Submission #1082576

#	Time	Username	Problem	Language	Result	Execution time	Memory
1082576		Tymond	Advertisement 2 (JOI23_ho_t2)	C++17	0 / 100	1 ms	2396 KiB

Main

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#define fi first
#define se second
#define vi vector<int>
#define vll vector<long long>
#define pii pair<int, int>
#define pll pair<long long, long long>
#define pb push_back
#define mp make_pair
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rng64(chrono::steady_clock::now().time_since_epoch().count());
inline int rand(int l,int r){return uniform_int_distribution<int>(l, r)(rng);}
inline ll rand(ll l,ll r){return uniform_int_distribution<ll>(l, r)(rng64);}
#ifdef DEBUG
auto&operator<<(auto&o,pair<auto,auto>p){return o<<"("<<p.first<<", "<<p.second<<")";}
auto operator<<(auto&o,auto x)->decltype(x.end(),o){o<<"{";int i=0;for(auto e:x)o<<","+!i++<<e;return o<<"}";}
#define debug(X...)cerr<<"["#X"]: ",[](auto...$){((cerr<<$<<"; "),...)<<endl;}(X)
#else
#define debug(...){}
#endif

struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};

const int MAXN = 5e5 + 7;
pll vec[MAXN];
bool bad[MAXN];
int n;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    cin >> n;
    for(int i = 1; i <= n; i++){
        cin >> vec[i].fi >> vec[i].se;
    }

    sort(vec + 1, vec + n + 1);

    ll mx = -1e18;
    for(int i = 1; i <= n; i++){
        if((ll)vec[i].fi + vec[i].se <= mx){
            bad[i] = 1;
        }
        mx = max(mx, (ll)vec[i].fi + vec[i].se);
    }

    mx = 1e18;
    for(int i = n; i >= 1; i--){
        if((ll)vec[i].fi - vec[i].se >= mx){
            bad[i] = 1;
        }
        mx = min(mx, (ll) vec[i].fi - vec[i].se);
    }

    int ans = 0;
    for(int i = 1; i <= n; i++){
        if(!bad[i]){
            ans++;
        }
    }

    cout << ans << '\n';

    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 23
• Subtask 3: 0 / 36
• Subtask 4: 0 / 31