Submission #648699

#	Time	Username	Problem	Language	Result	Execution time	Memory
648699		PoPularPlusPlus	Remittance (JOI19_remittance)	C++17	100 / 100	265 ms	28464 KiB

remittance

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long 
#define pb(e) push_back(e)
#define sv(a) sort(a.begin(),a.end())
#define sa(a,n) sort(a,a+n)
#define mp(a,b) make_pair(a,b)
#define vf first
#define vs second
#define ar array
#define all(x) x.begin(),x.end()
const int inf = 0x3f3f3f3f;
const int mod = 1000000007; 
const double PI=3.14159265358979323846264338327950288419716939937510582097494459230;
bool remender(ll a , ll b){return a%b;}

//freopen("problemname.in", "r", stdin);
//freopen("problemname.out", "w", stdout);

void solve(){
	int n;
	cin >> n;
	int arr[n] , b[n];
	for(int i = 0; i < n; i++)cin >> arr[i] >> b[i];
	bool again;
	do {
		again = 0;
		for(int i = 0; i < n; i++){
			if(arr[i] > b[i] + 1){
				arr[(i + 1)%n] += (arr[i] - b[i])/2;
				arr[i] -= 2 * ((arr[i] - b[i])/2);
				again = 1;
			}
		}
	}while(again);
	for(int i = 0; i < n; i++){
		//cout << arr[i] << ' ';
		if(arr[i] < b[i]){
			cout << "No\n";
			return;
		}
	}
	bool pos = 1 , pos1 = 1 , pos2 = 0;
	for(int i = 0; i < n; i++){
		pos &= (arr[i] == b[i]);
		pos1 &= (arr[i] == b[i] + 1);
		pos2 |= (b[i] > 0);
	}
	pos1 &= pos2;
	if(pos || pos1)cout << "Yes\n";
	else cout << "No\n";
}

int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
	//int t;cin >> t;while(t--)
	solve();
	return 0;
}

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