Submission #923369

#	Time	Username	Problem	Language	Result	Execution time	Memory
923369		Xiaoyang	Advertisement 2 (JOI23_ho_t2)	C++17	0 / 100	21 ms	456 KiB

Main

#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
 
#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long,long long>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl
#define pq priority_queue
#define inf 1ll<<60
#define rep(i,a,b) for (ll i=a;i<(b);i++)
#define MP make_pair
#define SZ(x) (int(x.size()))
#define mod 1000000007
#define ALL(x) x.begin(),x.end()
#define endl "\n"
void inc(ll &a,ll b) {a=(a+b)%mod;}
void dec(ll &a,ll b) {a=(a-b+mod)%mod;}
int prod(ll a,ll b) {return ll(a)*ll(b)%mod;}
int lowbit(ll x) {return x&(-x);}
ll p0w(ll base,ll p) {ll ret=1;while(p>0){if (p%2ll==1ll) ret=ret*base%mod;base=base*base%mod;p/=2ll;}return ret;}
 
signed main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
    ll n;cin>>n;
    stack<pll>s;
  	bool flag;
    rep(i,0,n){
        ll x,y;cin>>x>>y;
        flag=true;
       	while(!s.empty()){
            ll dx=s.top().fi;
            ll dy=s.top().se;
            if(x-dx<dy-y){
                flag=false;
				break;
            }
			if(x-dx<=y-dy)s.pop();
			else break;
        }
        if(flag)s.push({x,y});
    }
    cout<<s.size();
    return 0;
}

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