delete pics to save space

2.10539.cpp

@@ -0,0 +1,39 @@
+#include<cstdio>
+#include<cmath>
+#include<algorithm>
+using namespace std;
+const int maxn=1000000;
+bool vis[maxn+5]={1,1};
+int pri[80000],cnt,n;
+typedef long long LL;
+LL L,R,t;
+int res;
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	int m=(int)sqrt(maxn+0.5),c=0,i,j;
+	for(i=2;i<=m;i++)
+		if(!vis[i])
+			for(j=i*i;j<=maxn;j+=i) vis[j]=1;
+	for(i=2;i<=maxn;i++)
+		if(!vis[i]) pri[cnt++]=i;
+	scanf("%d",&n);
+	while(n-->0)
+	{
+		scanf("%lld%lld",&L,&R);
+		res=0;
+		for(int i=0;i<cnt;i++)
+		{
+			t=(LL)pri[i]*pri[i];
+			while(t<=R)
+			{
+				if(t>=L) res++;
+				t*=pri[i];
+			}
+		}
+		printf("%d\n",res);
+	}
+	return 0;
+}