Submission #1306986

#	Time	Username	Problem	Language	Result	Execution time	Memory
1306986		michael12	Souvenirs (IOI25_souvenirs)	C++20	25 / 100	12 ms	408 KiB

souvenirs

#include "souvenirs.h"
#include<bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define sm pair<vector<int>, long long>
using namespace std;
const int maxn = 5e5;
long long tree[4 * maxn];
long long a[maxn];
void build(int node, int start, int end){
    if(start == end){
        tree[node] = a[start];
    }
    else{
        int mid = (start + end) / 2;
        build(2 * node, start, mid);
        build(2 * node + 1, mid + 1, end);
        tree[2 * node] = tree[2 * node + 1] + tree[2 * node + 1];
    }
}
int query(int node, int start, int end, int l, int r){
    if(start > r || end < l) return 0;
    if(start >= l && end <= l) return tree[node];
    int mid = (start + end) / 2;
    int l1 = query(2 * node, start, mid, l, r);
    int r1 = query(2 * node + 1, mid + 1, end, l, r);
    return l1 + r1;

}
void sub3(int n, long long P0){
   sm T = transaction(P0 - 1);
   if(T.ff.size() == 1){
      long long p1 = P0 - 1 - T.ss;
      transaction(p1 - 1);
      transaction(p1 - 1);
   }
   else{
     long long sm2 = P0 - 1 - T.ss;
     transaction(sm2 / 2);
   }
}
void buy_souvenirs(int N, long long P0){
     long long p = P0;
     if(N == 2){
     transaction(p - 1);
     return;
     }
     else if(N == 3){
        sub3(N, P0);
        return;
     }
     else if(P0 == N){
        for(int i = N - 1; i >= 1; i--){
            for(int j = 1; j <= N - i; j++){
                transaction(i);
            }
        }
        return;
     }
     else{
        a[0] = P0;
        for(int i = 0; i < N - 1; i++){
            sm T = transaction(a[i] - 1);
            if(T.ss == 1){
                a[i + 1] = a[i] + 2;
            }
            else{
                a[i + 1] = a[i] + 1;
            }
        }
        build(1, 0, N - 1);
        for(int i = 1; i < N; i++){
            transaction(query(1, 0, N - 1, i, N - 1));
        }
        return;
     }

     return;
     
}

• Subtask 0: 0 / 0
• Subtask 1: 4 / 4
• Subtask 2: 3 / 3
• Subtask 3: 0 / 14
• Subtask 4: 18 / 18
• Subtask 5: 0 / 28
• Subtask 6: 0 / 33