Submission #1261920

#	Time	Username	Problem	Language	Result	Execution time	Memory
1261920		Canuc80k	3개의 봉우리 (IOI25_triples)	C++20	Compilation error	0 ms	0 KiB

triples

#include "bits/stdc++.h"
using namespace std;
using ll = long long;
using ld = long double;
using ull = unsigned long long;

map<array<ll, 3>, bool> m;

void add(ll i, ll j, ll k) {
    if (j < i || k < j || k < i) return;
    vector<ll> a = {i, j, k};
    vector<ll> b = {H[i], H[j], H[k]};
    sort(b.begin(), b.end());
    for (int i = 0; i < 3; i ++)
        if (a[i] != b[i]) return;
    m[{i, j, k}] = 1;
}

long long count_triples(std::vector<int> H) {
    // #TH: a[k] max
    for (int k = 2; k < H.size(); k ++) {
        int i = k - H[k]; if (i < 0 || H[i] >= H[k]) continue; int j1 = k - H[i], j2 = i + H[i];
        if (j1 < 0 || H[j1] >= H[k] || H[j1] != j1 - i) j1 = -1;
        if (j2 >= H.size() || H[j2] >= H[k] || H[j2] != k - j2) j2 = -1;
        if (j1 != -1) add(i, j1, k); if (j2 != -1) add(i, j2, k);
    }
    cerr << "A[k] max: " << m.size() << endl;

    // #TH: a[i] max
    for (int i = 0; i + 2 < H.size(); i ++) {
        int k = i + H[i]; if (k >= H.size() || H[k] >= H[i]) continue; int j1 = k - H[k], j2 = i + H[k];
        if (j1 < 0 || H[j1] >= H[i] || H[j1] != j1 - i) j1 = -1;
        if (j2 >= H.size() || H[j2] >= H[i] || H[j2] != k - j2) j2 = -1;
        if (j1 != -1) add(i, j1, k); if (j2 != -1) add(i, j2, k);
    }
    cerr << "A[i] max: " << m.size() << endl;
    
    // #TH: a[j] max, j - i = a[i]
    for (int i = 0; i + 2 < H.size(); i ++) {
        int j = i + H[i]; if (j >= H.size() || H[j] <= H[i]) continue; int k = i + H[j];
        if (k >= H.size() || H[k] >= H[j]) k = -1;
        if (k != -1) add(i, j, k);
    }
    cerr << "A[j] max, j - i = a[i]: " << m.size() << endl;

    // #TH: a[j] max, j - i = a[k] && j - i != a[i]
    for (int i = 0; i + 2 < H.size(); i ++) {
        for (int k = i + 2; k < H.size(); k ++) {
            int j = i + H[k]; if (j != k - H[i] || j >= H.size()) continue;
            if (H[i] >= H[j] || H[j] <= H[k] || j - i == H[i]) continue;
            add(i, j, k);
        }
    }
    cerr << "A[j] max, j - i = a[k] && j - i != a[i]: " << m.size() << endl;
    return m.size();
}

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;
}

Compilation message (stderr)

triples.cpp: In function 'void add(ll, ll, ll)':
triples.cpp:12:21: error: 'H' was not declared in this scope
   12 |     vector<ll> b = {H[i], H[j], H[k]};
      |                     ^
triples.cpp:12:37: error: could not convert '{<expression error>, <expression error>, <expression error>}' from '<brace-enclosed initializer list>' to 'std::vector<long long int>'
   12 |     vector<ll> b = {H[i], H[j], H[k]};
      |                                     ^
      |                                     |
      |                                     <brace-enclosed initializer list>
triples.cpp: In function 'std::vector<int> construct_range(int, int)':
triples.cpp:62:1: warning: no return statement in function returning non-void [-Wreturn-type]
   62 | }
      | ^