Submission #1214057

#	Time	Username	Problem	Language	Result	Execution time	Memory
1214057		nibert	Hieroglyphs (IOI24_hieroglyphs)	C++20	Compilation error	0 ms	0 KiB

hieroglyphs

#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>
using namespace std;

vector<int> ucs(vector<int> A, vector<int> B) {
    int N = A.size(), M = B.size();
    vector<vector<int>> dp(N + 1, vector<int>(M + 1, 0));
    
    for (int i = N - 1; i >= 0; --i) {
        for (int j = M - 1; j >= 0; --j) {
            if (A[i] == B[j]) {
                dp[i][j] = 1 + dp[i + 1][j + 1];
            } else {
                dp[i][j] = max(dp[i + 1][j], dp[i][j + 1]);
            }
        }
    }

    vector<int> lcs;
    int i = 0, j = 0;
    bool multiple = false;

    while (i < N && j < M) {
        if (A[i] == B[j]) {
            lcs.push_back(A[i]);
            i++;
            j++;
        } else if (dp[i + 1][j] == dp[i][j] && dp[i][j + 1] == dp[i][j]) {
            multiple = true;
            break;
        } else if (dp[i + 1][j] == dp[i][j]) {
            i++;
        } else {
            j++;
        }
    }

    if (multiple) return {-1};
    return lcs;
}

int main(){
    ifstream input("input.txt");
    ofstream output("output.txt");  
    int N, M;
    input >> N >> M;
    vector<int> A(N), B(M);
    for (int i = 0; i < N; ++i) input >> A[i];
    for (int i = 0; i < M; ++i) input >> B[i];
    vector<int> result = ucs(A, B);
    output << result.size() << "\n";
    for (int value : result) {
        output << value << " ";
    }
    output << "\n";
    input.close();
    output.close(); 
    return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccn4xJmE.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc4LPL4v.o:hieroglyphs.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status