Submission #626779

#	Time	Username	Problem	Language	Result	Execution time	Memory
626779		MatBad	Lamps (JOI19_lamps)	C++14	4 / 100	19 ms	3356 KiB

lamp

#include<bits/stdc++.h>
//#pragma GCC optimize ("O2,unroll-loops")
#pragma GCC optimize("no-stack-protector,fast-math")
using namespace std;
#define F first
#define S second
#define pb push_back
#define ppb pop_back
#define lb lower_bound
#define ub upper_bound
#define pc __builtin_popcount
#define cl __builtin_clz
#define FOR(i,a,b) for(int i=a;i<=b;i++)
#define FORR(i,a,b) for(int i=a;i>=b;i--)
#define debug(x) cerr<<#x<<" : &"<<x<<"&\n"
#define wall() cerr<<'\n'<<"-------------------------------\n"
typedef long long ll;
typedef long double ld;
typedef pair<int , int> pii;
typedef pair<bool , pii> piii;

const int
	MX=2e5+5,
	M=600,
	MOD = 1e9+7, 
	inf = 1e9+20, 
	//infl = 1e16,
	LOG = 18,
	A = 27,
	del = 10067;

int n;




int main(){
    ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
	string s;
	cin>>n;
	cin>>s;
	s.clear();
	FOR(i, 1, n){
		char c;
		cin>>c;
		if(!s.empty() and c==s.back()) continue;
		s.pb(c);
	}
	if(s.back()=='0') s.ppb();
	cout<<((int)s.size()+1)/2<<'\n';
}

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