Submission #230502

#	Time	Username	Problem	Language	Result	Execution time	Memory
230502		NONAME	NLO (COCI18_nlo)	C++17	110 / 110	974 ms	504 KiB

nlo

#include <bits/stdc++.h>
#define sz(x) int(x.size())
#define in(x) freopen(x, "r", stdin)
#define out(x) freopen(x, "w", stdout)
#define N 100500
#define oo ll(1e16)
#define ft first
#define sd second
#define pb push_back
#define ppb pop_back
#define el '\n'
#define elf endl
#define base ll(1e9 + 7)
using namespace std;
typedef long long ll;
typedef long double ld;

ll n, m, k, a[N], b[N], r[N], res;

ll sqr(ll x) { return x * x; }

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    cin >> n >> m >> k;
    for (int i = 1; i <= k; i++)
        cin >> a[i] >> b[i] >> r[i], a[i]--, b[i]--;

    for (int i = 0; i < n; i++) {
        vector <pair <ll, ll> > v;
        v.clear();
        for (int j = 1; j <= k; j++) {
            if (i < a[j] - r[j] || i > a[j] + r[j])
                continue;

            ll dist = sqrt(sqr(r[j]) - sqr(a[j] - i));

            v.pb({b[j] - dist, j});
            v.pb({b[j] + dist + 1, -j});
        }

        sort(v.begin(), v.end());

        set <ll> s;

        for (int j = 0; j < sz(v); j++) {
            if (!s.empty())
                res += (*s.rbegin()) * (v[j].ft - v[j - 1].ft);

            if (v[j].sd < 0) s.erase(-v[j].sd);
                else s.insert(v[j].sd);
        }
    }

    cout << (n * m * k) - res;
}

• Subtask 1: 110 / 110