Submission #1104507

#	Time	Username	Problem	Language	Result	Execution time	Memory
1104507		HiepVu217	Naval battle (CEOI24_battle)	C++17	0 / 100	24 ms	3152 KiB

Main

#include <bits/stdc++.h>
using namespace std;
const int N = 1e5 + 17;
int n, sank[N], ww;
pair <int, int> p[N];
char dir[N];
vector <tuple <int, int, int>> vtp;
void collide (int i, int j)
{
    char d1 = dir[i], d2 = dir[j];
    auto [x1, y1] = p[i];
    auto [x2, y2] = p[j];
    int w = (abs (x1 - x2) + abs (y1 - y2)) / 2;
    if (d1 == 'N')
    {
        if (d2 == 'S' && y1 - y2 == w * 2)
        {
            vtp.push_back ({w, i, j});
        }
        if (d2 == 'E' && x2 + w == x1 && y1 - w == y2)
        {
            vtp.push_back ({w, i, j});
        }
        if (d2 == 'W' && x2 - w == x1 && y1 - w == y2)
        {
            vtp.push_back ({w, i, j});
        }
    }
    if (d1 == 'S')
    {
        if (d2 == 'N' && y2 - y1 == w * 2)
        {
            vtp.push_back ({w, i, j});
        }
        if (d2 == 'E' && x2 + w == x1 && y1 + w == y2)
        {
            vtp.push_back ({w, i, j});
        }
        if (d2 == 'W' && x2 - w == x1 && y1 + w == y2)
        {
            vtp.push_back ({w, i, j});
        }
    }
    if (d1 == 'E')
    {
        if (d2 == 'W' && y2 - y1 == w * 2)
        {
            vtp.push_back ({w, i, j});
        }
        if (d2 == 'N' && x1 + w == x2 && y2 - w == y1)
        {
            vtp.push_back ({w, i, j});
        }
        if (d2 == 'S' && x1 + w == x2 && y2 + w == y1)
        {
            vtp.push_back ({w, i, j});
        }
    }
    if (d1 == 'W')
    {
        if (d2 == 'E' && y1 - y2 == w * 2)
        {
            vtp.push_back ({w, i, j});
        }
        if (d2 == 'N' && x1 - w == x2 && y2 - w == y1)
        {
            vtp.push_back ({w, i, j});
        }
        if (d2 == 'S' && x1 - w == x2 && y2 + w == y1)
        {
            vtp.push_back ({w, i, j});
        }
    }
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n;
    for (int i = 1; i <= n; ++i)
    {
        cin >> p[i].first >> p[i].second >> dir[i];
    }
    for (int i = 1; i < n; ++i)
    {
        for (int j = i + 1; j <= n; ++j)
        {
            collide (i, j);
        }
    }
    sort (vtp.begin(), vtp.end());
    for (auto [w, u, v]: vtp)
    {
        if (!sank[u] && !sank[v])
        {
            sank[u] = sank[v] = w;
        }
        if (!sank[u] && sank[v] == w)
        {
            sank[u] = w;
        }
        if (!sank[v] && sank[u] == w)
        {
            sank[v] = w;
        }
        ww = w;
    }
    ww = 0;
    for (int i = n; i >= 1; --i)
    {
        if (!sank[i])
        {
            ++ww;
            cout << i << "\n";
        }
    }
    if (!ww)
    {
        cout << 0;
    }
}

• Subtask 0: 0 / 0
• Subtask 1: 0 / 6
• Subtask 2: 0 / 12
• Subtask 3: 0 / 8
• Subtask 4: 0 / 11
• Subtask 5: 0 / 9
• Subtask 6: 0 / 30
• Subtask 7: 0 / 24