Submission #1057550

#	Time	Username	Problem	Language	Result	Execution time	Memory
1057550		beaconmc	Gift Exchange (JOI24_ho_t4)	C++14	8 / 100	58 ms	7000 KiB

Main

#include <bits/stdc++.h>
 
typedef long long ll;
#define FOR(i,x,y) for(ll i=x; i<y; i++)
#define FORNEG(i,x,y) for(ll i=x; i>y; i--)
 
using namespace std;


int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	ll n;
	cin >> n;
	vector<ll> vals(n), req(n);
	FOR(i,0,n) cin >> vals[i];
	FOR(i,0,n) cin >> req[i];

	vector<bool> visited(n);
	vector<bool> ending(n);
	vector<bool> starting(n);
	ending[0] = 1;

	FORNEG(i, n-1, 0){
		if (visited[i] == 0) starting[i] = 1;
		if (vals[i-1] >= req[i]) visited[i] = 1, visited[i-1] = 1;
		else ending[i] = 1;
	}
	vector<ll> pref(n);
	pref[0] = visited[0];
	FOR(i,1,n) pref[i] = pref[i-1] + visited[i];


	ll q;
	cin >> q;
	FOR(i,0,q){
		ll a,b;
		cin >> a >> b;
		a--;b--;
		ll sus = pref[b] - pref[a] + visited[a];
		if (sus == (b-a+1) && !ending[b] && !starting[a]) cout << "Yes" << "\n";
		else cout << "No" << "\n";
	}


}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 5
• Subtask 3: 0 / 10
• Subtask 4: 0 / 31
• Subtask 5: 8 / 8
• Subtask 6: 0 / 12
• Subtask 7: 0 / 18
• Subtask 8: 0 / 12