Submission #1925243

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Source Code Expand

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

Submission Info

Compile Error

./Main.cpp: In function ‘void solve()’:
./Main.cpp:27:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%ld%ld",&l,&r);
                              ^

Judge Result