code

include<bits/stdc++.h>

define ll long long

define f(i,a,b) for(ll i=a;i<=b;i++)

define fd(i,a,b) for(ll i=a;i>=b;i--)

using namespace std;
ll n,q,x,y;
ll a[10000006],b[10000004],t[10000009];
void doc()
{
cin>>n>>q;
t[0]=0;
f(i,1,n)
{
cin>>a[i];
t[i]=t[i-1]+a[i];
}
}
void xuly()
{
while(q--)
{
cin>>x>>y;
cout<<t[y]-t[x-1]<<endl;
}
}
int main()
{
doc();
xuly();
return 0;
}

include <bits/stdc++.h>

using namespace std;

define ll long long

define endl "\n"

int main(){
ios_base::sync_with_stdio(false);
cin.tie(0); cout.tie(0);
int n, x; cin >> n >> x;
int a[n];
for(int i=0; i<n; i++) cin >> a[i];
int i, j; i = 0;
j = n-1;
int check = 0;
while(i < j){
if(a[i] + a[j] == x){
cout << i+1 << " " << j+1;
check = 1;
break;
}
else if(a[i] + a[j] > x){
j--;
}
else if(a[i] + a[j] < x){
i++;
}
}
if(check == 0) cout << "No solution";
}

tap code de sau nay di thi