Submission #207825

#	Time	Username	Problem	Language	Result	Execution time	Memory
207825		Segtree	Street Lamps (APIO19_street_lamps)	C++14	20 / 100	8 ms	788 KiB

street_lamps

#include<iostream>
#include<algorithm>
#include<vector>
#include<queue>
#include<set>
#include<unordered_set>
using namespace std;
typedef long long ll;
#define rep(i,n) for(int i=0;i<n;i++)
#define chmin(a,b) a=min(a,b)
#define chmax(a,b) a=max(a,b)
#define all(x) x.begin(),x.end()
ll n,q;
string s[110];
int main(){
	cin>>n>>q;
	cin>>s[0];
	for(int t=1;t<=q;t++){
		s[t]=s[t-1];
		string typ; cin>>typ;
		if(typ=="query"){
			ll a,b; cin>>a>>b; a--,b--;
			ll ans=0;
			for(int i=0;i<t;i++){
				ll cnt=0;
				for(int j=a;j<b;j++){
					if(s[i][j]=='0')cnt++;
				}
				ans+=(cnt==0);
			}
			cout<<ans<<endl;
		}
		if(typ=="toggle"){
			ll x; cin>>x; x--;
			if(s[t][x]=='0')s[t][x]='1';
			else s[t][x]='0';
		}
	}
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20