#include <bits/stdc++.h>
#define Loop(x,l,r) for (ll x = (l); x < (ll)(r); ++x)
#define LoopR(x,l,r) for (ll x = (r)-1; x >= (ll)(l); --x)
typedef long long ll;
typedef std::pair<int, int> pii;
typedef std::pair<ll , ll > pll;
using namespace std;
const int N = 1'000'010;
int a[N], b[N];
int n;
bool mv()
{
bool change = 0;
Loop (i,0,n) {
int x = a[i] - b[i];
if (x <= 0)
continue;
change = 1;
x += x&1;
a[i] -= x;
a[i+1] += x/2;
}
a[0] += a[n];
a[n] = 0;
return change;
}
bool check()
{
Loop (i,0,n)
if (a[i] != b[i])
return 0;
return 1;
}
int main()
{
cin.tie(0) -> sync_with_stdio(false);
cin >> n;
Loop (i,0,n)
cin >> a[i] >> b[i];
while (mv());
cout << (check()? "YES": "NO") << '\n';
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |