Submission #406461

#	Time	Username	Problem	Language	Result	Execution time	Memory
406461		Fidisk	Lightning Rod (NOI18_lightningrod)	C++14	40 / 100	2089 ms	262144 KiB

Main

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

#define oo 1e15
#define fi first
#define se second
#define sp(iiii) setprecision(iiii)
#define IO ios_base::sync_with_stdio(false); cin.tie(0)
#define ms(aaaa,xxxx) memset(aaaa,xxxx,sizeof(aaaa))
#define cntbit(xxxx) __builtin_popcount(xxxx)
#define getbit(xxxx,aaaa) ((xxxx>>(aaaa-1))&1)

typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<pair<int,int>,int> piii;
typedef pair<long long,long long> pll;
typedef pair<pair<long long,long long>,long long> plll;
typedef pair<pair<long long,long long>,pair<long long,long long>> pllll;
typedef pair<pair<long long,long long>,bool> pllb;

const ll base=361;
const ll mod=998244353;
const ld eps=1e-5;
const ll maxn=1e9+9;

int n,i,last,res;
pii b[10000009],a[10000009];

int main(){
    IO;
    cin>>n;
    for (i=1;i<=n;i++) {
        cin>>a[i].fi>>a[i].se;
        b[i]={a[i].fi+a[i].se,a[i].fi-a[i].se};
    }
    sort(b+1,b+n+1);
    last=2e9+7;
    for (i=n;i>=1;i--) {
        if (b[i].se<last) {
            res++;
            last=b[i].se;
        }
    }
    cout<<res<<'\n';
}

• Subtask 1: 0 / 4
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 0 / 26
• Subtask 6: 0 / 10
• Subtask 7: 0 / 20