oj.uz

Submission #673801

# Submission time Handle Problem Language Result Execution time Memory
673801 2022-12-22T05:15:59 Z sudheerays123 Lightning Rod (NOI18_lightningrod) C++17
7 / 100
 1421 ms 262144 KB 
#include<bits/stdc++.h>
using namespace std;
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define ll long long int
const ll N = 100+5 , INF = 1e18 , MOD = 1e9+7;

bool inside(ll x1 , ll y1 , ll x2 , ll y2){
	return (abs(x2-x1) <= (y2-y1));
}

void solve(){

	ll n;
	cin >> n;

	vector<pair<ll,ll>> a(n+5);
	for(ll i = 1; i <= n; i++) cin >> a[i].first >> a[i].second;

	vector<ll> left(n+5) , right(n+5,INF);

	for(ll i = 1; i <= n; i++){
		for(ll j = i; j >= 1; j--){
			if(inside(a[j].first,a[j].second,a[i].first,a[i].second)) left[i] = j;
			else break;
		}
	}

	for(ll i = 1; i <= n; i++){
		for(ll j = i; j <= n; j++){
			if(inside(a[j].first,a[j].second,a[i].first,a[i].second)) right[i] = j;
			else break;
		}
	}

	vector<ll> dp(n+5,INF);
	
	dp[0] = 0;
	dp[1] = 1;

	for(ll i = 1; i <= n; i++){
		dp[i] = min(dp[i],dp[left[i]-1]+1);
		dp[right[i]] = min(dp[right[i]],dp[i]);
	}

	cout << dp[n];
}

int main(){

	fast;

	ll tc = 1;
	// cin >> tc;
	while(tc--) solve();

	return 0;
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Runtime error 1395 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 280 KB Output is correct
9 Incorrect 1 ms 212 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 280 KB Output is correct
9 Incorrect 1 ms 212 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 280 KB Output is correct
9 Incorrect 1 ms 212 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1421 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 1395 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -