      else {
        cnt1[a[i].first]++;
        cnt1[0]++;
        cnt1[a[i].second+1]--;
      }
    }
    else {
      if(a[i].second>=a[i].first) {
        cnt2[a[i].first]++;
        cnt2[a[i].second+1]--;
      }
      else {
        cnt2[a[i].first]++;
        cnt2[0]++;
        cnt2[a[i].second+1]--;
      }
    }
  }
  for(int i = 1;i<=n;i++) {
    cnt1[i]+=cnt1[i-1];
    cnt2[i]+=cnt2[i-1];
  }
  int cc=0;
  for(int i = 0;i<n;i++) {
    if(cnt1[i]<=0 or cnt2[i]<=0)cc++;
  }
  return cc;
}
int main () {
  cin.tie(0)->sync_with_stdio(0);
  cin >> n >> m;
  mask.resize(m);
  a.resize(m);
  for(int i = 0;i<m;i++){
    cin >> a[i].first >> a[i].second;
    a[i].first--;
    a[i].second--;
  }
  for(int _ = 0;_<100;_++) {
    long double temp = 100;
    for(int i = 0;i<m;i++)mask[i]=rng()%2;
    int old = eval();
    for(int __ = 0;__<100000;__++) {
      int c = rng()%m;
      mask[c]^=1;
      int nw = eval();
      if(nw==0) {
        for(int i:mask)cout << i;
        cout << "\n";
        return 0;
      }
      long double rn = (long double)(rng()%1000)/1000;
      if(P(old, nw, temp)>rn) {
        old=nw;
      }
      else {
        mask[c]^=1;
      }
      temp*=0.95;
    }
//    cerr << fixed << setprecision(5) << (long double)temp << endl;
  }
  cout << "impossible\n";
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1077 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1232 ms 432 KB Output is correct
11 Correct 1165 ms 432 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1268 ms 436 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 360 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1272 ms 428 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1093 ms 344 KB Output is correct
30 Correct 1091 ms 436 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1046 ms 432 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 1156 ms 432 KB Output is correct
35 Correct 1542 ms 436 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 1469 ms 428 KB Output is correct
39 Correct 0 ms 344 KB Output is correct
40 Correct 1 ms 348 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1077 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1232 ms 432 KB Output is correct
11 Correct 1165 ms 432 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1268 ms 436 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 360 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1272 ms 428 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1093 ms 344 KB Output is correct
30 Correct 1091 ms 436 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1046 ms 432 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 1156 ms 432 KB Output is correct
35 Correct 1542 ms 436 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 1469 ms 428 KB Output is correct
39 Correct 0 ms 344 KB Output is correct
40 Correct 1 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 85 ms 440 KB Output is correct
43 Correct 10 ms 452 KB Output is correct
44 Correct 48 ms 348 KB Output is correct
45 Correct 213 ms 432 KB Output is correct
46 Correct 14 ms 344 KB Output is correct
47 Correct 1 ms 348 KB Output is correct
48 Execution timed out 3075 ms 348 KB Time limit exceeded
49 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1077 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1232 ms 432 KB Output is correct
11 Correct 1165 ms 432 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1268 ms 436 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 360 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1272 ms 428 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1093 ms 344 KB Output is correct
30 Correct 1091 ms 436 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1046 ms 432 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 1156 ms 432 KB Output is correct
35 Correct 1542 ms 436 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 1469 ms 428 KB Output is correct
39 Correct 0 ms 344 KB Output is correct
40 Correct 1 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 85 ms 440 KB Output is correct
43 Correct 10 ms 452 KB Output is correct
44 Correct 48 ms 348 KB Output is correct
45 Correct 213 ms 432 KB Output is correct
46 Correct 14 ms 344 KB Output is correct
47 Correct 1 ms 348 KB Output is correct
48 Execution timed out 3075 ms 348 KB Time limit exceeded
49 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 2652 KB Output is correct
2 Execution timed out 3041 ms 1112 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1077 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1232 ms 432 KB Output is correct
11 Correct 1165 ms 432 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1268 ms 436 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 360 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1272 ms 428 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1093 ms 344 KB Output is correct
30 Correct 1091 ms 436 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1046 ms 432 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 1156 ms 432 KB Output is correct
35 Correct 1542 ms 436 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 1469 ms 428 KB Output is correct
39 Correct 0 ms 344 KB Output is correct
40 Correct 1 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 85 ms 440 KB Output is correct
43 Correct 10 ms 452 KB Output is correct
44 Correct 48 ms 348 KB Output is correct
45 Correct 213 ms 432 KB Output is correct
46 Correct 14 ms 344 KB Output is correct
47 Correct 1 ms 348 KB Output is correct
48 Execution timed out 3075 ms 348 KB Time limit exceeded
49 Halted 0 ms 0 KB -