Submission #1925677


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#include <bits/stdc++.h>
using namespace std;
#define L 100001
long q;
vector < long> prim(L,0),tmp(L,1);;
void init()
{
    long i,j;
    for (i=2;i<=sqrt(L);i++)
        if (tmp[i])
            for (j=2*i;j<L;j+=i)
                tmp[j]=0;
    tmp[0]=tmp[1]=0;
    for (i=1;i<L;i+=2)
        if (tmp[i]&&tmp[(i+1)/2]) prim[i]=1;
    for (i=1;i<L;i++)
        prim[i]+=prim[i-1];
}
void solve()
{
    while(q--)
    {
        long l,r;
        scanf("%ld%ld",&l,&r);
        if (l==r)
        {
            if (tmp[l]&&tmp[(l+1)/2]) printf("1\n");
            else printf("0\n");
        }
        else printf("%ld\n",prim[r]-prim[l-1]);
    }
}
int main()
{
    init();
    while(~scanf("%ld",&q))
        solve();
}

Submission Info

Submission Time
Task D - 2017-like Number
User wahahawa
Language C++14 (GCC 5.4.1)
Score 400
Code Size 756 Byte
Status AC
Exec Time 37 ms
Memory 2176 KB

Compile Error

./Main.cpp: In function ‘void solve()’:
./Main.cpp:24:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%ld%ld",&l,&r);
                              ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 400 / 400
Status
AC × 3
AC × 10
Set Name Test Cases
Sample sample_01.txt, sample_02.txt, sample_03.txt
All 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, sample_01.txt, sample_02.txt, sample_03.txt
Case Name Status Exec Time Memory
01.txt AC 36 ms 2176 KB
02.txt AC 36 ms 2176 KB
03.txt AC 37 ms 2176 KB
04.txt AC 36 ms 2176 KB
05.txt AC 27 ms 2176 KB
06.txt AC 28 ms 2176 KB
07.txt AC 35 ms 2048 KB
sample_01.txt AC 3 ms 1792 KB
sample_02.txt AC 3 ms 1792 KB
sample_03.txt AC 3 ms 1792 KB