Submission #1252394

#	Time	Username	Problem	Language	Result	Execution time	Memory
1252394		chr34	Triple Peaks (IOI25_triples)	C++20	0 / 100	2095 ms	1860 KiB

triples

#include <bits/stdc++.h>

using namespace std;

//#define int long long
#define endl "\n"
#define dbg(x) cout << #x << " = " << (x) << endl;
const long long INF = 1e18;
const int MAXN = 1e6 + 10;
const int MOD = 1e9 + 7;

bool match(vector<int> a, vector<int> b){
	sort(a.begin(), a.end());
	sort(b.begin(), b.end());
	
	for(int i = 0; i < 3; ++i) if(a[i] != b[i]) return false;
	
	return true;
}

long long count_triples(vector<int> h) {
    int n = h.size();
    long long count = 0;

   	for(int j = 0; j < n; ++j){
   		for(int a = 0; a < j; ++a){
   			for(int b = 0; j + b < n; ++b){
   				int i = j - a;
   				int k = j + b;
   				
   				vector<int> first = {a, b, a + b};
   				vector<int> second = {h[i], h[j], h[k]};
   				
   				if(match(first, second)) count++;
   			}
   		}
   	}

	return count;
}

vector<int> construct_range(int m, int k){
	return {};
}

/*int main(){
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	//freopen("input.in", "r", stdin);
	//freopen("input.out", "w", stdout);    
	cout<<count_triples({4, 1, 4, 3, 2, 6, 1});
    return 0;
}*/

• Subtask 0: 0 / 0
• Subtask 1: 0 / 8
• Subtask 2: 0 / 6
• Subtask 3: 0 / 10
• Subtask 4: 0 / 11
• Subtask 5: 0 / 16
• Subtask 6: 0 / 19
• Subtask 7: 0 / 5
• Subtask 8: 0 / 5
• Subtask 9: 0 / 5
• Subtask 10: 0 / 5
• Subtask 11: 0 / 5
• Subtask 12: 0 / 5