Submission #725738

#	Time	Username	Problem	Language	Result	Execution time	Memory
725738		josanneo22	Alternating Heights (CCO22_day1problem1)	C++17	4 / 25	300 ms	83888 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define int long long
inline int rd(){
	int x=0,w=1;
	char ch=getchar();
	for(;ch>'9'||ch<'0';ch=getchar()) if(ch=='-') w=-1;
	for(;ch>='0'&&ch<='9';ch=getchar()) x=x*10+ch-'0';
	return x*w;
}

void solve(){
	int n,k,q; cin>>n>>k>>q;
	vector<int> a(n);
	for(auto&x:a) cin>>x;
	int ok[n+1][n+1];
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			ok[i][j]=0;
		}
	}
	for(int i=0;i<n;i++){
		ok[i][i]=1;
		for(int j=i+1;j<n;j++){
			if(a[j]!=a[j-1]) ok[i][j]|=ok[i][j-1];
			else{
				ok[i][j]=0; break;
			}
		}
	}
	for(int queries=0;queries<q;queries++){
		int l,r; cin>>l>>r;
		l--;r--;
		if(ok[l][r]) cout<<"YES\n";
		else cout<<"NO\n";
	}
}
signed main()
{
	ios_base::sync_with_stdio(0); cin.tie(0);
	int tt=1; //cin>>tt;
	while(tt--){
		solve();
	}
}

• Subtask 1: 4 / 4
• Subtask 2: 0 / 6
• Subtask 3: 0 / 7
• Subtask 4: 0 / 8