Giới thiệu
include<bits/stdc++.h>
using namespace std;
using ll = long long;
const int LIM = 1e6 + 16;
int a[LIM];
int main(){
int n, x; cin >> n >> x;
for(int i = 1; i <= n; i++){
cin >> a[i];
}
for(int l = 1, r = n; l < r; l++){
while(l < r - 1 && a[l] + a[r] > x) --r;
if(a[l] + a[r] == x){
cout << l << " " << r;
return 0;
}
}
cout << "No solusion";
return 0;
}