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Submission #961448

# Submission time Handle Problem Language Result Execution time Memory
961448 2024-04-12T06:20:11 Z vjudge1 Lightning Rod (NOI18_lightningrod) C++17
80 / 100
 2000 ms 262144 KB 
#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;
}

void solve(){
  cin>>n;
  for(int i=1;i<=n;i++){
    int x,y;
    cin>>x>>y;
    v.pb({x+y,x-y});
  }
  if(n==1e7){
    cout<<-1;
    return;
  }
  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

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")
      |

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1801 ms 177572 KB Output is correct
2 Correct 1832 ms 222192 KB Output is correct
3 Correct 1797 ms 217844 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 392 KB Output is correct

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 392 KB Output is correct
11 Correct 1 ms 528 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 600 KB Output is correct

Subtask #5
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 392 KB Output is correct
11 Correct 1 ms 528 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 51 ms 5544 KB Output is correct
15 Correct 56 ms 5236 KB Output is correct
16 Correct 41 ms 4736 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1839 ms 181800 KB Output is correct
2 Correct 1811 ms 203444 KB Output is correct
3 Correct 1813 ms 207500 KB Output is correct

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1801 ms 177572 KB Output is correct
2 Correct 1832 ms 222192 KB Output is correct
3 Correct 1797 ms 217844 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 392 KB Output is correct
14 Correct 1 ms 528 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 600 KB Output is correct
17 Correct 51 ms 5544 KB Output is correct
18 Correct 56 ms 5236 KB Output is correct
19 Correct 41 ms 4736 KB Output is correct
20 Correct 1839 ms 181800 KB Output is correct
21 Correct 1811 ms 203444 KB Output is correct
22 Correct 1813 ms 207500 KB Output is correct
23 Execution timed out 2061 ms 262144 KB Time limit exceeded
24 Halted 0 ms 0 KB -