Submission #1258528

#	Time	Username	Problem	Language	Result	Execution time	Memory
1258528		SugarCubes69	Triple Peaks (IOI25_triples)	C++20	16.29 / 100	15 ms	2488 KiB

triples

//orz Dominater069

#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;

long long count_triples(std::vector<int> h) {
    ll ans = 0;
    ll N = h.size();

    for(int i=0;i<N;i++){
        int k = h[i]+i,j;
        if(k>=N) continue;
        
        //h[j] = j-i, h[k] = k-j
        j = k-h[k];
        if(i<j && j<k && h[j]==j-i) ans++;

        //h[j] = k-j, h[k] = j-i
        j = h[k]+i;
        if(j==k-h[k]) continue;
        if(i<j && j<k && h[j]==k-j) ans++;
    }

    for(int k=0;k<N;k++){
        int i = k-h[k],j;
        if(i<0) continue;

        //h[i] = j-i, h[j] = k-j
        j = i+h[i];
        if(i<j && j<k && h[j]==k-j) ans++;

        //h[i] = k-j, h[j] = j-i
        j = k-h[i];
        if(j==i+h[i]) continue;
        if(i<j && j<k && h[j]==j-i) ans++;
    }

    return ans;
}
std::vector<int> construct_range(int M, int K) {
    vector<int> res; res.push_back(1);
    for (int i = 1; i < M; i ++) res.push_back(i);
    return res;
}


/*void run_part1() {
  int N;
  assert(1 == scanf("%d", &N));
  std::vector<int> H(N);
  for (int i = 0; i < N; i++)
    assert(1 == scanf("%d", &H[i]));
  fclose(stdin);

  long long T = count_triples(H);

  printf("%lld\n", T);
  fclose(stdout);
}

void run_part2() {
  int M, K;
  assert(2 == scanf("%d %d", &M, &K));
  fclose(stdin);

  std::vector<int> H = construct_range(M, K);

  int N = H.size();
  printf("%d\n", N);
  for (int i = 0; i < N; i++)
    printf("%d%c", H[i], " \n"[i + 1 == N]);
  fclose(stdout);
}


int main() {
  int part;
  assert(1 == scanf("%d", &part));
  if (part == 1)
    run_part1();
  else if (part == 2)
    run_part2();

  return 0;
}*/

• Subtask 0: 0 / 0
• Subtask 1: 0 / 8
• Subtask 2: 0 / 6
• Subtask 3: 0 / 10
• Subtask 4: 11 / 11
• Subtask 5: 0 / 16
• Subtask 6: 0 / 19
• Subtask 7: 3 / 5
• Subtask 8: 1.245 / 5
• Subtask 9: 0.4998 / 5
• Subtask 10: 0.2143 / 5
• Subtask 11: 0.25 / 5
• Subtask 12: 0.0833 / 5