number: #include <bits/stdc++.h> using namespace std; long long t,n,x; int zhuwei(long long a){ int cnt=0; while(a){ a/=10; cnt++; } return cnt; } int main(){ freopen("number.in","r",stdin); freopen("numder.out","w",stdout); cin>>t; for(int i=1;i<=t;i++){ cin>>n>>x; long long y=n*x; string e=to_string(x); if(zhuwei(y)==5 && e[0]!='0'){ cout<<"YES\n"; }else{ cout<<"NO\n"; } } return 0; } farm: #include <bits/stdc++.h> using namespace std; int a[100005],n,k,x[100005],y[100005]; int main(){ freopen("farm.in","r",stdin); freopen("farm.out","w",stdout); cin>>n; for(int i=1;i<=n;i++){ cin>>a[i]; } cin>>k; for(int i=1;i<=k;i++){ cin>>x[i]>>y[i]; } for(int i=1;i<=k;i++){ int sum=0; for(int j=1;j<=n;j++){ if(a[j]x[i]){ a[j]=y[i]; } sum+=a[j]; } cout<<sum<<"\n"; } return 0; } reading: #include <bits/stdc++.h> using namespace std; long long t,x,y,r; int main(){ freopen("reading.in","r",stdin); freopen("reading.out","w",stdout); cin>>t; for(int i=1;i<=t;i++){ cin>>x>>y>>r; if((x+r/5)%y0){ cout<<(x+r/5)/y<<endl; continue; } cout<<(x+r/5)/y+1<<endl; } return 0; } garden: #include <bits/stdc++.h> using namespace std; int t,n,m,h,a[1000005],b[1000000]; bool cmp(int a,int b){ return a>b; } int main(){ freopen("garden.in","r",stdin); freopen("garden.out","w",stdout); cin>>t; while(t--){ int sum=0; cin>>n>>m>>h; for(int i=1;i<=n;i++){ cin>>a[i]; } for(int i=1;i<=m;i++){ cin>>b[i]; } sort(b+1,b+1+m,cmp); sort(a+1,a+1+n,cmp); for(int i=1;i<=min(n,m);i++){ if(a[i]<b[i]*h){ sum+=a[i]; }else{ sum+=(b[i]*h); } } cout<<sum<<endl; } return 0; }