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Submission #137684

# Submission time Handle Problem Language Result Execution time Memory
137684 2019-07-28T08:33:21 Z hamzqq9 Lightning Rod (NOI18_lightningrod) C++14
80 / 100
 2000 ms 79504 KB 
#include<bits/stdc++.h>
#define st first
#define nd second
#define pb push_back
#define ppb pop_back
#define ii pair<int,int>
#define ll long long
#define umin(x,y) x=min(x,y)
#define umax(x,y) x=max(x,y)
#define orta ((bas+son)>>1)
#define sz(x) ((int)x.size())
#define all(x) x.begin(),x.end()
#define inf 2000000000
#define N 500005
#define MOD 1000000007
using namespace std;

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;
}

bitset<10000000> u;

int main() {

	int n;

	//scanf("%d",&n);

	n=readInt();

	vector<ii> a(n);
	int cnt=n;

	for(int i=0;i<n;i++) {

		//scanf("%d %d",&a[i].st,&a[i].nd);

		a[i].st=readInt();
		a[i].nd=readInt();

	}

	int mn=inf;

	for(int i=n-1;i>=0;i--) {

		int val=a[i].st-a[i].nd;

		if(mn<=val) {

			cnt-=!u[i];
			u[i]=1;

		}

		umin(mn,val);

	}

	int mx=-inf;

	for(int i=0;i<n;i++) {

		int val=a[i].st+a[i].nd;

		if(mx>=val) {

			cnt-=!u[i];
			u[i]=1;

		}

		umax(mx,val);

	}

	printf("%d",cnt);

}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1704 ms 76280 KB Output is correct
2 Correct 1710 ms 76024 KB Output is correct
3 Correct 1673 ms 73988 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 296 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 256 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 296 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 380 KB Output is correct
10 Correct 2 ms 256 KB Output is correct

Subtask #4
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 296 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 380 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct

Subtask #5
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 296 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 380 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 55 ms 1828 KB Output is correct
15 Correct 52 ms 1912 KB Output is correct
16 Correct 45 ms 1852 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1525 ms 79504 KB Output is correct
2 Correct 1531 ms 79440 KB Output is correct
3 Correct 1527 ms 77568 KB Output is correct

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1704 ms 76280 KB Output is correct
2 Correct 1710 ms 76024 KB Output is correct
3 Correct 1673 ms 73988 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 296 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 380 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 55 ms 1828 KB Output is correct
18 Correct 52 ms 1912 KB Output is correct
19 Correct 45 ms 1852 KB Output is correct
20 Correct 1525 ms 79504 KB Output is correct
21 Correct 1531 ms 79440 KB Output is correct
22 Correct 1527 ms 77568 KB Output is correct
23 Execution timed out 2050 ms 71240 KB Time limit exceeded
24 Halted 0 ms 0 KB -