// 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]){
int j = (i + 1) % n;
ll w = (a[i] - b[i]) / 2 + ((a[i] - b[i]) % 2);
if(2 * w > a[i])
continue;
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 |
212 KB |
Output is correct |
| 3 |
Correct |
0 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 |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
0 ms |
212 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 |
340 KB |
Output is correct |
| 17 |
Correct |
0 ms |
212 KB |
Output is correct |
| 18 |
Correct |
0 ms |
212 KB |
Output is correct |
| 19 |
Correct |
0 ms |
212 KB |
Output is correct |
| 20 |
Correct |
0 ms |
212 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
0 ms |
340 KB |
Output is correct |
| 23 |
Correct |
1 ms |
340 KB |
Output is correct |
| 24 |
Correct |
0 ms |
340 KB |
Output is correct |
| 25 |
Correct |
0 ms |
212 KB |
Output is correct |
| 26 |
Correct |
0 ms |
340 KB |
Output is correct |
| 27 |
Correct |
1 ms |
212 KB |
Output is correct |
| 28 |
Correct |
0 ms |
212 KB |
Output is correct |
| 29 |
Correct |
0 ms |
340 KB |
Output is correct |
| 30 |
Correct |
0 ms |
340 KB |
Output is correct |
| 31 |
Correct |
1 ms |
332 KB |
Output is correct |
| 32 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 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 |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
0 ms |
212 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 |
340 KB |
Output is correct |
| 17 |
Correct |
0 ms |
212 KB |
Output is correct |
| 18 |
Correct |
0 ms |
212 KB |
Output is correct |
| 19 |
Correct |
0 ms |
212 KB |
Output is correct |
| 20 |
Correct |
0 ms |
212 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
0 ms |
340 KB |
Output is correct |
| 23 |
Correct |
1 ms |
340 KB |
Output is correct |
| 24 |
Correct |
0 ms |
340 KB |
Output is correct |
| 25 |
Correct |
0 ms |
212 KB |
Output is correct |
| 26 |
Correct |
0 ms |
340 KB |
Output is correct |
| 27 |
Correct |
1 ms |
212 KB |
Output is correct |
| 28 |
Correct |
0 ms |
212 KB |
Output is correct |
| 29 |
Correct |
0 ms |
340 KB |
Output is correct |
| 30 |
Correct |
0 ms |
340 KB |
Output is correct |
| 31 |
Correct |
1 ms |
332 KB |
Output is correct |
| 32 |
Correct |
1 ms |
340 KB |
Output is correct |
| 33 |
Correct |
0 ms |
212 KB |
Output is correct |
| 34 |
Correct |
1 ms |
340 KB |
Output is correct |
| 35 |
Correct |
0 ms |
212 KB |
Output is correct |
| 36 |
Correct |
1 ms |
212 KB |
Output is correct |
| 37 |
Correct |
0 ms |
212 KB |
Output is correct |
| 38 |
Correct |
0 ms |
212 KB |
Output is correct |
| 39 |
Correct |
1 ms |
340 KB |
Output is correct |
| 40 |
Correct |
0 ms |
340 KB |
Output is correct |
| 41 |
Correct |
1 ms |
340 KB |
Output is correct |
| 42 |
Correct |
0 ms |
212 KB |
Output is correct |
| 43 |
Correct |
0 ms |
212 KB |
Output is correct |
| 44 |
Correct |
0 ms |
340 KB |
Output is correct |
| 45 |
Correct |
0 ms |
340 KB |
Output is correct |
| 46 |
Correct |
1 ms |
340 KB |
Output is correct |
| 47 |
Correct |
0 ms |
212 KB |
Output is correct |
| 48 |
Correct |
0 ms |
340 KB |
Output is correct |
| 49 |
Correct |
0 ms |
332 KB |
Output is correct |
| 50 |
Correct |
0 ms |
212 KB |
Output is correct |
| 51 |
Correct |
0 ms |
340 KB |
Output is correct |
| 52 |
Correct |
0 ms |
212 KB |
Output is correct |
| 53 |
Correct |
0 ms |
340 KB |
Output is correct |
| 54 |
Correct |
1 ms |
340 KB |
Output is correct |
| 55 |
Correct |
0 ms |
340 KB |
Output is correct |
| 56 |
Correct |
0 ms |
212 KB |
Output is correct |
| 57 |
Correct |
0 ms |
340 KB |
Output is correct |
| 58 |
Correct |
1 ms |
340 KB |
Output is correct |
| 59 |
Correct |
0 ms |
340 KB |
Output is correct |
| 60 |
Correct |
0 ms |
212 KB |
Output is correct |
| 61 |
Correct |
1 ms |
336 KB |
Output is correct |
| 62 |
Correct |
0 ms |
340 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 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 |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
