Submission #1319329

#	Time	Username	Problem	Language	Result	Execution time	Memory
1319329		Trisanu_Das	Souvenirs (IOI25_souvenirs)	C++20	Compilation error	0 ms	0 KiB

souvenirs

#include "souvenirs.h"
#include <bits/stdc++.h>
using namespace std;


int N;
long long P0;

bool is_full_suffix(const vector<int>& L, int N) {
    if (L.empty()) return false;
    for (int i = 0; i < (int)L.size(); i++) {
        if (L[i] != L[0] + i) return false;
    }
    return L.back() == N - 1;
}

// Provided by the judge
vector<int> transaction(long long M, long long &R);

int main() {
    cin >> N >> P0;

    vector<long long> suffix_sum(N, -1);
    suffix_sum[0] = -1; // unused
    vector<bool> known(N, false);

    int known_cnt = 0;

    // 1) Literal scanning
    for (long long M = 1; M < P0 && known_cnt < N - 1; M++) {
        long long R;
        vector<int> L = transaction(M, R);

        if (L.empty()) continue;

        if (!is_full_suffix(L, N)) continue;

        int k = L[0];
        if (k == 0) continue; // we don't need suffix starting at 0

        if (!known[k]) {
            suffix_sum[k] = M - R;
            known[k] = true;
            known_cnt++;
        }
    }

    // 2) Recover prices
    vector<long long> P(N);
    P[0] = P0;

    for (int i = N - 1; i >= 1; i--) {
        if (i == N - 1) {
            P[i] = suffix_sum[i];
        } else {
            P[i] = suffix_sum[i] - suffix_sum[i + 1];
        }
    }

    // 3) Buy souvenirs
    for (int i = 1; i < N; i++) {
        for (int cnt = 0; cnt < i; cnt++) {
            long long R;
            transaction(P[i], R);
        }
    }

    return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccW0TFDz.o: in function `main':
stub.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccgcrJVf.o:souvenirs.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccgcrJVf.o: in function `main':
souvenirs.cpp:(.text.startup+0x120): undefined reference to `transaction(long long, long long&)'
/usr/bin/ld: souvenirs.cpp:(.text.startup+0x28b): undefined reference to `transaction(long long, long long&)'
/usr/bin/ld: /tmp/ccW0TFDz.o: in function `main':
stub.cpp:(.text.startup+0x99): undefined reference to `buy_souvenirs(int, long long)'
collect2: error: ld returned 1 exit status