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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#416424 | #8723. 乘二 | Afterlife# | WA | 0ms | 3500kb | C++20 | 1.2kb | 2024-05-21 20:30:29 | 2024-05-21 20:30:30 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
int n , k;
const int mod = 1e9 + 7;
int a[200005];
typedef long long ll;
vector<int> op;
int fpow(int a,int b) {
int ans = 1;
while(b) {
if(b & 1) ans = 1LL * ans * a %mod;
a = 1LL * a * a %mod;b >>= 1;
}
return ans;
}
int main() {
ios::sync_with_stdio(false) ; cin.tie(0) ;
cin >> n >> k;
for(int i = 1;i <= n;i++) cin >> a[i];
sort(a + 1 , a + n + 1);
multiset<ll> st;
for(int i = 1;i <= n;i++) st.insert(a[i]);
auto chk = [&]() {
auto it = st.begin() ;
auto it2 = st.end() ; it2--;
return (*it) * 2 > (*it2) ;
};
while(!chk() && k) {
auto it = st.begin() ;
ll x = (*it) * 2;
st.erase(it) ; st.insert(x) ;
k--;
}
auto sum = [&]() {
int ans = 0;
for(auto x : st) ans = (ans + x) % mod;
return ans;
};
if(!k) {
cout << sum() << '\n';
}
int mul = k / n;
int d = k % n;
while(d--) {
auto it = st.begin() ;
ll x = (*it) * 2;
st.erase(it) ; st.insert(x) ;
}
int ans = sum() ;
ans = 1LL * ans * fpow(2 , mul) % mod;
cout << ans << '\n';
}
Details
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Test #1:
score: 0
Wrong Answer
time: 0ms
memory: 3500kb
input:
3 3 7 2 1
output:
15 15
result:
wrong answer Output contains longer sequence [length = 2], but answer contains 1 elements