# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
250773 | dvdg6566 | Mobitel (COCI19_mobitel) | C++14 | 379 ms | 47520 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<ll> vi;
typedef pair<ll,ll> pi;
typedef vector<pi> vpi;
typedef double ld;
#define pb emplace_back
#define mp make_pair
#define lb lower_bound
#define ub upper_bound
#define ALL(x) x.begin(), x.end()
#define SZ(x) (ll)x.size()
#define f first
#define s second
const ll MAXN=310;
const ll MAXK=1000001;
const ll INF = 1e13;
const ll MOD = 1e9+7;
vi V;
ll R,C,N;
ll A[MAXN][MAXN];
ll mx[MAXK];
ll dp[MAXN][2][2010];
inline int ask(int x){
if(x>=N)return SZ(V)-1;
return mx[x];
}
int main(){
ios_base::sync_with_stdio(0);cin.tie(0);
cin>>R>>C>>N;
for(int i=0;i<R;++i)for(int j=0;j<C;++j)cin>>A[i][j];
for(int i=1;i<=N;++i)V.pb(N/i);
sort(ALL(V));
V.resize(unique(ALL(V))-V.begin());
memset(mx,-1,sizeof(mx));
for(int i=0;i<SZ(V);++i)mx[V[i]]=i;
for(int i=1;i<=N;++i)if(mx[i]==-1)mx[i]=mx[i-1];
ll m=1;
for(int i=0;i<C;++i){
m*=A[0][i];
if(m>N)m=N;
dp[i][0][ask(m)]=1;
}
bool t=1;
for(int i=1;i<R;++i){
for(int j=0;j<C;++j)for(int w=0;w<SZ(V);++w){
dp[j][t][w]=0;
}
for(int j=0;j<C;++j)for(int w=0;w<SZ(V);++w){
// for each dp[j][1^t][w]
int x=ask(V[w]*A[i][j]);
dp[j][t][x]+=dp[j][1^t][w];
dp[j][t][x]%=MOD;
}
for(int j=0;j<C-1;++j)for(int w=0;w<SZ(V);++w){
int x=ask(V[w]*A[i][j+1]);
dp[j+1][t][x]+=dp[j][t][w];
dp[j+1][t][x]%=MOD;
}
// cerr<<"Row "<<i<<'\n';
// for(int j=0;j<C;++j){
// cerr<<"Col "<<j<<'\n';
// for(int w=0;w<SZ(V);++w){
// if(!dp[j][t][w])continue;
// cerr<<V[w]<<' ';
// // cerr<<dp[j][t][w]<<' ';
// }
// cerr<<'\n';
// }
t^=1;
}
t^=1;
cout<<dp[C-1][t][SZ(V)-1];
}
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