牛客网https://ac.nowcoder.com/acm/contest/322/M

https://ac.nowcoder.com/acm/contest/322/M

#include 
#include 
#include 
#include 
#include 
using namespace std;
typedef long long LL;
const int maxN=1e6+5;
int ans[200005],a[maxN],N;
int main()
{
    cin>>N;
    int l,r;
    for(int i=1;i<=N;i++)
    {
        scanf("%d%d",&l,&r);
        a[l]++;
        a[r+1]--;
    }
    ans[a[0]]++;
    for(int i=1;i<=1000000;i++)
    {
        a[i]+=a[i-1];
        ans[a[i]]++;
    }
    for(int i=1;i