Submission #307212

#	Time	Username	Problem	Language	Result	Execution time	Memory
307212		NintsiChkhaidze	Exercise Deadlines (CCO20_day1problem2)	C++14	0 / 25	6 ms	5248 KiB

Main

#include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define left (node<<1),l,((l+r)>>1)
#define right ((node<<1)|1),((l+r)>>1) + 1,r
#define N 200005
#define int long long
using namespace std;
priority_queue <int> q;
int fen[200005];
vector <int> v[200005];
void upd(int in,int val){
    while (in <= N){
        fen[in]+=val;
        in += (in&(-in));
    }
}
int get(int in){
    int sum=0;
    while (in > 0){
        sum+=fen[in];
        in -= (in&(-in));
    }
    return sum;
}
main(){
    ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
    int n;
    cin>>n;
    
    for (int i=1;i<=n;i++){
        int a;
        cin>>a;
        v[a].pb(i);
    }

    int ind = n,ans = 0;
    while (ind > 0){
        for (int i = 0; i < v[ind].size(); i++)
            q.push(v[ind][i] - get(v[ind][i] - 1));
        
        if (q.size() == 0){
            cout<<-1;
            return 0;
        }
        int x = q.top();
        q.pop();
        ans+=ind - x;
        upd(x,1),upd(ind + 1,-1);
        ind--;
    } 
    cout<<ans;
}

Compilation message (stderr)

Main.cpp:27:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   27 | main(){
      |      ^
Main.cpp: In function 'int main()':
Main.cpp:40:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int, std::allocator<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         for (int i = 0; i < v[ind].size(); i++)
      |                         ~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 17
• Subtask 2: 0 / 8