This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#pragma optimize("Ofast,unroll-loops")
#pragma target("avx2")
using namespace std;
#define ll long long
#define ld long double
#define pb push_back
#define pf push_front
#define pii pair<int,int>
#define all(v) v.begin(),v.end()
#define F first
#define S second
#define mem(a,i) memset(a,i,sizeof(a))
#define sz(s) (int)s.size()
#define y1 yy
#define ppb pop_back
#define lb lower_bound
#define ub upper_bound
#define gcd(a,b) __gcd(a,b)
#define in insert
#define int ll
const int MAX=2e5+10;
const int B=500;
const int maxB=1000;
const int N=104;
const int block=450;
const int inf=2e9;
const int mod=1e9+7;
const int mod1=1e9+9;
const ld eps=1e-9;
int dx[8]={1,0,-1,0,1,-1,-1,1};
int dy[8]={0,1,0,-1,1,-1,1,-1};
int binpow(int a,int n){
if(!n)return 1;
if(n%2==1)return a*binpow(a,n-1)%mod;
int k=binpow(a,n/2);
return k*k%mod;
}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int n;
int a[MAX],b[MAX];
int r(int i){
return i%n+1;
}
int bit(int i,int j){
return (i>>j)&1;
}
int p[MAX],c[MAX];
bool ok=0;
bool check(){
int na[10];
for(int i=1;i<=n;i++)na[i]=a[i];
for(int i=1;i<=n;i++){
if(p[i]==1){
na[i]-=2*c[i];
na[r(i)]+=c[i];
}
else if(p[i]==2){
na[i]-=4*c[i];
na[r(r(i))]+=c[i];
}
}
for(int i=1;i<=n;i++){
if(na[i]!=b[i])return 0;
}
return 1;
}
void calc(int i){
if(i==n+1){
ok|=check();
return;
}
p[i]=0;
c[i]=0;
calc(i+1);
p[i]=1;
c[i]=0;
for(c[i]=1;c[i]<=8;c[i]++){
calc(i+1);
}
p[i]=2;
c[i]=0;
for(c[i]=1;c[i]<=2;c[i]++){
calc(i+1);
}
}
void solve(){
cin>>n;
for(int i=1;i<=n;i++)cin>>a[i]>>b[i];
calc(1);
if(ok){
cout<<"Yes\n";
return;
}
cout<<"No\n";
}
signed main(){
// freopen("triangles.in","r",stdin);
// freopen("triangles.out","w",stdout);
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
// prec();
int t=1;
// cin>>t;
while(t--){
solve();
}
}
Compilation message (stderr)
remittance.cpp:3: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
3 | #pragma optimize("Ofast,unroll-loops")
|
remittance.cpp:4: warning: ignoring '#pragma target ' [-Wunknown-pragmas]
4 | #pragma target("avx2")
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