Submission #402566

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
402566	2021-05-12 00:42:34	penguinhacker	Exercise Deadlines (CCO20_day1problem2)	C++14	25 / 25	309 ms	22748 KiB

Main

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#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ar array
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
const int mxN=2e5;
int n, a[mxN];
vector<int> oc[mxN];
ll ans;
set<int> s;
tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> t;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cin >> n;
  for (int i=0; i<n; ++i) {
    cin >> a[i], --a[i];
    oc[a[i]].push_back(i);
  }
  for (int i=n-1; ~i; --i) {
    for (int j : oc[i])
      s.insert(j);
    if (s.empty()) {
      cout << -1;
      return 0;
 
 
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• Subtask 1: 17 / 17
• Subtask 2: 8 / 8