Submission #1249677

#	Time	Username	Problem	Language	Result	Execution time	Memory
1249677		QwertyPi	Triple Peaks (IOI25_triples)	C++20	8 / 100	2096 ms	3400 KiB

triples

#include "triples.h"
#include <bits/stdc++.h>

#define int long long

using namespace std;

const int N_MAX = 2e5 + 11;
int N;
int H[N_MAX];

bool in(int x) {
    return 0 <= x && x < N;
}

bool check(int a, int b, int c) {
    return multiset<int>{H[a], H[b], H[c]} == multiset<int>{abs(a - b), abs(a - c), abs(b - c)};
}

int count_triples(vector<int32_t> H) {
    N = H.size();
    for (int i = 0; i < N; i++) ::H[i] = H[i];
    int ans = 0;

    for (int a = 0; a < N; a++) {
        for (int b = a + 1; b < N; b++) {
            for (int c = b + 1; c < N; c++) {
                if (check(a, b, c)) ans++;
            }
        }
    }

    set<tuple<int>> S;
    for (int i = 0; i < N; i++) {
        int a = i;
        if (in(a - H[a])) {
            int b = a - H[a];

        }
    }

    return ans;
}

vector<int32_t> construct_range(int32_t M, int32_t K) {
    return {1, 1, 1};
}

• Subtask 0: 0 / 0
• Subtask 1: 8 / 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