0 ms |
212 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 |
340 KB |
Output is correct |
| 17 |
Correct |
0 ms |
212 KB |
Output is correct |
| 18 |
Correct |
0 ms |
212 KB |
Output is correct |
| 19 |
Correct |
0 ms |
212 KB |
Output is correct |
| 20 |
Correct |
0 ms |
212 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
0 ms |
340 KB |
Output is correct |
| 23 |
Correct |
1 ms |
340 KB |
Output is correct |
| 24 |
Correct |
0 ms |
340 KB |
Output is correct |
| 25 |
Correct |
0 ms |
212 KB |
Output is correct |
| 26 |
Correct |
0 ms |
340 KB |
Output is correct |
| 27 |
Correct |
1 ms |
212 KB |
Output is correct |
| 28 |
Correct |
0 ms |
212 KB |
Output is correct |
| 29 |
Correct |
0 ms |
340 KB |
Output is correct |
| 30 |
Correct |
0 ms |
340 KB |
Output is correct |
| 31 |
Correct |
1 ms |
332 KB |
Output is correct |
| 32 |
Correct |
1 ms |
340 KB |
Output is correct |
| 33 |
Correct |
0 ms |
212 KB |
Output is correct |
| 34 |
Correct |
1 ms |
340 KB |
Output is correct |
| 35 |
Correct |
0 ms |
212 KB |
Output is correct |
| 36 |
Correct |
1 ms |
212 KB |
Output is correct |
| 37 |
Correct |
0 ms |
212 KB |
Output is correct |
| 38 |
Correct |
0 ms |
212 KB |
Output is correct |
| 39 |
Correct |
1 ms |
340 KB |
Output is correct |
| 40 |
Correct |
0 ms |
340 KB |
Output is correct |
| 41 |
Correct |
1 ms |
340 KB |
Output is correct |
| 42 |
Correct |
0 ms |
212 KB |
Output is correct |
| 43 |
Correct |
0 ms |
212 KB |
Output is correct |
| 44 |
Correct |
0 ms |
340 KB |
Output is correct |
| 45 |
Correct |
0 ms |
340 KB |
Output is correct |
| 46 |
Correct |
1 ms |
340 KB |
Output is correct |
| 47 |
Correct |
0 ms |
212 KB |
Output is correct |
| 48 |
Correct |
0 ms |
340 KB |
Output is correct |
| 49 |
Correct |
0 ms |
332 KB |
Output is correct |
| 50 |
Correct |
0 ms |
212 KB |
Output is correct |
| 51 |
Correct |
0 ms |
340 KB |
Output is correct |
| 52 |
Correct |
0 ms |
212 KB |
Output is correct |
| 53 |
Correct |
0 ms |
340 KB |
Output is correct |
| 54 |
Correct |
1 ms |
340 KB |
Output is correct |
| 55 |
Correct |
0 ms |
340 KB |
Output is correct |
| 56 |
Correct |
0 ms |
212 KB |
Output is correct |
| 57 |
Correct |
0 ms |
340 KB |
Output is correct |
| 58 |
Correct |
1 ms |
340 KB |
Output is correct |
| 59 |
Correct |
0 ms |
340 KB |
Output is correct |
| 60 |
Correct |
0 ms |
212 KB |
Output is correct |
| 61 |
Correct |
1 ms |
336 KB |
Output is correct |
| 62 |
Correct |
0 ms |
340 KB |
Output is correct |
| 63 |
Correct |
166 ms |
15888 KB |
Output is correct |
| 64 |
Correct |
96 ms |
16216 KB |
Output is correct |
| 65 |
Correct |
161 ms |
15980 KB |
Output is correct |
| 66 |
Correct |
96 ms |
16160 KB |
Output is correct |
| 67 |
Correct |
96 ms |
16140 KB |
Output is correct |
| 68 |
Correct |
102 ms |
16220 KB |
Output is correct |
| 69 |
Correct |
155 ms |
15876 KB |
Output is correct |
| 70 |
Correct |
93 ms |
16204 KB |
Output is correct |
| 71 |
Correct |
95 ms |
16192 KB |
Output is correct |
| 72 |
Correct |
107 ms |
16184 KB |
Output is correct |
| 73 |
Correct |
164 ms |
15900 KB |
Output is correct |
| 74 |
Correct |
90 ms |
16220 KB |
Output is correct |
| 75 |
Correct |
102 ms |
16160 KB |
Output is correct |
| 76 |
Correct |
102 ms |
16152 KB |
Output is correct |
| 77 |
Correct |
157 ms |
15868 KB |
Output is correct |
| 78 |
Correct |
128 ms |
16224 KB |
Output is correct |
| 79 |
Correct |
124 ms |
16280 KB |
Output is correct |
| 80 |
Correct |
124 ms |
16176 KB |
Output is correct |
| 81 |
Correct |
125 ms |
16224 KB |
Output is correct |
| 82 |
Correct |
78 ms |
16204 KB |
Output is correct |
| 83 |
Correct |
77 ms |
16192 KB |
Output is correct |
| 84 |
Correct |
73 ms |
16280 KB |
Output is correct |
| 85 |
Correct |
161 ms |
15976 KB |
Output is correct |
| 86 |
Correct |
164 ms |
15860 KB |
Output is correct |
| 87 |
Correct |
127 ms |
16148 KB |
Output is correct |
| 88 |
Correct |
130 ms |
16272 KB |
Output is correct |
