Submission #446037

#	Time	Username	Problem	Language	Result	Execution time	Memory
446037		prvocislo	Dominance (CEOI08_dominance)	C++17	100 / 100	18 ms	512 KiB

dominance

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

struct obdl { int r1, c1, r2, c2; };
const ll inf = 1e10;
ll count(ll r1, ll c1, ll r2, ll c2) // spocita pocet platnych bodov, vratane
{
    r1 += inf, c1 += inf, r2 += inf, c2 += inf;
    ll even_rows = r2/2 - (r1-1)/2, odd_rows = r2 - r1 + 1 - even_rows;
    ll even_columns = c2/2 - (c1-1)/2, odd_columns = c2 - c1 + 1 - even_columns;
    return even_rows * even_columns + odd_rows * odd_columns;
}
struct udalost { ll x, y1, y2; int d; };
bool cmp(const udalost &a, const udalost &b) { return a.x < b.x; }
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    int w, h, n;
    cin >> w >> h >> n;
    vector<udalost> e;
    set<int> sy;
    for (int i = 0, x, y, d; i < n; i++)
    {
        char c;
        cin >> c >> x >> y >> d;
        int delta = c == 'W' ? 1 : -1;
        e.push_back({x-y-d, x+y-d, x+y+d+1, delta});
        e.push_back({x-y+d+1, x+y-d, x+y+d+1, -delta});
    }
    for (udalost i : e) sy.insert(i.y1), sy.insert(i.y2);
    vector<int> vy(sy.begin(), sy.end()), sum(vy.size(), 0);
    sort(e.begin(), e.end(), cmp);
    ll cntw = 0, cntb = 0;
    //for (int j = 0; j < vy.size(); j++) cout << vy[j] << " ";
    //cout << endl << "============" << endl;
    for (int i = 0; i < e.size()-1; i++)
    {
        for (int j = 0; j < vy.size(); j++) if (e[i].y1 <= vy[j] && vy[j] < e[i].y2)
            sum[j] += e[i].d;
        for (int j = 0; j < vy.size() - 1; j++)
        {
            ll ok = count(e[i].x, vy[j], e[i+1].x-1, vy[j+1]-1);
            if (sum[j] > 0) cntw += ok;
            if (sum[j] < 0) cntb += ok;
        }
        //for (int j = 0; j < vy.size(); j++) cout << sum[j] << " ";
        //cout << "| " << e[i].x << endl;
    }
    cout << cntw << " " << cntb << "\n";
    return 0;
}

Compilation message (stderr)

dominance.cpp: In function 'int main()':
dominance.cpp:38:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<udalost>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |     for (int i = 0; i < e.size()-1; i++)
      |                     ~~^~~~~~~~~~~~
dominance.cpp:40:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         for (int j = 0; j < vy.size(); j++) if (e[i].y1 <= vy[j] && vy[j] < e[i].y2)
      |                         ~~^~~~~~~~~~~
dominance.cpp:42:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |         for (int j = 0; j < vy.size() - 1; j++)
      |                         ~~^~~~~~~~~~~~~~~

• Subtask 1: 100 / 100