题解:
数学推导的问题,暴力明显不行那就猜结论
#include<algorithm>
#include<cstdio>
#include<cmath>
#include<iostream>
#include<cstring>
#include<set>
#include<map>
#include<iterator>
#include<queue>
#include<vector>
#include<string>
using namespace std;
typedef long long ll;
const int N=1e6+10;
const long long INF=1e18;
const double eps=0.0000001;
int a[N];
char b[100][100];
int main()
{
ios::sync_with_stdio(false);
cin.tie(0);
ll n=0,m=0,r,ans,one=0,two=0;
ll x,y,z,t,l;
scanf("%lld",&t);
ll s=0,sum;
while(t--)
{
scanf("%lld%lld",&l,&r);
if((l-1)%192==0)
n=(l-1)/192;
else if(((l-1)/192+1)*192+1<=r)
n=(l-1)/192+1;
else
n=(l-1)/192;
m=(r-1)/192;
sum=(n+m)*(m-n+1)/2;
s=m-n+1+sum*192;
printf("%lld\n",s);
}
}