#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int MX=1e6+5;
int N;
ll A[MX], B[MX];
int main() {
cin.tie(0); ios_base::sync_with_stdio(0);
cin>>N;
for(int i=0;i<N;i++) cin>>A[i]>>B[i];
for(int k=0;k<51;k++) {
for(int i=N-1;i>=0;i--) {
if(B[i]>A[i]) {
ll d=B[i]-A[i];
if(i==0) {
B[N-1]+=2*d;
} else {
B[i-1]+=2*d;
}
B[i]=A[i];
}
}
}
bool ok=1;
for(int i=0;i<N;i++)
ok&=A[i]==B[i];
cout<<(ok?"Yes":"No")<<'\n';
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2392 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Correct |
1 ms |
2460 KB |
Output is correct |
4 |
Correct |
1 ms |
2396 KB |
Output is correct |
5 |
Correct |
1 ms |
2396 KB |
Output is correct |
6 |
Correct |
1 ms |
2648 KB |
Output is correct |
7 |
Correct |
1 ms |
2396 KB |
Output is correct |
8 |
Incorrect |
1 ms |
2392 KB |
Output isn't correct |
9 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2392 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Correct |
1 ms |
2460 KB |
Output is correct |
4 |
Correct |
1 ms |
2396 KB |
Output is correct |
5 |
Correct |
1 ms |
2396 KB |
Output is correct |
6 |
Correct |
1 ms |
2648 KB |
Output is correct |
7 |
Correct |
1 ms |
2396 KB |
Output is correct |
8 |
Incorrect |
1 ms |
2392 KB |
Output isn't correct |
9 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2392 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Correct |
1 ms |
2460 KB |
Output is correct |
4 |
Correct |
1 ms |
2396 KB |
Output is correct |
5 |
Correct |
1 ms |
2396 KB |
Output is correct |
6 |
Correct |
1 ms |
2648 KB |
Output is correct |
7 |
Correct |
1 ms |
2396 KB |
Output is correct |
8 |
Incorrect |
1 ms |
2392 KB |
Output isn't correct |
9 |
Halted |
0 ms |
0 KB |
- |