Submission #1249817

#	Time	Username	Problem	Language	Result	Execution time	Memory
1249817		kduckp	Triple Peaks (IOI25_triples)	C++20	Compilation error	0 ms	0 KiB

triples

#include "triples.h"
#include <vector>
#include <algorithm>
using namespace std;

long long count_triples(std::vector<int> H) {
    long long res = 0;
    int n = H.size();

    if (n <= 100) {
        for (int i = 0; i < n; i++)
            for (int j = i + 1; j < n; j++)
                for (int k = j + 1; k < n; k++) {
                    vector<int> height = {H[i], H[j], H[k]};
                    vector<int> dist = {j - i, k - i, k - j};
                    sort(height.begin(), height.end());
                    sort(dist.begin(), dist.end());
                    if (height == dist) res++;
                }
        return res;
    }

    bool small_value = true;
    for (int h : H)
        if (h > 10) {
            small_value = false;
            break;
        }

    if (small_value) {
        vector<vector<int>> pos(11);
        for (int i = 0; i < n; ++i)  pos[H[i]].push_back(i);
        int res = 0;
        for(int i = 1; i <= 30; i++)
        {
            for(int j = i + 1; j <= 30; j++)
            {
                for(int  k = j + 1; k <= 30; k++)
                {
                    vector<int> idx = {j - i, k - i, k - j};
                    sort(idx.begin(), idx.end());
                    vector<int> height = {H[i], H[j], H[k]};
                    sort(height.begin(), height.end());
                    if(idx == height)res++;

                }
            }
        }
        cout<<res;
    }

    return 0;
}

std::vector<int> construct_range(int M, int K) {
    return {1, 1, 2};
}

Compilation message (stderr)

triples.cpp: In function 'long long int count_triples(std::vector<int>)':
triples.cpp:49:9: error: 'cout' was not declared in this scope
   49 |         cout<<res;
      |         ^~~~
triples.cpp:4:1: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    3 | #include <algorithm>
  +++ |+#include <iostream>
    4 | using namespace std;