Submission #961446

#TimeUsernameProblemLanguageResultExecution timeMemory
961446vjudge1Lightning Rod (NOI18_lightningrod)C++17
0 / 100
2070 ms217164 KiB
#include <bits/stdc++.h> #pragma optimize("Ofast") #pragma target("avx2") using namespace std; #define ll long long #define ld long double #define pb push_back #define pf push_front #define pii pair<int,int> #define all(v) v.begin(),v.end() #define F first #define S second #define mem(a,i) memset(a,i,sizeof(a)) #define sz(s) (int)s.size() #define y1 yy #define ppb pop_back #define lb lower_bound #define ub upper_bound #define gcd(a,b) __gcd(a,b) #define in insert // #define int ll const int MAX=5e5+5; const int B=90; const int N=105; const int block=400; const int maxB=MAX/B+10; const ll inf=2e18; const int mod=998244353; const int mod1=1e9+9; const ld eps=1e-9; int dx[8]={1,0,-1,0,1,-1,-1,1}; int dy[8]={0,1,0,-1,1,-1,1,-1}; int binpow(int a,int n){ if(!n)return 1; if(n%2==1)return a*binpow(a,n-1)%mod; int k=binpow(a,n/2); return k*k%mod; } int n; vector<pii> v; bool cmp(pii a,pii b){ if(a.F==b.F)return a.S>b.S; return a.F<b.F; } int readInt () { bool minus = false; int result = 0; char ch; ch = getchar(); while (true) { if (ch == '-') break; if (ch >= '0' && ch <= '9') break; ch = getchar(); } if (ch == '-') minus = true; else result = ch-'0'; while (true) { ch = getchar(); if (ch < '0' || ch > '9') break; result = result*10 + (ch - '0'); } if (minus) return -result; else return result; } void solve(){ cin>>n; for(int i=1;i<=n;i++){ int x=readInt(); int y=readInt(); v.pb({x+y,x-y}); } sort(all(v),cmp); stack<int> st; for(int i=0;i<n;i++){ while(!st.empty()&&v[i].S<=st.top())st.pop(); st.push(v[i].S); } cout<<sz(st); } signed main(){ // freopen("help.in","r",stdin); // freopen("help.out","w",stdout); ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); // prec(); int t=1; // cin>>t; while(t--)solve(); }

Compilation message (stderr)

lightningrod.cpp:3: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    3 | #pragma optimize("Ofast")
      | 
lightningrod.cpp:4: warning: ignoring '#pragma target ' [-Wunknown-pragmas]
    4 | #pragma target("avx2")
      |
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