// Be name khoda //
#include <bits/stdc++.h>
#define all(x) x.begin(), x.end()
#define pb push_back
#define fi first
#define se second
#define mp make_pair
typedef long long ll;
using namespace std;
const int maxn5 = 1e6 + 10;
const ll inf = 1e18;
bool mark[maxn5];
ll a[maxn5], b[maxn5];
queue <int> q;
int n;
bool found = false;
void solve(int lev, int cnt){
bool re = true;
for(int i = 0; i < n; i++)
re &= (a[i] == b[i]);
if(re){
found = true;
return;
}
if(cnt == n)
return;
for(int x = 2; x <= a[lev]; x+= 2){
a[lev] -= x;
a[(lev + 1)%n] += x / 2;
solve((lev + 1) % n, 0);
if(found)
return;
a[lev] += x;
a[(lev + 1)%n] -= x / 2;
}
solve((lev + 1)%n, cnt + 1);
}
int main(){
ios_base::sync_with_stdio(false); cin.tie(0);
cin >> n;
ll sum = 0;
for(int i = 0; i < n; i++){
cin >> a[i] >> b[i];
sum += a[i];
}
//solve(0, 0);
//cout << (found ? "Yes" : "No") << endl;
//return 0;
while(sum >= 0){
bool re = true;
for(int i = 0; i < n; i++){
if(a[i] > b[i] && a[i] != 1){
int j = (i + 1) % n;
ll w = (a[i] - b[i]) / 2 + ((a[i] - b[i]) % 2);
a[j] += w;
a[i] -= 2 * w;
sum -= w;
re = false;
}
}
if(re){
for(int i = 0; i < n; i++)
re &= (a[i] == b[i]);
if(!re)
break;
return cout << "Yes" << endl, 0;
}
}
cout << "No" << endl;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
0 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
0 ms |
212 KB |
Output is correct |
| 10 |
Correct |
0 ms |
212 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
0 ms |
340 KB |
Output is correct |
| 13 |
Correct |
0 ms |
212 KB |
Output is correct |
| 14 |
Correct |
0 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
0 ms |
212 KB |
Output is correct |
| 17 |
Correct |
0 ms |
212 KB |
Output is correct |
| 18 |
Correct |
0 ms |
340 KB |
Output is correct |
| 19 |
Correct |
0 ms |
212 KB |
Output is correct |
| 20 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
| 21 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
0 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
0 ms |
212 KB |
Output is correct |
| 10 |
Correct |
0 ms |
212 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
0 ms |
340 KB |
Output is correct |
| 13 |
Correct |
0 ms |
212 KB |
Output is correct |
| 14 |
Correct |
0 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
0 ms |
212 KB |
Output is correct |
| 17 |
Correct |
0 ms |
212 KB |
Output is correct |
| 18 |
Correct |
0 ms |
340 KB |
Output is correct |
| 19 |
Correct |
0 ms |
212 KB |
Output is correct |
| 20 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
| 21 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
0 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
0 ms |
212 KB |
Output is correct |
| 8 |
Correct |
0 ms |
212 KB |
Output is correct |
| 9 |
Correct |
0 ms |
212 KB |
Output is correct |
| 10 |
Correct |
0 ms |
212 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
0 ms |
340 KB |
Output is correct |
| 13 |
Correct |
0 ms |
212 KB |
Output is correct |
| 14 |
Correct |
0 ms |
212 KB |
Output is correct |
| 15 |
Correct |
0 ms |
212 KB |
Output is correct |
| 16 |
Correct |
0 ms |
212 KB |
Output is correct |
| 17 |
Correct |
0 ms |
212 KB |
Output is correct |
| 18 |
Correct |
0 ms |
340 KB |
Output is correct |
| 19 |
Correct |
0 ms |
212 KB |
Output is correct |
| 20 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
| 21 |
Halted |
0 ms |
0 KB |
- |
