题目简单描述就是求数组中[l,r]区间的和

#include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          using namespace std;int main(){    int n,m;    cin >> n;    vector
          
            v(n+1,0); for(int i= 1 ; i <= n ; ++ i) cin >> v[i]; vector
           
             u(v.begin(),v.end()); sort(u.begin(),u.end()); for(int i = 1; i <=n; ++ i){ v[i]+=v[i-1]; u[i]+=u[i-1]; } cin >> m; for(int i = 0; i < m; ++ i){ int number,l,r; cin >> number >> l >> r; if(number == 1) cout<
            
             <