#include<bits/stdc++.h>
using namespace std;
int main(){
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n;
cin>>n;
vector<pair<long long,int>>all(n);
for(int i=0;i<n;i++){
cin>>all[i].first>>all[i].second;
}
int cnt=0;
int j=0;
while(cnt<n*3){
if(all[j].first<=all[j].second){
j++;
cnt++;
j%=n;
continue;
}
if(all[j].first==1&&all[j].second==0){
j++;
cnt++;
j%=n;
continue;
}
cnt=0;
int fj=j;
while(all[fj].first>all[fj].second){
if(all[fj].second==0&&all[fj].first==1){
break;
}
if(all[fj].second==0){
long long fc=(all[fj].first-all[fj].second)/2;
all[fj].first-=fc*2;
all[(fj+1)%n].first+=fc;
fj++;
fj%=n;
continue;
}
long long fc=(all[fj].first-all[fj].second+1)/2;
all[fj].first-=fc*2;
all[(fj+1)%n].first+=fc;
fj++;
fj%=n;
}
j++;
j%=n;
}
int f=1;
for(int i=0;i<n;i++){
if(all[i].first!=all[i].second){
f=0;
}
}
if(f){
cout<<"Yes\n";
}
else{
cout<<"No\n";
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
316 KB |
Output is correct |
| 3 |
Correct |
1 ms |
320 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
320 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
320 KB |
Output is correct |
| 14 |
Correct |
0 ms |
212 KB |
Output is correct |
| 15 |
Correct |
1 ms |
312 KB |
Output is correct |
| 16 |
Correct |
0 ms |
212 KB |
Output is correct |
| 17 |
Correct |
0 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
212 KB |
Output is correct |
| 20 |
Correct |
1 ms |
212 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
1 ms |
212 KB |
Output is correct |
| 23 |
Correct |
1 ms |
212 KB |
Output is correct |
| 24 |
Correct |
1 ms |
316 KB |
Output is correct |
| 25 |
Correct |
1 ms |
212 KB |
Output is correct |
| 26 |
Correct |
1 ms |
212 KB |
Output is correct |
| 27 |
Correct |
1 ms |
212 KB |
Output is correct |
| 28 |
Correct |
1 ms |
324 KB |
Output is correct |
| 29 |
Correct |
1 ms |
320 KB |
Output is correct |
| 30 |
Correct |
1 ms |
212 KB |
Output is correct |
| 31 |
Correct |
0 ms |
320 KB |
Output is correct |
| 32 |
Correct |
1 ms |
320 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
316 KB |
Output is correct |
| 3 |
Correct |
1 ms |
320 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
320 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
320 KB |
Output is correct |
| 14 |
Correct |
0 ms |
212 KB |
Output is correct |
| 15 |
Correct |
1 ms |
312 KB |
Output is correct |
| 16 |
Correct |
0 ms |
212 KB |
Output is correct |
| 17 |
Correct |
0 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
212 KB |
Output is correct |
| 20 |
Correct |
1 ms |
212 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
1 ms |
212 KB |
Output is correct |
| 23 |
Correct |
1 ms |
212 KB |
Output is correct |
| 24 |
Correct |
1 ms |
316 KB |
Output is correct |
| 25 |
Correct |
1 ms |
212 KB |
Output is correct |
| 26 |
Correct |
1 ms |
212 KB |
Output is correct |
| 27 |
Correct |
1 ms |
212 KB |
Output is correct |
| 28 |
Correct |
1 ms |
324 KB |
Output is correct |
| 29 |
Correct |
1 ms |
320 KB |
Output is correct |
| 30 |
Correct |
1 ms |
212 KB |
Output is correct |
| 31 |
Correct |
0 ms |
320 KB |
Output is correct |
| 32 |
Correct |
1 ms |
320 KB |
Output is correct |
| 33 |
Correct |
1 ms |
212 KB |
Output is correct |
| 34 |
Correct |
0 ms |
212 KB |
Output is correct |
| 35 |
Correct |
1 ms |
212 KB |
Output is correct |
| 36 |
Correct |
1 ms |
316 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 |
212 KB |
Output is correct |
| 40 |
Correct |
1 ms |
212 KB |
Output is correct |
| 41 |
Correct |
1 ms |
212 KB |
Output is correct |
| 42 |
Correct |
1 ms |
212 KB |
Output is correct |
| 43 |
Correct |
1 ms |
316 KB |
Output is correct |
| 44 |
Correct |
1 ms |
212 KB |
Output is correct |
| 45 |
Correct |
1 ms |
212 KB |
Output is correct |
| 46 |
Correct |
1 ms |
212 KB |
Output is correct |
| 47 |
Correct |
1 ms |
212 KB |
Output is correct |
| 48 |
Correct |
1 ms |
312 KB |
Output is correct |
| 49 |
Correct |
1 ms |
212 KB |
Output is correct |
| 50 |
Correct |
1 ms |
212 KB |
Output is correct |
| 51 |
Correct |
1 ms |
320 KB |
Output is correct |
| 52 |
Correct |
1 ms |
212 KB |
Output is correct |
| 53 |
Correct |
1 ms |
212 KB |
Output is correct |
| 54 |
Correct |
1 ms |
212 KB |
Output is correct |
| 55 |
Correct |
1 ms |
324 KB |
Output is correct |
| 56 |
Correct |
1 ms |
320 KB |
Output is correct |
| 57 |
Correct |
1 ms |
212 KB |
Output is correct |
| 58 |
Correct |
