제출 #1249889

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1249889		kduckp	3개의 봉우리 (IOI25_triples)	C++20	컴파일 에러	0 ms	0 KiB

triples

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

bool cmp(pair<int, int> a, pair<int, int> b)
{
    return a.first > b.first;
}
long long count_triples(vector<int> H) {
    int n = H.size();
    long long res = 0;

    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> h = {H[i], H[j], H[k]};
                    vector<int> d = {j - i, k - i, k - j};
                    sort(h.begin(), h.end());
                    sort(d.begin(), d.end());
                    if (h == d) res++;
                }
        return res;
    }
    bool small_value = true;
    for (int h : H)
        if (h > 10) {
            small_value = false;
            break;
        }

    if (small_value) {
        for (int i = 0; i < n; ++i)
            for (int j = i + 1; j < min(n, i + 11); ++j)
                for (int k = j + 1; k < min(n, i + 22); ++k) {
                    vector<int> h = {H[i], H[j], H[k]};
                    vector<int> d = {j - i, k - i, k - j};
                    sort(h.begin(), h.end());
                    sort(d.begin(), d.end());
                    if (h == d) res++;
                }
        return res;
    }
    if (n <= 2000) {
    unordered_map<int, vector<int>> pos;
    for (int i = 0; i < n; ++i)
        pos[H[i]].push_back(i);

    for (int i = 0; i < n; ++i) {
        for (int j = i + 1; j < n; ++j) {
            int d1 = j - i;
            for (int h3 = 1; h3 <= 2 * d1; ++h3) {
                vector<int> h = {H[i], H[j], h3};
                vector<int> d = {j - i, 0, 0};
                if (!pos.count(h3)) continue;
                const auto& indices = pos[h3];
                auto it = upper_bound(indices.begin(), indices.end(), j);
                for (; it != indices.end(); ++it) {
                    int k = *it;
                    d[1] = k - i;
                    d[2] = k - j;
                    sort(h.begin(), h.end());
                    sort(d.begin(), d.end());
                    if (h == d)
                        res++;
                }
            }
        }
    }
    return res;
}

        return res;
    }

    unordered_map<int, vector<int>> height_positions;
    for (int i = 0; i < n; i++) {
        height_positions[H[i]].push_back(i);
    }

    for (int i = 0; i < min(n, 1000); ++i) {
        for (int j = i + 1; j < min(n, i + 1000); ++j) {
            for (int k = j + 1; k < min(n, i + 2000); ++k) {
                vector<int> h = {H[i], H[j], H[k]};
                vector<int> d = {j - i, k - i, k - j};
                sort(h.begin(), h.end());
                sort(d.begin(), d.end());
                if (h == d) res++;
            }
        }
    }

    return res;
}

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

컴파일 시 표준 에러 (stderr) 메시지

triples.cpp:79:5: error: expected unqualified-id before 'for'
   79 |     for (int i = 0; i < n; i++) {
      |     ^~~
triples.cpp:79:25: error: 'n' was not declared in this scope
   79 |     for (int i = 0; i < n; i++) {
      |                         ^
triples.cpp:79:25: error: 'n' was not declared in this scope
triples.cpp:79:25: error: 'n' was not declared in this scope
triples.cpp:79:25: error: 'n' was not declared in this scope
triples.cpp:79:25: error: 'n' was not declared in this scope
triples.cpp:79:25: error: 'n' was not declared in this scope
triples.cpp:79:25: error: 'n' was not declared in this scope
triples.cpp:79:25: error: 'n' was not declared in this scope
triples.cpp:79:25: error: 'n' was not declared in this scope
triples.cpp:79:21: error: 'i' does not name a type
   79 |     for (int i = 0; i < n; i++) {
      |                     ^
triples.cpp:79:28: error: 'i' does not name a type
   79 |     for (int i = 0; i < n; i++) {
      |                            ^
triples.cpp:83:5: error: expected unqualified-id before 'for'
   83 |     for (int i = 0; i < min(n, 1000); ++i) {
      |     ^~~
triples.cpp:83:29: error: 'n' was not declared in this scope
   83 |     for (int i = 0; i < min(n, 1000); ++i) {
      |                             ^
triples.cpp:83:29: error: 'n' was not declared in this scope
triples.cpp:83:29: error: 'n' was not declared in this scope
triples.cpp:83:29: error: 'n' was not declared in this scope
triples.cpp:83:29: error: 'n' was not declared in this scope
triples.cpp:83:29: error: 'n' was not declared in this scope
triples.cpp:83:29: error: 'n' was not declared in this scope
triples.cpp:83:29: error: 'n' was not declared in this scope
triples.cpp:83:29: error: 'n' was not declared in this scope
triples.cpp:83:21: error: 'i' does not name a type
   83 |     for (int i = 0; i < min(n, 1000); ++i) {
      |                     ^
triples.cpp:83:39: error: expected unqualified-id before '++' token
   83 |     for (int i = 0; i < min(n, 1000); ++i) {
      |                                       ^~
triples.cpp:95:5: error: expected unqualified-id before 'return'
   95 |     return res;
      |     ^~~~~~
triples.cpp:96:1: error: expected declaration before '}' token
   96 | }
      | ^