제출 #1290820

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1290820		ecen30	3개의 봉우리 (IOI25_triples)	C++20	컴파일 에러	0 ms	0 KiB

triples

//testing AI code
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

// Part I: Count mythical triples
long long count_triples(const std::vector<int>& H) {
    int N = H.size();
    long long result = 0;
    // Brute-force
    for (int i = 0; i < N; ++i) {
        for (int j = i+1; j < N; ++j) {
            for (int k = j+1; k < N; ++k) {
                std::vector<int> dists = {j-i, k-i, k-j};
                std::vector<int> heights = {H[i], H[j], H[k]};
                std::sort(dists.begin(), dists.end());
                std::sort(heights.begin(), heights.end());
                if (dists == heights)
                    result++;
            }
        }
    }
    return result;
}

// Part II: Construct range with many mythical triples (naive version)
std::vector<int> construct_range(int M, int K) {
    // Example: just construct a strictly increasing sequence
    int N = min(M, 10); // For demonstration, use up to 10 peaks
    std::vector<int> H(N);
    for (int i = 0; i < N; ++i)
        H[i] = i+1; // Heights: 1,2,3,...,N
    return H;
}

// Main function to use grader format for both parts
int main() {
    int mode;
    cin >> mode;
    if (mode == 1) {
        // Part I
        int N;
        cin >> N;
        std::vector<int> H(N);
        for (int i = 0; i < N; ++i)
            cin >> H[i];
        long long ans = count_triples(H);
        cout << ans << endl;
    } else if (mode == 2) {
        // Part II
        int M, K;
        cin >> M >> K;
        std::vector<int> H = construct_range(M, K);
        cout << H.size();
        for (int x : H) cout << " " << x;
        cout << endl;
    }
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

/usr/bin/ld: /tmp/ccbjVte9.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccuGveDW.o:triples.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccbjVte9.o: in function `main':
grader.cpp:(.text.startup+0x367): undefined reference to `count_triples(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status