#include <iostream>
using namespace std;
#define rep(i, a, b) for (auto i = (a); i < (b); ++i)
const int N = 1 << 20;
int a[N], b[N];
#pragma GCC optimize ("trapv")
signed main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n; cin >> n;
rep(i, 0, n) cin >> a[i] >> b[i];
bool fine = false;
rep(i, 0, n) if (b[i] != 0) fine = true;
if (!fine) {
rep(i, 0, n) if (a[i] != 0) return cout << "No", 0;
return cout << "Yes", 0;
}
bool flow = true;
while (flow) {
flow = false;
rep(i, 0, n) {
if (a[i] <= b[i]) continue;
flow = true;
int del = (a[i] - b[i] + 1) / 2;
a[i] -= 2 * del;
a[(i + 1) % n] += del;
}
}
cout << ([&]() {
rep(i, 0, n) if (a[i] != b[i]) return false;
return true;
}() ? "Yes" : "No");
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
384 KB |
Output is correct |
| 4 |
Correct |
1 ms |
384 KB |
Output is correct |
| 5 |
Correct |
1 ms |
384 KB |
Output is correct |
| 6 |
Correct |
0 ms |
384 KB |
Output is correct |
| 7 |
Correct |
1 ms |
384 KB |
Output is correct |
| 8 |
Correct |
1 ms |
384 KB |
Output is correct |
| 9 |
Correct |
0 ms |
384 KB |
Output is correct |
| 10 |
Correct |
0 ms |
384 KB |
Output is correct |
| 11 |
Correct |
0 ms |
384 KB |
Output is correct |
| 12 |
Correct |
0 ms |
384 KB |
Output is correct |
| 13 |
Correct |
0 ms |
384 KB |
Output is correct |
| 14 |
Correct |
0 ms |
384 KB |
Output is correct |
| 15 |
Correct |
2 ms |
384 KB |
Output is correct |
| 16 |
Correct |
1 ms |
384 KB |
Output is correct |
| 17 |
Correct |
0 ms |
384 KB |
Output is correct |
| 18 |
Correct |
0 ms |
384 KB |
Output is correct |
| 19 |
Correct |
0 ms |
384 KB |
Output is correct |
| 20 |
Correct |
1 ms |
384 KB |
Output is correct |
| 21 |
Correct |
1 ms |
384 KB |
Output is correct |
| 22 |
Correct |
0 ms |
384 KB |
Output is correct |
| 23 |
Correct |
1 ms |
384 KB |
Output is correct |
| 24 |
Correct |
1 ms |
384 KB |
Output is correct |
| 25 |
Correct |
0 ms |
384 KB |
Output is correct |
| 26 |
Correct |
0 ms |
384 KB |
Output is correct |
| 27 |
Correct |
1 ms |
384 KB |
Output is correct |
| 28 |
Correct |
0 ms |
384 KB |
Output is correct |
| 29 |
Correct |
1 ms |
384 KB |
Output is correct |
| 30 |
Correct |
1 ms |
384 KB |
Output is correct |
| 31 |
Correct |
0 ms |
384 KB |
Output is correct |
| 32 |
Correct |
1 ms |
384 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
384 KB |
Output is correct |
| 4 |
Correct |
1 ms |
384 KB |
Output is correct |
| 5 |
Correct |
1 ms |
384 KB |
Output is correct |
| 6 |
Correct |
0 ms |
384 KB |
Output is correct |
| 7 |
Correct |
1 ms |
384 KB |
Output is correct |
| 8 |
Correct |
1 ms |
384 KB |
Output is correct |
| 9 |
Correct |
0 ms |
384 KB |
Output is correct |
| 10 |
Correct |
0 ms |
384 KB |
Output is correct |
| 11 |
Correct |
0 ms |
384 KB |
Output is correct |
| 12 |
Correct |
0 ms |
384 KB |
Output is correct |
| 13 |
Correct |
0 ms |
384 KB |
Output is correct |
| 14 |
Correct |
0 ms |
384 KB |
Output is correct |
| 15 |
Correct |
2 ms |
384 KB |
Output is correct |
| 16 |
Correct |
1 ms |
384 KB |
Output is correct |
| 17 |
Correct |
0 ms |
384 KB |
Output is correct |
| 18 |
Correct |
0 ms |
384 KB |
Output is correct |
| 19 |
Correct |
0 ms |
384 KB |
Output is correct |
| 20 |
Correct |
1 ms |
384 KB |
Output is correct |
| 21 |
Correct |
1 ms |
384 KB |
Output is correct |
| 22 |
Correct |
0 ms |
384 KB |
Output is correct |
| 23 |
Correct |
1 ms |
384 KB |
