Submission #1149012

#	Time	Username	Problem	Language	Result	Execution time	Memory
1149012		Issa	Remittance (JOI19_remittance)	C++20	100 / 100	373 ms	23936 KiB

remittance

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define ent "\n"

const int maxn = 1e6 + 100;
const ll INF = (ll)1e18 + 100;
const int inf = 1e7 + 100;
const ll MOD = 1e9 + 7;
const int maxl = 16;
const ll P = 31;

int n;
ll a[maxn];
ll b[maxn];
ll d[maxn];
ll c[maxn];

void test(){
	cin >> n;
	ll sum = 0, ok = 1;
	for(int i = 0; i < n; i++){
		cin >> a[i] >> b[i];
		sum += b[i];
		ok &= a[i] == b[i];
	} a[n] = a[0]; b[n] = b[0];
	if(ok){
		cout << "Yes\n";
		return;
	} if(!sum){
		cout << "No\n";
		return;
	}
	for(int i = 0; i < n; i++){
		if(1 & (a[i+1] ^ b[i+1])) c[i] = 1;
	} c[n] = c[0];
	for(int k = 1; k < 50; k++){
		for(int i = 0; i < n; i++){
			if(((c[i] + a[i+1] - b[i+1])>>(k)&1) != (c[i+1]>>(k-1)&1)){
				c[i] |= (1ll<<k);
			}
		} c[n] = c[0];
	} for(int i = 1; i <= n; i++){
		if(a[i] - c[i] * 2 + c[i-1] != b[i]){
			// cout << a[i] << ' ' << b[i] << ' ' << c[i] << ' ' << c[i-1] << endl;
			cout << "No\n";
			return;
		}
	} cout << "Yes\n";
}

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int t; t = 1;
	while(t--) test();
}

• Subtask 1: 15 / 15
• Subtask 2: 40 / 40
• Subtask 3: 45 / 45