Submission #1026526

#	Time	Username	Problem	Language	Result	Execution time	Memory
1026526		vjudge1	Bliskost (COI23_bliskost)	C++17	28 / 100	51 ms	72784 KiB

Main

#include <bits/stdc++.h>

using namespace std;

typedef long long lo; 

#define fi first
#define se second
#define endl "\n"
#define pb push_back
#define int long long
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define FOR for(int i=1;i<=n;i++)
#define mid ((start+end)/2)
#define ort ((bas+son)/2)
#define _ << " " <<

const lo inf = 1000000000;
const lo li = 1000005;
const lo mod = 1000000007;

int n,m,a[li],k,flag,t;
int cev;
string s,ss;
vector<int> v;

inline int fark(int x,int y){
	if(x>y)return 26-x+y;
	return y-x;
}

inline char ekle(int x,int y){
	x+=y;
	if(x>'z')x-=26;
	return x;
}

struct segtree{
	array<int,li*4> tree;
	int md=0;
	segtree(int x){
		md=x;
	}
	inline void update(int node,int start,int end,int l,int r,int val){
		if(start>end || start>r || end<l)return ;
		if(start>=l && end<=r){if(md!=start%2)return ;tree[node]+=val;return ;}
		update(node*2,start,mid,l,r,val),update(node*2+1,mid+1,end,l,r,val);
		tree[node]=tree[node*2]+tree[node*2+1];
	}
	inline int query(int node,int start,int end,int l,int r){
		if(start>end || start>r || end<l)return 0;
		if(start>=l && end<=r)return tree[node];
		return query(node*2,start,mid,l,r)+query(node*2+1,mid+1,end,l,r);
	}
};

int32_t main(void){
	fio();
	cin>>n>>k;
	cin>>s>>ss;
	s="%"+s;
	ss="%"+ss;
	char myc=s[n];
	for(int i=1;i<=n-1;i++){
		int at=fark(s[i],ss[i]);
		a[i]=at;
		s[i]=ekle(s[i],at);
		s[i+1]=ekle(s[i+1],at);
	}
	if(s[n]==ss[n]){cout<<"da\n";}
	else cout<<"ne\n";
	segtree st1(1);
	segtree st2(0);
	while(k--){
		int i;char c;
		cin>>i>>c;
		if(i==n)myc=c;
		int val=a[i-1]+st1.query(1,1,n,1,i-2)*(i%2?-1:1)+st2.query(1,1,n,1,i-2)*(i%2?1:-1)+26*100000000000;
		int val2=a[i]+st1.query(1,1,n,1,i-1)*(i%2?1:-1)+st2.query(1,1,n,1,i-1)*(i%2?-1:1)+26*100000000000;
		val%=26;val2%=26;
		c=ekle(c,val);
		int tut=fark(c,ss[i]);
		st1.update(1,1,n,i,i,tut-val2);
		st2.update(1,1,n,i,i,tut-val2);
		a[i]=tut;
		val=a[n-1]+st1.query(1,1,n,1,n-2)*(n%2?-1:1)+st2.query(1,1,n,1,n-2)*(n%2?1:-1)+26*100000000000;
		val%=26;
		//cout<<val _ a[n-1] _ fark(s[n],ss[n])<<" () "<<endl;
		if(val==fark(myc,ss[n]))cout<<"da\n";
		else cout<<"ne\n";
	}
	return 0;
}

• Subtask 1: 7 / 7
• Subtask 2: 8 / 8
• Subtask 3: 13 / 13
• Subtask 4: 0 / 12
• Subtask 5: 0 / 17
• Subtask 6: 0 / 43