Output is correct |
| 24 |
Correct |
1 ms |
384 KB |
Output is correct |
| 25 |
Correct |
0 ms |
384 KB |
Output is correct |
| 26 |
Correct |
0 ms |
384 KB |
Output is correct |
| 27 |
Correct |
1 ms |
384 KB |
Output is correct |
| 28 |
Correct |
0 ms |
384 KB |
Output is correct |
| 29 |
Correct |
1 ms |
384 KB |
Output is correct |
| 30 |
Correct |
1 ms |
384 KB |
Output is correct |
| 31 |
Correct |
0 ms |
384 KB |
Output is correct |
| 32 |
Correct |
1 ms |
384 KB |
Output is correct |
| 33 |
Correct |
1 ms |
384 KB |
Output is correct |
| 34 |
Correct |
1 ms |
384 KB |
Output is correct |
| 35 |
Correct |
0 ms |
384 KB |
Output is correct |
| 36 |
Correct |
1 ms |
384 KB |
Output is correct |
| 37 |
Correct |
1 ms |
384 KB |
Output is correct |
| 38 |
Correct |
1 ms |
384 KB |
Output is correct |
| 39 |
Correct |
1 ms |
384 KB |
Output is correct |
| 40 |
Correct |
1 ms |
384 KB |
Output is correct |
| 41 |
Correct |
1 ms |
384 KB |
Output is correct |
| 42 |
Correct |
1 ms |
384 KB |
Output is correct |
| 43 |
Correct |
1 ms |
384 KB |
Output is correct |
| 44 |
Correct |
1 ms |
384 KB |
Output is correct |
| 45 |
Correct |
1 ms |
384 KB |
Output is correct |
| 46 |
Correct |
1 ms |
384 KB |
Output is correct |
| 47 |
Correct |
1 ms |
384 KB |
Output is correct |
| 48 |
Correct |
1 ms |
384 KB |
Output is correct |
| 49 |
Correct |
1 ms |
384 KB |
Output is correct |
| 50 |
Correct |
1 ms |
384 KB |
Output is correct |
| 51 |
Correct |
1 ms |
384 KB |
Output is correct |
| 52 |
Correct |
1 ms |
384 KB |
Output is correct |
| 53 |
Correct |
1 ms |
384 KB |
Output is correct |
| 54 |
Correct |
1 ms |
384 KB |
Output is correct |
| 55 |
Correct |
1 ms |
384 KB |
Output is correct |
| 56 |
Correct |
0 ms |
384 KB |
Output is correct |
| 57 |
Correct |
1 ms |
384 KB |
Output is correct |
| 58 |
Correct |
1 ms |
384 KB |
Output is correct |
| 59 |
Correct |
1 ms |
384 KB |
Output is correct |
| 60 |
Correct |
1 ms |
384 KB |
Output is correct |
| 61 |
Correct |
1 ms |
384 KB |
Output is correct |
| 62 |
Correct |
1 ms |
384 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
384 KB |
Output is correct |
| 2 |
Correct |
0 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
384 KB |
Output is correct |
| 4 |
Correct |
1 ms |
384 KB |
Output is correct |
| 5 |
Correct |
1 ms |
384 KB |
Output is correct |
| 6 |
Correct |
0 ms |
384 KB |
Output is correct |
| 7 |
Correct |
1 ms |
384 KB |
Output is correct |
| 8 |
Correct |
1 ms |
384 KB |
Output is correct |
| 9 |
Correct |
0 ms |
384 KB |
Output is correct |
| 10 |
Correct |
0 ms |
384 KB |
Output is correct |
| 11 |
Correct |
0 ms |
384 KB |
Output is correct |
| 12 |
Correct |
0 ms |
384 KB |
Output is correct |
| 13 |
Correct |
0 ms |
384 KB |
Output is correct |
| 14 |
Correct |
0 ms |
384 KB |
Output is correct |
| 15 |
Correct |
2 ms |
384 KB |
Output is correct |
| 16 |
Correct |
1 ms |
384 KB |
Output is correct |
| 17 |
Correct |
0 ms |
384 KB |
Output is correct |
| 18 |
Correct |
0 ms |
384 KB |
Output is correct |
| 19 |
Correct |
0 ms |
384 KB |
Output is correct |
| 20 |
Correct |
1 ms |
384 KB |
Output is correct |
| 21 |
Correct |
1 ms |
384 KB |
Output is correct |
| 22 |
Correct |
0 ms |
384 KB |
Output is correct |
| 23 |
Correct |
1 ms |
384 KB |
Output is correct |
| 24 |
Correct |
1 ms |
384 KB |
Output is correct |
| 25 |
Correct |
0 ms |
384 KB |
Output is correct |
| 26 |
Correct |
0 ms |
