Range Sum Queries I - C++

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;typedef long double lf;typedef double fl;typedef string str;
typedef vector<int> vi;typedef vector<vector<int>> vvi;typedef vector<fl> vf;typedef vector<ll> vl;
typedef vector<lf> vlf;typedef vector<char> vc;typedef vector<str> vs;typedef pair<int,int> ii;

# define f(i,a,b,c) for(ll i=a;i<b;i+=c)
# define fd(i,a,b,c) for(ll i=a;i>=b;i-=c)

ll soma[200000], au, n, q, x, y;
int main(){
   ios::sync_with_stdio(0);cin.tie(0);cout.precision(2);cout.setf(ios::fixed);

    cin>>n>>q;
    soma[0] = 0;
    f(i,1,n+1,1){
        cin>>au;
        soma[i] = soma[i-1]+au;
    }
    f(i,0,q,1){
        cin>>x>>y;
        cout<<soma[y]-soma[x-1]<<'\n';
    }

}