Submission #144257

#	Time	Username	Problem	Language	Result	Execution time	Memory
144257		SamAnd	Tenis (COI19_tenis)	C++17	18 / 100	117 ms	2444 KiB

tenis

#include <bits/stdc++.h>
using namespace std;
const int N = 1003;
struct ban
{
    int x, y, z;
};

int n, q;
ban a[N];

bool aa[N][N], bb[N][N];

int c[N];
vector<int> v;
void dfs(int x)
{
    c[x] = 1;
    for (int h = 1; h <= n; ++h)
    {
        if (aa[x][h] == true)
        {
            if (!c[h])
                dfs(h);
        }
    }
    v.push_back(x);
}

int k;
void dfs1(int x)
{
    c[x] = k;
    for (int h = 1; h <= n; ++h)
    {
        if (bb[x][h] == true)
        {
            if (!c[h])
                dfs1(h);
        }
    }
}

int qq;
bool cc[N];

void bil()
{
    memset(aa, false, sizeof aa);
    memset(bb, false, sizeof bb);
    for (int i = 1; i <= n; ++i)
    {
        for (int j = 1; j <= n; ++j)
        {
            if (a[i].x <= a[j].x || a[i].y <= a[j].y || a[i].z <= a[j].z)
            {
                aa[i][j] = true;
                bb[j][i] = true;
            }
        }
    }
    memset(c, 0, sizeof c);
    v.clear();
    for (int i = 1; i <= n; ++i)
    {
        if (c[i] == 0)
            dfs(i);
    }
    memset(c, 0, sizeof c);
    k = 0;
    reverse(v.begin(), v.end());
    for (int i = 0; i < v.size(); ++i)
    {
        int x = v[i];
        if (!c[x])
        {
            ++k;
            dfs1(x);
        }
    }
    memset(cc, false, sizeof cc);
    for (int x = 1; x <= n; ++x)
    {
        for (int y = 1; y <= n; ++y)
        {
            if (aa[x][y] == true)
            {
                if (c[x] == c[y])
                    continue;
                cc[c[y]] = true;
            }
        }
    }
    qq = 0;
    for (int i = 1; i <= k; ++i)
    {
        if (cc[i] == false)
            ++qq;
    }
}

int main()
{
    scanf("%d%d", &n, &q);
    for (int i = 1; i <= n; ++i)
    {
        int x;
        scanf("%d", &x);
        a[x].x = i;
    }
    for (int i = 1; i <= n; ++i)
    {
        int x;
        scanf("%d", &x);
        a[x].y = i;
    }
    for (int i = 1; i <= n; ++i)
    {
        int x;
        scanf("%d", &x);
        a[x].z = i;
    }
    bil();
    while (q--)
    {
        int ty;
        scanf("%d", &ty);
        if (ty == 1)
        {
            int x;
            scanf("%d", &x);
            if (qq == 1 && cc[c[x]] == false)
                printf("DA\n");
            else
                printf("NE\n");
        }
        else
        {
            int p, x, y;
            scanf("%d%d%d", &p, &x, &y);
            if (p == 1)
                swap(a[x].x, a[y].x);
            else if (p == 2)
                swap(a[x].y, a[y].y);
            else
                swap(a[x].z, a[y].z);
            bil();
        }
    }
    return 0;
}

Compilation message (stderr)

tenis.cpp: In function 'void bil()':
tenis.cpp:72:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < v.size(); ++i)
                     ~~^~~~~~~~~~
tenis.cpp: In function 'int main()':
tenis.cpp:104:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &q);
     ~~~~~^~~~~~~~~~~~~~~~
tenis.cpp:108:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &x);
         ~~~~~^~~~~~~~~~
tenis.cpp:114:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &x);
         ~~~~~^~~~~~~~~~
tenis.cpp:120:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &x);
         ~~~~~^~~~~~~~~~
tenis.cpp:127:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &ty);
         ~~~~~^~~~~~~~~~~
tenis.cpp:131:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &x);
             ~~~~~^~~~~~~~~~
tenis.cpp:140:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d%d%d", &p, &x, &y);
             ~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 0 / 12
• Subtask 4: 0 / 21
• Subtask 5: 0 / 49