384 KB |
Output is correct |
| 27 |
Correct |
1 ms |
384 KB |
Output is correct |
| 28 |
Correct |
0 ms |
384 KB |
Output is correct |
| 29 |
Correct |
1 ms |
384 KB |
Output is correct |
| 30 |
Correct |
1 ms |
384 KB |
Output is correct |
| 31 |
Correct |
0 ms |
384 KB |
Output is correct |
| 32 |
Correct |
1 ms |
384 KB |
Output is correct |
| 33 |
Correct |
1 ms |
384 KB |
Output is correct |
| 34 |
Correct |
1 ms |
384 KB |
Output is correct |
| 35 |
Correct |
0 ms |
384 KB |
Output is correct |
| 36 |
Correct |
1 ms |
384 KB |
Output is correct |
| 37 |
Correct |
1 ms |
384 KB |
Output is correct |
| 38 |
Correct |
1 ms |
384 KB |
Output is correct |
| 39 |
Correct |
1 ms |
384 KB |
Output is correct |
| 40 |
Correct |
1 ms |
384 KB |
Output is correct |
| 41 |
Correct |
1 ms |
384 KB |
Output is correct |
| 42 |
Correct |
1 ms |
384 KB |
Output is correct |
| 43 |
Correct |
1 ms |
384 KB |
Output is correct |
| 44 |
Correct |
1 ms |
384 KB |
Output is correct |
| 45 |
Correct |
1 ms |
384 KB |
Output is correct |
| 46 |
Correct |
1 ms |
384 KB |
Output is correct |
| 47 |
Correct |
1 ms |
384 KB |
Output is correct |
| 48 |
Correct |
1 ms |
384 KB |
Output is correct |
| 49 |
Correct |
1 ms |
384 KB |
Output is correct |
| 50 |
Correct |
1 ms |
384 KB |
Output is correct |
| 51 |
Correct |
1 ms |
384 KB |
Output is correct |
| 52 |
Correct |
1 ms |
384 KB |
Output is correct |
| 53 |
Correct |
1 ms |
384 KB |
Output is correct |
| 54 |
Correct |
1 ms |
384 KB |
Output is correct |
| 55 |
Correct |
1 ms |
384 KB |
Output is correct |
| 56 |
Correct |
0 ms |
384 KB |
Output is correct |
| 57 |
Correct |
1 ms |
384 KB |
Output is correct |
| 58 |
Correct |
1 ms |
384 KB |
Output is correct |
| 59 |
Correct |
1 ms |
384 KB |
Output is correct |
| 60 |
Correct |
1 ms |
384 KB |
Output is correct |
| 61 |
Correct |
1 ms |
384 KB |
Output is correct |
| 62 |
Correct |
1 ms |
384 KB |
Output is correct |
| 63 |
Correct |
286 ms |
27384 KB |
Output is correct |
| 64 |
Correct |
153 ms |
12080 KB |
Output is correct |
| 65 |
Correct |
266 ms |
27128 KB |
Output is correct |
| 66 |
Correct |
158 ms |
12152 KB |
Output is correct |
| 67 |
Correct |
154 ms |
13548 KB |
Output is correct |
| 68 |
Correct |
167 ms |
15856 KB |
Output is correct |
| 69 |
Correct |
252 ms |
27632 KB |
Output is correct |
| 70 |
Correct |
158 ms |
12028 KB |
Output is correct |
| 71 |
Correct |
159 ms |
13576 KB |
Output is correct |
| 72 |
Correct |
176 ms |
15864 KB |
Output is correct |
| 73 |
Correct |
259 ms |
27512 KB |
Output is correct |
| 74 |
Correct |
145 ms |
12024 KB |
Output is correct |
| 75 |
Correct |
156 ms |
13432 KB |
Output is correct |
| 76 |
Correct |
187 ms |
15864 KB |
Output is correct |
| 77 |
Correct |
245 ms |
27516 KB |
Output is correct |
| 78 |
Correct |
184 ms |
19864 KB |
Output is correct |
| 79 |
Correct |
185 ms |
19832 KB |
Output is correct |
| 80 |
Correct |
198 ms |
19960 KB |
Output is correct |
| 81 |
Correct |
206 ms |
19768 KB |
Output is correct |
| 82 |
Correct |
128 ms |
12024 KB |
Output is correct |
| 83 |
Correct |
131 ms |
12124 KB |
Output is correct |
| 84 |
Correct |
151 ms |
12024 KB |
Output is correct |
| 85 |
Correct |
283 ms |
28752 KB |
Output is correct |
| 86 |
Correct |
267 ms |
28648 KB |
Output is correct |
| 87 |
Correct |
241 ms |
20880 KB |
Output is correct |
| 88 |
Correct |
217 ms |
21112 KB |
Output is correct |
