# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
249204 | blacktulip | Shell (info1cup18_shell) | C++17 | 405 ms | 21624 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 lo;
typedef pair< lo,lo > PII;
#define fi first
#define se second
#define mp make_pair
#define endl "\n"
#define pb push_back
#define int long long
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define FOR for(int i=1;i<=n;i++)
#define mid ((start+end)/2)
#define ort ((bas+son)/2)
const lo inf = 1000000000000000000;
const lo KOK = 100000;
const lo LOG = 30;
const lo li = 500005;
const lo mod = 1000000007;
int n,m,b[li],a[li],k,flag,t,dp[1505];
int cev;
string s;
vector<int> v[li];
inline int add(int x,int y){
if(x+y>=mod)return x+y-mod;
return x+y;
}
inline int f(int sira,int gel){
int cevv=0;
if(sira==gel){
//~ if(num<=k)return 0;
return 1;
}
if(~dp[sira])return dp[sira];
for(int i=0;i<(int)v[sira].size();i++){
int go=v[sira][i];
cevv=add(cevv,f(go,gel));
}
return dp[sira]=cevv;
}
inline int mul(int x,int y){
return (x%mod)*(y%mod)%mod;
}
main(void){
memset(dp,-1,sizeof(dp));
scanf("%lld %lld %lld",&n,&m,&k);
for(int i=1;i<=k;i++){
scanf("%lld",&a[i]);
}
for(int i=1;i<=m;i++){
int x,y;
//~ if(vis[x][y])continue;
scanf("%lld %lld",&x,&y);
//~ v[x].pb(y);
v[y].pb(x);
}
a[0]=1;
cev=1;
for(int i=1;i<=k;i++){
memset(dp,-1,sizeof(dp));
cev=mul(cev,f(a[i],a[i-1]));
}
printf("%lld\n",cev);
return 0;
}
Compilation message (stderr)
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