Submission #874073

#	Time	Username	Problem	Language	Result	Execution time	Memory
874073		vjudge1	Lamps (JOI19_lamps)	C++17	4 / 100	4 ms	2808 KiB

lamp

// in the name of God
#include<bits/stdc++.h>
using namespace std;
#define ll int
#define int long long
#define fast() ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define GCD(a, b) __gcd(a, b)
#define maxl *max_element
#define minl *min_element
#define ff first
#define ss second
#define pb(x) push_back(x)
#define all(x) x.begin(), x.end()
#define mmt make_pair
#define endl '\n'
#pragma GCC optimize("Ofast")
#pragma GCC optimize("fast-math")
//#pragma GCC target ("avx2")
#pragma GCC optimization ("O4")
#pragma GCC optimization ("unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,tune=native")
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int mod = 1e9 + 9, maxn = 1e5 + 10, inf = 1e18 + 1, lg = 40, pp = 4447;

vector<int> a, b;
string s1, s2;
int n;

signed main(){
    fast();
	cin >> n >> s1 >> s2;	
	int ans = 0;
	if(s2[0] == '1') ans = 1;
	for(int i = 0; i < n; ++i){
		if(s2[i] == '1' && s2[i - 1] == '0') ans++;
	}
	cout << ans;
}
// The sea will come out of the darkness
// and the people of the sea will return to their homes
// There is no time left. be sure!!

Compilation message (stderr)

lamp.cpp:19: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
   19 | #pragma GCC optimization ("O4")
      | 
lamp.cpp:20: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
   20 | #pragma GCC optimization ("unroll-loops")
      |

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