結果

問題 No.2651 [Cherry 6th Tune B] C\mathbb{C}omplex комбинат
ユーザー 👑 potato167
提出日時 2024-02-23 22:56:43
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 228 ms / 2,500 ms
コード長 3,404 bytes
コンパイル時間 2,172 ms
コンパイル使用メモリ 200,260 KB
最終ジャッジ日時 2025-02-19 20:27:13
ジャッジサーバーID
（参考情報） 		judge3 / judge2
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ファイルパターン 結果
other AC * 39
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ソースコード

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プレゼンテーションモードにする

#include <bits/stdc++.h>
#pragma GCC optimize("unroll-loops")
using namespace std;
using std::cout;
using std::cin;
using std::endl;
using ll=long long;
using ld=long double;
const ll ILL=2167167167167167167;
const int INF=2100000000;
const int mod=998244353;
#define rep(i,a,b) for (int i=(int)(a);i<(int)(b);i++)
#define all(p) p.begin(),p.end()
template<class T> using _pq = priority_queue<T, vector<T>, greater<T>>;
template<class T> ll LB(vector<T> &v,T a){return lower_bound(v.begin(),v.end(),a)-v.begin();}
template<class T> ll UB(vector<T> &v,T a){return upper_bound(v.begin(),v.end(),a)-v.begin();}
template<class T> bool chmin(T &a,T b){if(a>b){a=b;return 1;}else return 0;}
template<class T> bool chmax(T &a,T b){if(a<b){a=b;return 1;}else return 0;}
template<class T> void So(vector<T> &v) {sort(v.begin(),v.end());}
template<class T> void Sore(vector<T> &v) {sort(v.begin(),v.end(),[](T x,T y){return x>y;});}
void yneos(bool a,bool upp=0){if(a) cout<<(upp?"YES\n":"Yes\n"); else cout<<(upp?"NO\n":"No\n");}
template<class T> void vec_out(vector<T> &p,int ty=0){
if(ty==2){cout<<'{';for(int i=0;i<(int)p.size();i++){if(i){cout<<",";}cout<<'"'<<p[i]<<'"';}cout<<"}\n";}
else{if(ty==1){cout<<p.size()<<"\n";}for(int i=0;i<(int)(p.size());i++){if(i) cout<<" ";cout<<p[i];}cout<<"\n";}}
template<class T> T vec_min(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmin(ans,x);return ans;}
template<class T> T vec_max(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmax(ans,x);return ans;}
template<class T> T vec_sum(vector<T> &a){T ans=T(0);for(auto &x:a) ans+=x;return ans;}
int pop_count(long long a){int res=0;while(a){res+=(a&1),a>>=1;}return res;}
struct mint{
    static constexpr int  m = 998244353;
    int x;
    mint() : x(0){}
    mint(long long x_):x(x_ % m){if (x < 0) x += m;}
    int val(){return x;}
    mint &operator+=(mint b){if ((x += b.x) >= m) x -= m; return *this;}
    mint &operator-=(mint b){if ((x -= b.x) < 0) x += m; return *this;}
    mint &operator*=(mint b){x= (long long)(x) * b.x % m; return *this;}
    mint pow(long long e) const {
        mint r = 1,b =*this;
        while (e){
            if (e & 1) r *= b;
            b *= b;
            e >>= 1;
        }
        return r;
    }
    mint inv(){return pow(m - 2);}
    mint &operator/=(mint b){return *this *= b.pow(m - 2);}
    friend mint operator+(mint a, mint b){return a += b;}
    friend mint operator-(mint a, mint b){return a -= b;}
    friend mint operator/(mint a, mint b){return a /= b;}
    friend mint operator*(mint a, mint b){return a *= b;}
    friend bool operator==(mint a, mint b){return a.x == b.x;}
    friend bool operator!=(mint a, mint b){return a.x != b.x;}
};
void solve();
// oddloop
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int t=1;
    cin>>t;
    rep(i,0,t) solve();
}
void solve(){
    ll N;
    cin>>N;
    vector<mint> X(N),Y(N),R(N);
    rep(i,0,N){
        ll x,y;
        cin>>x>>y;
        X[i]=x,Y[i]=y;
        R[i]=X[i]*X[i]+Y[i]*Y[i];
    }
    mint ans=0;
    mint A=0,B=0,C=0,D=0;
    rep(i,0,N){
        A+=R[i],B+=1/R[i];
        mint c=(X[i]*X[i]-Y[i]*Y[i])/R[i];
        mint d=(X[i]*Y[i]*(-2))/R[i];
        C+=c,D+=d;
        ans+=1;
    }
    //cout<<A.val()<<" "<<B.val()<<" "<<C.val()<<" "<<D.val()<<" "<<ans.val()<<endl;
    ans+=(A*B-N);
    ans-=C*C+D*D;
    cout<<ans.val()<<"\n";
}
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