1 ms |
212 KB |
Output is correct |
| 59 |
Correct |
1 ms |
212 KB |
Output is correct |
| 60 |
Correct |
1 ms |
212 KB |
Output is correct |
| 61 |
Correct |
1 ms |
212 KB |
Output is correct |
| 62 |
Correct |
1 ms |
212 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
316 KB |
Output is correct |
| 3 |
Correct |
1 ms |
320 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
320 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
0 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
320 KB |
Output is correct |
| 14 |
Correct |
0 ms |
212 KB |
Output is correct |
| 15 |
Correct |
1 ms |
312 KB |
Output is correct |
| 16 |
Correct |
0 ms |
212 KB |
Output is correct |
| 17 |
Correct |
0 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
212 KB |
Output is correct |
| 20 |
Correct |
1 ms |
212 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
1 ms |
212 KB |
Output is correct |
| 23 |
Correct |
1 ms |
212 KB |
Output is correct |
| 24 |
Correct |
1 ms |
316 KB |
Output is correct |
| 25 |
Correct |
1 ms |
212 KB |
Output is correct |
| 26 |
Correct |
1 ms |
212 KB |
Output is correct |
| 27 |
Correct |
1 ms |
212 KB |
Output is correct |
| 28 |
Correct |
1 ms |
324 KB |
Output is correct |
| 29 |
Correct |
1 ms |
320 KB |
Output is correct |
| 30 |
Correct |
1 ms |
212 KB |
Output is correct |
| 31 |
Correct |
0 ms |
320 KB |
Output is correct |
| 32 |
Correct |
1 ms |
320 KB |
Output is correct |
| 33 |
Correct |
1 ms |
212 KB |
Output is correct |
| 34 |
Correct |
0 ms |
212 KB |
Output is correct |
| 35 |
Correct |
1 ms |
212 KB |
Output is correct |
| 36 |
Correct |
1 ms |
316 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 |
212 KB |
Output is correct |
| 40 |
Correct |
1 ms |
212 KB |
Output is correct |
| 41 |
Correct |
1 ms |
212 KB |
Output is correct |
| 42 |
Correct |
1 ms |
212 KB |
Output is correct |
| 43 |
Correct |
1 ms |
316 KB |
Output is correct |
| 44 |
Correct |
1 ms |
212 KB |
Output is correct |
| 45 |
Correct |
1 ms |
212 KB |
Output is correct |
| 46 |
Correct |
1 ms |
212 KB |
Output is correct |
| 47 |
Correct |
1 ms |
212 KB |
Output is correct |
| 48 |
Correct |
1 ms |
312 KB |
Output is correct |
| 49 |
Correct |
1 ms |
212 KB |
Output is correct |
| 50 |
Correct |
1 ms |
212 KB |
Output is correct |
| 51 |
Correct |
1 ms |
320 KB |
Output is correct |
| 52 |
Correct |
1 ms |
212 KB |
Output is correct |
| 53 |
Correct |
1 ms |
212 KB |
Output is correct |
| 54 |
Correct |
1 ms |
212 KB |
Output is correct |
| 55 |
Correct |
1 ms |
324 KB |
Output is correct |
| 56 |
Correct |
1 ms |
320 KB |
Output is correct |
| 57 |
Correct |
1 ms |
212 KB |
Output is correct |
| 58 |
Correct |
1 ms |
212 KB |
Output is correct |
| 59 |
Correct |
1 ms |
212 KB |
Output is correct |
| 60 |
Correct |
1 ms |
212 KB |
Output is correct |
| 61 |
Correct |
1 ms |
212 KB |
Output is correct |
| 62 |
Correct |
1 ms |
212 KB |
Output is correct |
| 63 |
Correct |
274 ms |
35416 KB |
Output is correct |
| 64 |
Correct |
156 ms |
19804 KB |
Output is correct |
| 65 |
Correct |
299 ms |
34800 KB |
Output is correct |
| 66 |
Correct |
133 ms |
19816 KB |
Output is correct |
| 67 |
Correct |
140 ms |
21224 KB |
Output is correct |
| 68 |
Correct |
158 ms |
23528 KB |
Output is correct |
| 69 |
Correct |
242 ms |
35316 KB |
Output is correct |
| 70 |
Correct |
130 ms |
19808 KB |
Output is correct |
| 71 |
Correct |
148 ms |
21212 KB |
Output is correct |
| 72 |
Correct |
162 ms |
23528 KB |
Output is correct |
| 73 |
Correct |
229 ms |
35324 KB |
Output is correct |
| 74 |
Correct |
136 ms |
19796 KB |
Output is correct |
| 75 |
Correct |
154 ms |
21204 KB |
Output is correct |
| 76 |
Correct |
156 ms |
23516 KB |
Output is correct |
| 77 |
Correct |
232 ms |
35292 KB |
Output is correct |
| 78 |
Correct |
195 ms |
27488 KB |
Output is correct |
| 79 |
Correct |
192 ms |
27492 KB |
Output is correct |
| 80 |
Correct |
169 ms |
27508 KB |
Output is correct |
| 81 |
Correct |
181 ms |
27492 KB |
Output is correct |
| 82 |
Correct |
121 ms |
19812 KB |
Output is correct |
| 83 |
Correct |
120 ms |
19804 KB |
Output is correct |
| 84 |
Correct |
126 ms |
19852 KB |
Output is correct |
| 85 |
Correct |
257 ms |
36304 KB |
Output is correct |
| 86 |
Correct |
254 ms |
36324 KB |
Output is correct |
| 87 |
Correct |
198 ms |
28640 KB |
Output is correct |
| 88 |
Correct |
232 ms |
28632 KB |
Output is correct |
