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Submission #599880

# Submission time Handle Problem Language Result Execution time Memory
599880 2022-07-20T05:47:18 Z starchan Lightning Rod (NOI18_lightningrod) C++17
0 / 100
 323 ms 156876 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define in pair<int, int>
#define f first
#define s second
#define pb push_back
#define pob pop_back
#define INF (int)1e17
#define MX (int)3e5+5
#define fast() ios_base::sync_with_stdio(false); cin.tie(NULL)
inline int readInt()
{
	int x = 0; char ch=getchar_unlocked(); bool st = 1;
	while(ch < '0'  || ch > '9'){if(ch=='-')st=0; ch=getchar_unlocked();}
	while(ch>='0'&&ch<='9'){x = (x<<3)+(x<<1)+ch-'0';ch=getchar_unlocked();}
	return st?x:-x;
}
vector<int> add(1e7+1, 0);
vector<int> sub(1e7+1, 0);
signed main()
{
	fast();
	int n = readInt();
	for(int i = 1; i <= n; i++)
	{
		int x, y;
		x = readInt();
		y = readInt();
		add[i] = x+y;
		sub[i] = y-x;
	}
	for(int i = 2; i <= n; i++)
		add[i] = max(add[i], add[i-1]);
	for(int i = n-1; i >= 1; i--)
		sub[i] = max(sub[i], sub[i+1]);
	int ans = 0;
	for(int i = 1; i <= n; i++)
		ans+=(((i==1)||(add[i] > add[i+1]))&&((i==n)||(sub[i] > sub[i+1])));
	cout << ans;
	return 0;
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 315 ms 156748 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 156844 KB Output is correct
2 Correct 56 ms 156860 KB Output is correct
3 Incorrect 63 ms 156788 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 156844 KB Output is correct
2 Correct 56 ms 156860 KB Output is correct
3 Incorrect 63 ms 156788 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 156844 KB Output is correct
2 Correct 56 ms 156860 KB Output is correct
3 Incorrect 63 ms 156788 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 156844 KB Output is correct
2 Correct 56 ms 156860 KB Output is correct
3 Incorrect 63 ms 156788 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 323 ms 156876 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 315 ms 156748 KB Output isn't correct
2 Halted 0 ms 0 KB -