Submission #931518

#	Time	Username	Problem	Language	Result	Execution time	Memory
931518		Pring	Advertisement 2 (JOI23_ho_t2)	C++14	100 / 100	122 ms	18064 KiB

Main

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

#ifdef MIKU
#define debug(x...) cout << "[" << #x << "] : ", dout(x)
void dout() { cout << endl; }
template <typename T, typename ...U>
void dout(T t, U ...u) { cout << t << (sizeof...(u) ? ", " : ""); dout(u...); }
#else
#define debug(...) 39
#endif

#define int long long
#define fs first
#define sc second
#define mp make_pair
#define FOR(i, j, k) for (int i = j, Z = k; i < Z; i++)
typedef pair<int, int> pii;

const int MXN = 500005;
int n;
pii p[MXN];
bitset<MXN> l, r;

void PRE_L() {
    l[0] = true;
    int now = LLONG_MIN;
    FOR(i, 1, n + 1) {
        now = max(now, p[i - 1].fs + p[i - 1].sc);
        l[i] = (p[i].fs + p[i].sc > now);
    }
}

void PRE_R() {
    r[n - 1] = true;
    int now = LLONG_MAX;
    for (int i = n - 2; i >= 0; i--) {
        now = min(now, p[i + 1].fs - p[i + 1].sc);
        r[i] = (p[i].fs - p[i].sc < now);
    }
}

void miku() {
    cin >> n;
    FOR(i, 0, n) cin >> p[i].fs >> p[i].sc;
    sort(p, p + n);
    debug();
    n = unique(p, p + n) - p;
    PRE_L();
    PRE_R();
    int ans = 0;
    FOR(i, 0, n) if (l[i] && r[i]) ans++;
    cout << ans << '\n';
}

int32_t main() {
    cin.tie(0) -> sync_with_stdio(false);
    cin.exceptions(iostream::failbit);
    miku();
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void miku()':
Main.cpp:10:20: warning: statement has no effect [-Wunused-value]
   10 | #define debug(...) 39
      |                    ^~
Main.cpp:47:5: note: in expansion of macro 'debug'
   47 |     debug();
      |     ^~~~~

• Subtask 1: 10 / 10
• Subtask 2: 23 / 23
• Subtask 3: 36 / 36
• Subtask 4: 31 / 31