oj.uz

Submission #123094

# Submission time Handle Problem Language Result Execution time Memory
123094 2019-06-30T08:30:48 Z mechfrog88 Lightning Rod (NOI18_lightningrod) C++14
0 / 100
 2000 ms 161076 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#pragma GCC optimize("unroll-loops,no-stack-protector")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
 
using namespace __gnu_pbds;
using namespace std;
 
template <typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
 
typedef long long ll;
typedef long double ld;	

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	ll n;
	scanf("%lld",&n);
	vector <pair<ll,ll>> arr(n);
	for (int z=0;z<n;z++){
		scanf("%lld %lld",&arr[z].first,&arr[z].second);
		arr[z].first -= arr[z].second;
		arr[z].second += arr[z].first;
	}
	stack <pair<ll,ll>> s;
	for (int z=0;z<n;z++){
		if (s.empty()){
			s.push(arr[z]);
		}
		if (s.top().first <= arr[z].first && arr[z].second <= s.top().second) continue;
		else{
			while (arr[z].first <= s.top().first && s.top().second <= arr[z].second){
				s.pop();
				if (s.size() == 0) break;
			}
			s.push(arr[z]);
		}
	}
	printf("%lld",ll(s.size()));
}

Compilation message

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:20:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld",&n);
  ~~~~~^~~~~~~~~~~
lightningrod.cpp:23:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld %lld",&arr[z].first,&arr[z].second);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2066 ms 152256 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Incorrect 2 ms 376 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Incorrect 2 ms 376 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Incorrect 2 ms 376 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Incorrect 2 ms 376 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2061 ms 161076 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2066 ms 152256 KB Time limit exceeded
2 Halted 0 ms 0 KB -