Submission #3015939


Source Code Expand

#include <iostream>
#include <vector>
#define REP(i,n) for(int i=0;i<n;i++)
#define FOR(i,n1,n2) for(int i=n1;i<n2;i++)
#define put(a) cout<<a<<endl;
using namespace std;

int q;
vector<int> p(100010,0);
vector<int> p2(100010,0);
vector<int> s(100010,0);
vector<int> a(10000);
const int n = 100000;

int main() {
    cin >> q;
    vector<int> l(q);
    vector<int> r(q);
    REP(i,q){
        cin >> l[i] >> r[i];
    }
    p[2] = 1;
    a[0] = 2;
    int cnt= 1;
    FOR(i,3,n){
        bool flag = true;
        REP(j,cnt){
            if(i%a[j]==0){
                flag = false;
                break;
            }
        }
        if(flag){
            a[cnt++] = i;
            p[i] = 1;
        }
    }
    for(int i=1;i<n;i+=2){
        if(p[i]&&p[(i+1)/2]){
            p2[i]=1;
        }
    }
    s[0] = 0;
    REP(i, n){
        s[i+1] = s[i] + p2[i+1];
    }
    REP(i,q){
        put(s[r[i]]-s[l[i]-1]);
    }
    return 0;
}

Submission Info

Submission Time
Task D - 2017-like Number
User idaten
Language C++14 (GCC 5.4.1)
Score 400
Code Size 993 Byte
Status AC
Exec Time 363 ms
Memory 2688 KB

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 359 ms 2560 KB
02.txt AC 363 ms 2560 KB
03.txt AC 362 ms 2560 KB
04.txt AC 356 ms 2560 KB
05.txt AC 349 ms 2688 KB
06.txt AC 351 ms 2688 KB
07.txt AC 357 ms 2560 KB
sample_01.txt AC 152 ms 1408 KB
sample_02.txt AC 152 ms 1408 KB
sample_03.txt AC 152 ms 1408 KB