Submission #100370

#	Time	Username	Problem	Language	Result	Execution time	Memory
100370		Runtime_error_	Mobitel (COCI19_mobitel)	C++11	0 / 130	108 ms	66560 KiB

mobitel

#include <bits/stdc++.h>
using namespace std;
const int inf=3e2+9,mod=1e9+7;

int a[inf][inf],n,m,k,dp[inf][inf][inf],Pas[inf+inf][inf+inf];

void build(int n,int m){

    Pas[0][0]=1;
for(int i=1;i<=n+m;i++)
{
    Pas[i][0]=1;
    for(int j=1;j<=i;j++)
    Pas[i][j]=(Pas[i-1][j] + Pas[i-1] [j-1])%mod ;
}

}

int solve(int i,int j,int sum){

    if(sum>=k || i>n || j>m)
        return 0;

    if(i==n && j==m)
        return 1;

    int &ret=dp[i][j][sum];
    if(ret!=-1)
        return ret;
    
    ret=0;

        ret=((long long )ret+solve(i+1,j,sum*a[i+1][j]))%mod;

        ret=((long long )ret+solve(i,j+1,sum*a[i][j+1]))%mod;
        return ret;
}

int main(){

    cin>>n>>m>>k;
    for(int i=1;i<=n;i++)
        for(int j=1;j<=m;j++)
            cin>>a[i][j];

    build(n,m);

    memset(dp,-1,sizeof(dp));
    cout<<(Pas[n+m-2][n-1]-solve(1,1,a[1][1])+mod)%mod<<endl;
}

• Subtask 1: 0 / 130