| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 1285931 | nozika | Souvenirs (IOI25_souvenirs) | C++20 | 13 ms | 400 KiB |
#include <bits/stdc++.h>
#include "souvenirs.h"
using namespace std;
pair<vector<int>, long long> transaction(long long M);
void buy_souvenirs(int n, long long P0) {
pair<vector<int>, long long> vp;
if (n==2){
transaction(P0-1);
}
else if (n==3){
vp=transaction(P0-1);
if (vp.first.size()==1){
long long tt=vp.second;
long long p2=P0-1-tt;
transaction(p2-1);
transaction(p2-1);
}
else{
long long tt=vp.second;
long long p2=(P0-1-tt)/2;
transaction(p2);
}
}
else{
long long sm=n-2;
for (int i=1; i<n; i++){
long long cnt=i-1;
if (i==n-1){
cnt=sm;
}
vp=transaction(P0-1);
long long tt=vp.second;
if (vp.first.size()==2){sm--;tt++;}
long long pk=P0-1-tt;
P0=pk;
for (int j=0; j<cnt; j++){
transaction(pk);
}
}
}
}
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