The 2021 ICPC Asia Regionals Online Contest (II)

G

#include 
#define INF 0x3f3f3f3f
#define mod 998244353
#define ll long long
using namespace std;
const int N=1e5+5;
int n,t,a[N],x,y,z,b;
void solve()
{
	cin>>n>>t;
	b=t;
	for(int i=1;i<=n;i++){
		cin>>x>>y;
		z=y;
		for(int j=1;j<=t;j++){
			a[j]+=(j%2==1?1:-1)*x*z;z*=y;
		}
	}
	if(!t){
		cout<<0<<'n';
		return ;
	}
	for(int i=1;it;
    //while(t--){
        solve();
    //}
}