QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#323075 | #5661. Multi-Ladders | Rabeya# | AC ✓ | 0ms | 3720kb | C++23 | 1.4kb | 2024-02-08 12:48:36 | 2024-02-08 12:48:37 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef pair<int,int> pii;
typedef vector<int> vii;
typedef vector<ll> vll;
typedef vector<pii> vpii;
typedef unordered_map<int,int> umap;
typedef long double ld;
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define popcount __builtin_popcount
#define case cout<<"Case "<<__testcase-testcase<<":";
#define endl '\n'
const ll mod=1e9+7;
ll power(ll a,ll n=mod-2){
ll ans=1ll;
a = (mod+a)%mod;
n%=(mod-1);
while(n){
if(n&1ll) ans=(ans*a)%mod;
a=(a*a)%mod;
n>>=1;
}
return ans;
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
int testcase=1;
cin>>testcase;
int __testcase=testcase;
while(testcase--)
{
ll n,m,i,j,k,l;
cin>>n>>k>>l;
if(l<2){
cout<<0<<endl;
continue;
}
ll ans=power((l-1)+(l-2)*(l-2), n*k-k);
ll temp;
ll x=l-1;
if(k%2==0){
temp = (power(x,k)-1)*power(x+1) %mod;
temp = (temp+1)%mod;
temp = (temp*l)%mod;
}
else{
temp = (power(x,k)+1)*power(x+1) %mod;
temp = (mod+temp-1)%mod;
temp = (temp*l)%mod;
}
cout<<(ans*temp %mod)<<endl;
}
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3656kb
input:
1 2 3 3
output:
162
result:
ok single line: '162'
Test #2:
score: 0
Accepted
time: 0ms
memory: 3720kb
input:
20 2 3 3 1 3 3 10 3 0 10 3 2 1 21 2 1 22 0 2000 15000 2000 12000 30000 200000 1000000000 3 3 2 1000000000 3 2 3 100000000 1000000000 1000000000 10 1000000000 3 100000000 2 1000000000 100000000 1 1000000000 10 1 1000000000 100000000 1 1000 100000000 1000000000 1000000000 0 1000000000 1000000000 1 100...
output:
162 6 0 0 0 0 349400141 243010659 52489881 53690844 176686901 218103365 558243892 991895211 693053429 883715672 80402569 0 0 311752813
result:
ok 20 lines