Submission #376180

#	Time	Username	Problem	Language	Result	Execution time	Memory
376180		8e7	Lamps (JOI19_lamps)	C++14	4 / 100	8 ms	2840 KiB

lamp

//Challenge: Accepted
#include <iostream>
#include <algorithm>
#include <vector>
#include <utility>
#include <set>
#define ll long long
#define maxn 200005
#define pii pair<int, ll>
#define ff first
#define ss second
#define mod 1000000007
#define io ios_base::sync_with_stdio(0);cin.tie(0);
using namespace std;
string a, b;
int main() {
	io
	int n;
	cin >> n;
	cin >> a >> b;
	int cur = 0, cnt = 0;
	for (int i = 0;i < n;i++) {
		if (b[i] - '0' != cur) {
			cur ^= 1;
			cnt++;
		}
	}
	if (b[n - 1] == '0') cnt--;
	cout << (cnt + 1) / 2 << "\n";
}
/*
6
000000
001110
 */

• Subtask 1: 0 / 6
• Subtask 2: 0 / 41
• Subtask 3: 4 / 4
• Subtask 4: 0 / 49