Solutions of k-th element - MarisaOJ: Marisa Online Judge

Solutions of k-th element

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User Avatar toshirohitsugaya    Created at    1 likes

# Nên sử dụng C++ STL Vector # Note: ## Sử dụng bắt đầu từ chỉ số 1 trong vector ```cpp #include <bits/stdc++.h> using namespace std; int main(){ ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0); int n,q; cin >> n >> q; vector<int> a(n + 1); for(int i = 1 ;i <= n;i++){ cin >> a[i]; } while(q--){ int c; cin >> c; if(c == 1){ int tmp; cin >> tmp; a.push_back(tmp); } if(c == 2){ if(a.size()){ a.pop_back(); } } if(c == 3){ int x; cin >> x; cout << a[x] << "\n"; } } return 0; } ```