Submission #170552

#	Time	Username	Problem	Language	Result	Execution time	Memory
170552		SamAnd	Nice sequence (IZhO18_sequence)	C++17	58 / 100	2069 ms	31540 KiB

sequence

#include <bits/stdc++.h>
using namespace std;
const int N = 400005;

int ka()
{
    int x = 0;
    while (1)
    {
        char y = getchar();
        if ('0' <= y && y <= '9')
            x = (x * 10) + (y - '0');
        else
            return x;
    }
}

char uu[12];
void tp(int x)
{
    if (x == 0)
    {
        putchar('0');
        return;
    }
    if (x < 0)
    {
        putchar('-');
        x *= (-1);
    }
    int i = 0;
    while (x)
    {
        uu[i++] = (x % 10) + '0';
        x /= 10;
    }
    for (i = i - 1; i >= 0; --i)
        putchar(uu[i]);
}

int n, m;

vector<int> a[N];

int c[N];
bool dfs(int x)
{
    c[x] = 1;
    for (int i = 0; i < a[x].size(); ++i)
    {
        int h = a[x][i];
        if (c[h] == 1)
            return true;
        if (c[h] == 0)
            if (dfs(h))
                return true;
    }
    c[x] = 2;
    return false;
}

bool stg(int x)
{
    for (int i = 0; i <= x; ++i)
        a[i].clear();
    for (int i = 0; i <= x; ++i)
    {
        if (i + m <= x)
            a[i + m].push_back(i);
        if (i + n <= x)
            a[i].push_back(i + n);
    }
    for (int i = 0; i <= x; ++i)
        c[i] = 0;
    for (int i = 0; i <= x; ++i)
    {
        if (dfs(i))
            return false;
    }
    return true;
}

vector<int> v;
void dfs1(int x)
{
    c[x] = 1;
    for (int i = 0; i < a[x].size(); ++i)
    {
        int h = a[x][i];
        if (c[h])
            continue;
        dfs1(h);
    }
    v.push_back(x);
}

int p[N];
void solv()
{
    //n = ka();
    //m = ka();
    scanf("%d%d", &n, &m);
    int l = min(n, m) - 1, r = N - 1;
    int ans;
    while (l <= r)
    {
        int m = (l + r) / 2;
        if (stg(m))
        {
            ans = m;
            l = m + 1;
        }
        else
            r = m - 1;
    }
    //tp(ans);
    //putchar('\n');
    printf("%d\n", ans);
    //return;
    for (int i = 0; i <= ans; ++i)
        a[i].clear();
    for (int i = 0; i <= ans; ++i)
    {
        if (i + m <= ans)
            a[i + m].push_back(i);
        if (i + n <= ans)
            a[i].push_back(i + n);
    }
    v.clear();
    for (int i = 0; i <= ans; ++i)
        c[i] = 0;
    for (int i = 0; i <= ans; ++i)
    {
        if (!c[i])
            dfs1(i);
    }
    for (int i = 0; i < v.size(); ++i)
        p[v[i]] = i;
    for (int i = 1; i <= ans; ++i)
    {
        tp(p[i] - p[i - 1]);
        putchar(' ');
        //printf("%d ", p[i] - p[i - 1]);
    }
    putchar('\n');
    //printf("\n");
}

int main()
{
    int tt;
    //tt = ka();
    scanf("%d", &tt);
    while (tt--)
    {
        solv();
    }
    return 0;
}

Compilation message (stderr)

sequence.cpp: In function 'bool dfs(int)':
sequence.cpp:49:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < a[x].size(); ++i)
                     ~~^~~~~~~~~~~~~
sequence.cpp: In function 'void dfs1(int)':
sequence.cpp:87:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < a[x].size(); ++i)
                     ~~^~~~~~~~~~~~~
sequence.cpp: In function 'void solv()':
sequence.cpp:137:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < v.size(); ++i)
                     ~~^~~~~~~~~~
sequence.cpp:102:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
sequence.cpp: In function 'int main()':
sequence.cpp:153:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &tt);
     ~~~~~^~~~~~~~~~~

• Subtask 1: 6 / 6
• Subtask 2: 9 / 9
• Subtask 3: 14 / 14
• Subtask 4: 15 / 15
• Subtask 5: 14 / 14
• Subtask 6: 0 / 18
• Subtask 7: 0 / 24