Submission #1125124

#	Time	Username	Problem	Language	Result	Execution time	Memory
1125124		MatteoArcari	Tropical Garden (IOI11_garden)	C++20	Compilation error	0 ms	0 KiB

garden

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

const int lg = 30;

int main() {
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    int n, m, p;
    cin >> n >> m >> p;
    vector<vector<pair<int, int>>> adj(n);
    for (int i = 0; i < n; i++) {
        int a, b;
        cin >> a >> b;
        int sa = adj[a].size();
        int sb = adj[b].size();
        if (sa < 2) adj[a].push_back({b, sb == 0});
        if (sb < 2) adj[b].push_back({a, sa == 0});
    }

    vector<vector<pair<int, int>>> up[2];
    up[0].resize(lg, vector<pair<int, int>>(n));
    up[1].resize(lg, vector<pair<int, int>>(n));

    for (int i = 0; i < n; i++) {
        up[1][0][i] = adj[i][0];
        up[0][0][i] = adj[i][0];
        if (adj[i].size() > 1) {
            up[1][0][i] = adj[i][1];
        }
    }
    for (int i = 1; i < lg; i++) {
        for (int j = 0; j < n; j++) {
            {
            auto [to, s] = up[0][i - 1][j];
            up[0][i][j] = up[s][i - 1][to];
            } {
            auto [to, s] = up[1][i - 1][j];
            up[1][i][j] = up[s][i - 1][to];
            }
        }
    }

    auto get_up_bro = [&](int j, int k) {
        int cur_state = 0;
        for (int i = lg - 1; i >= 0; i--) {
            if ((1 << i) <= k) {
                auto [to, s] = up[cur_state][i][j];
                cur_state = s;
                j = to;
                k -= (1 << i);
            }
        }
        return j;
    };
    
    int q; cin >> q;
    while (q--) {
        int k; cin >> k;
        int ans = 0;
        for (int i = 0; i < n; i++) {
            ans += get_up_bro(i, k) == p;
        }
        cout << ans << '\n';
    }
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccEc1Ma6.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccyVLtZO.o:garden.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccEc1Ma6.o: in function `main':
grader.cpp:(.text.startup+0x3f): undefined reference to `count_routes(int, int, int, int (*) [2], int, int*)'
collect2: error: ld returned 1 exit status