# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
1252281 | tranvinhhuy2010 | Souvenirs (IOI25_souvenirs) | C++20 | 1 ms | 416 KiB |
#include "souvenirs.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int n, cnt[105] = {};
ll p[105] = {};
bool known[105] = {};
ll adu_calculate(ll s, int k) {
s += k*(k-1)/2 + k - 1;
return s/k;
}
int adu_build(ll money) {
auto [v, remain] = transaction(money);
ll sum = money - remain;
for (int i : v)
cnt[i]++;
while (!known[v[0]]) {
while (known[v.back()]) {
sum -= p[v.back()];
v.pop_back();
}
if (known[v[0]+1]) break;
adu_build(adu_calculate(sum, v.size()) - 1);
}
p[v[0]] = sum;
}
void adu_complete() {
for (int i=1; i<n; i++) {
while (cnt[i]<i) {
transaction(p[i]);
cnt[i]++;
}
}
}
void buy_souvenirs(int N, ll P0) {
n = N;
p[0] = P0;
known[n] = true;
adu_build(P0-1);
adu_complete();
}
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