Submission #215930

#	Time	Username	Problem	Language	Result	Execution time	Memory
215930		SamAnd	Fire drill (LMIO18_sauga)	C++17	57.52 / 100	800 ms	3064 KiB

sauga

#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
const int N = 1003;

mt19937 rnd(3141);

int tt, n, ss;
vector<int> a[N];

int u[N];

int q;
vector<int> v;
bool c[N];
void dfs(int x)
{
    bool z = false;
    c[x] = true;
    for (int i = 0; i < a[x].size(); ++i)
    {
        int h = a[x][i];
        if (!c[h])
            dfs(h);
        else
            z = true;
    }
    if (z)
        ++q;
    v.push_back(x);
}

int ansq;
vector<int> ans;

int main()
{
    scanf("%d%d%d", &tt, &n, &ss);
    for (int i = 1; i <= n; ++i)
    {
        int q;
        scanf("%d", &q);
        while (q--)
        {
            int x;
            scanf("%d", &x);
            a[i].push_back(x);
        }
    }
    for (int i = 1; i <= n; ++i)
        u[i] = i;
    while ((double)clock() / CLOCKS_PER_SEC < 0.8)
    {
        for (int i = n; i >= 1; --i)
        {
            swap(u[i], u[rnd() % n + 1]);
        }
        memset(c, false, sizeof c);
        v.clear();
        q = 0;
        for (int i = 1; i <= n; ++i)
        {
            int x = u[i];
            if (!c[x])
                dfs(x);
        }
        if (ans.empty() || q < ansq)
        {
            ans = v;
            ansq = q;
        }
    }
    for (int i = 0; i < n; ++i)
        printf("%d\n", ans[i]);
    return 0;
}

Compilation message (stderr)

sauga.cpp: In function 'void dfs(int)':
sauga.cpp:20:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < a[x].size(); ++i)
                     ~~^~~~~~~~~~~~~
sauga.cpp: In function 'int main()':
sauga.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d", &tt, &n, &ss);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sauga.cpp:42:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &q);
         ~~~~~^~~~~~~~~~
sauga.cpp:46:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &x);
             ~~~~~^~~~~~~~~~

• Subtask 1: 57.5150444795 / 100