#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
const int MAX = 1000007;
ll A[MAX];
int main() {
ios::sync_with_stdio(0); cin.tie(0);
ll N;
cin >> N;
for (int i = 0; i < N; ++i) {
ll a, b;
cin >> a >> b;
A[i] = b - a;
}
for (int t = 0; t < 32; ++t) for (int i = 0; i < N; ++i) {
if (A[i] < 0) {
ll z = abs(A[i]) / 2LL;
A[i] += z * 2;
A[(i + 1) % N] -= z;
}
}
for (int i = 0; i < N; ++i) {
if (A[i]) {
cout << "No";
return 0;
}
}
cout << "Yes";
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
336 KB |
Output is correct |
2 |
Correct |
0 ms |
336 KB |
Output is correct |
3 |
Correct |
1 ms |
336 KB |
Output is correct |
4 |
Correct |
1 ms |
336 KB |
Output is correct |
5 |
Correct |
1 ms |
336 KB |
Output is correct |
6 |
Correct |
1 ms |
336 KB |
Output is correct |
7 |
Correct |
1 ms |
336 KB |
Output is correct |
8 |
Incorrect |
0 ms |
336 KB |
Output isn't correct |
9 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
336 KB |
Output is correct |
2 |
Correct |
0 ms |
336 KB |
Output is correct |
3 |
Correct |
1 ms |
336 KB |
Output is correct |
4 |
Correct |
1 ms |
336 KB |
Output is correct |
5 |
Correct |
1 ms |
336 KB |
Output is correct |
6 |
Correct |
1 ms |
336 KB |
Output is correct |
7 |
Correct |
1 ms |
336 KB |
Output is correct |
8 |
Incorrect |
0 ms |
336 KB |
Output isn't correct |
9 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
336 KB |
Output is correct |
2 |
Correct |
0 ms |
336 KB |
Output is correct |
3 |
Correct |
1 ms |
336 KB |
Output is correct |
4 |
Correct |
1 ms |
336 KB |
Output is correct |
5 |
Correct |
1 ms |
336 KB |
Output is correct |
6 |
Correct |
1 ms |
336 KB |
Output is correct |
7 |
Correct |
1 ms |
336 KB |
Output is correct |
8 |
Incorrect |
0 ms |
336 KB |
Output isn't correct |
9 |
Halted |
0 ms |
0 KB |
- |