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#include <iostream> #include <algorithm> using namespace std; int main() { int n, x; cin >> n >> x; pair<int, int> niza[n]; for(int i = 0; i < n; i++) { cin >> niza[i].first; niza[i].second = i; } sort(niza, niza + n); int s = 0, e = n - 1; int o = -1, p = -1; while(s < e) { if(niza[s].first + niza[e].first == x) { cout << niza[s].second + 1<< " " << niza[e].second + 1<< endl; return 0; } else if(niza[s].first + niza[e].first < x) { s++; } else{e--;} } cout << "IMPOSSIBLE" << endl; return 0; }
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