#include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define ll long long
#define ldb long double
#define db double
#define fin(x) freopen(x,"r",stdin)
#define fout(x) freopen(x,"w",stdout)
#define fo(i,l,r) for(int i=(l);i<=(r);i++)
#define foi(i,l,r) for(int i=(l);i>=(r);i--)
#define el cout<<'\n';
#define cel cerr<<'\n';
#define all(x) x.begin(),x.end()
#define ii pair<int,int>
#define iii pair<int,ii>
#define gb(x,i) (((x)>>(i))&1)
#define mask(i) (1LL<<(i))
#define TIME (1.0 * clock()/CLOCKS_PER_SEC)
using namespace std;
const int N=1e6+5;
const int bl=60;
const ll base=1e9+7;
const ll inf=1e9;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
ll Rand(ll l,ll r)
{
return l+(1ll*rng()*rng()%(r-l+1)+(r-l+1))%(r-l+1);
}
template<class X,class Y>bool maximize(X &a,Y b)
{
if(a<b) return a=b,true;
return false;
}
template<class X,class Y>bool minimize(X &a, Y b)
{
if(a>b) return a=b,true;
return false;
}
void add(auto &a,auto b)
{
a+=b;
if(a>=base) a-=base;
if(a<0) a+=base;
}
int n,a[N],b[N];
int main()
{
#define task "o"
if(fopen(task".inp","r"))
{
fin(task".inp");
//fout(task".out");
}
srand(time(NULL));
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
cin>>n;
fo(i,1,n) cin>>a[i]>>b[i];
fo(i,1,n) if(a[i]>b[i]+1)
{
int now=a[i]-b[i];
if(now%2==0) a[i]=b[i];
else a[i]=b[i]+1,now--;
fo(j,i+1,n)
{
a[j]+=now/2,now=0;
if(a[j]>b[j])
{
now=a[j]-b[j];
if(now%2==0) a[j]=b[j];
else a[j]=b[j]+1,now--;
}
if(now==0) break;
}
fo(j,1,i-1)
{
a[j]+=now/2,now=0;
if(a[j]>b[j])
{
now=a[j]-b[j];
if(now%2==0) a[j]=b[j];
else a[j]=b[j]+1,now--;
}
if(now==0) break;
}
if(now!=0) return cout<<"No",0;
}
fo(i,1,n) if(a[i]!=b[i]) return cout<<"No",0;
cout<<"Yes",el
cerr<<"Time elapsed: "<<TIME<<" s.\n";
}
Compilation message
remittance.cpp:41:10: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
41 | void add(auto &a,auto b)
| ^~~~
remittance.cpp:41:18: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
41 | void add(auto &a,auto b)
| ^~~~
remittance.cpp: In function 'int main()':
remittance.cpp:9:23: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
9 | #define fin(x) freopen(x,"r",stdin)
| ~~~~~~~^~~~~~~~~~~~~
remittance.cpp:53:9: note: in expansion of macro 'fin'
53 | fin(task".inp");
| ^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
472 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
1 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
348 KB |
Output is correct |
| 7 |
Correct |
1 ms |
348 KB |
Output is correct |
| 8 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 9 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
472 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
1 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
348 KB |
Output is correct |
| 7 |
Correct |
1 ms |
348 KB |
Output is correct |
| 8 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 9 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
472 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
1 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
348 KB |
Output is correct |
| 7 |
Correct |
1 ms |
348 KB |
Output is correct |
| 8 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 9 |
Halted |
0 ms |
0 KB |
- |
