Submission #3778764
Source Code Expand
#include<cmath> #include<cstdio> #include<cstring> #include<iostream> #include<algorithm> using namespace std; const int mod=1e9+7; const int maxn=1000; int n,m,k,ans=1,tot=1,tail,cnt,Time; int pre[maxn*2+8],now[maxn+8],son[maxn*2+8]; int fac[maxn*2+8],fact[maxn*2+8],st[maxn+8]; int dfn[maxn+8],low[maxn+8]; bool vis[maxn*2+8],color[maxn+8]; int read() { int x=0,f=1;char ch=getchar(); for (;ch<'0'||ch>'9';ch=getchar()) if (ch=='-') f=-1; for (;ch>='0'&&ch<='9';ch=getchar()) x=x*10+ch-'0'; return x*f; } void add(int u,int v) { pre[++tot]=now[u]; now[u]=tot; son[tot]=v; } int C(int n,int m){return 1ll*fac[n]*fact[m]%mod*fact[n-m]%mod;} int power(int a,int k) { int sum=1; for (;k;k>>=1,a=1ll*a*a%mod) if (k&1) sum=1ll*sum*a%mod; return sum; } int gcd(int n,int m){return n?gcd(m%n,n):m;} void tarjan(int x) { dfn[x]=low[x]=++Time; for (int p=now[x];p;p=pre[p]) { int child=son[p]; //if (child==fa||dfn[child]>dfn[x]) continue; if (color[p]) continue; color[p]=color[p^1]=1; st[++tail]=p; if (!dfn[child]) { tarjan(child); low[x]=min(low[x],low[child]); if (low[child]>=dfn[x]) { //puts("Link Start"); bool flag=1;int cnt=0,tmp=0; for (int i=tail;st[i+1]!=p;cnt++,i--) if (vis[son[st[i]]]) flag=0; else vis[son[st[i]]]=1; if (flag) { for (int i=1;i<=cnt;i++) tmp=(tmp+power(k,gcd(cnt,i)))%mod; tmp=1ll*tmp*power(cnt,mod-2)%mod; } else tmp=C(cnt+k-1,k-1); ans=1ll*ans*tmp%mod; while(st[tail+1]!=p) vis[son[st[tail]]]=0,tail--; // puts("Over"); } } else low[x]=min(low[x],dfn[child]); } } int main() { n=read(),m=read(),k=read(); fac[0]=fact[0]=1; for (int i=1;i<=m+k;i++) fac[i]=1ll*fac[i-1]*i%mod; fact[m+k]=power(fac[m+k],mod-2); for (int i=m+k-1;i;i--) fact[i]=1ll*fact[i+1]*(i+1)%mod; for (int i=1;i<=m;i++) { int u=read(),v=read(); add(u,v),add(v,u); } for (int i=1;i<=n;i++) if (!dfn[i]) tarjan(i); printf("%d\n",ans); return 0; }
Submission Info
Submission Time | |
---|---|
Task | F - Painting Graphs with AtCoDeer |
User | AlseoRoplyer |
Language | C++14 (GCC 5.4.1) |
Score | 1300 |
Code Size | 2205 Byte |
Status | AC |
Exec Time | 1 ms |
Memory | 256 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 1300 / 1300 | ||||
Status |
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Set Name | Test Cases |
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Sample | 0_000.txt, 0_001.txt, 0_002.txt |
All | 0_000.txt, 0_001.txt, 0_002.txt, 1_003.txt, 1_004.txt, 1_005.txt, 1_006.txt, 1_007.txt, 1_008.txt, 1_009.txt, 1_010.txt, 1_011.txt, 1_012.txt, 1_013.txt, 1_014.txt, 1_015.txt, 1_016.txt, 1_017.txt, 1_018.txt, 1_019.txt, 1_020.txt, 1_021.txt, 1_022.txt, 1_023.txt, 1_024.txt, 1_025.txt, 1_026.txt, 1_027.txt, 1_028.txt, 1_029.txt, 1_030.txt, 1_031.txt, 1_032.txt, 1_033.txt, 1_034.txt, 1_035.txt, 1_036.txt, 1_037.txt, 1_038.txt, 1_039.txt, 1_040.txt, 1_041.txt, 1_042.txt, 1_043.txt, 1_044.txt, 1_045.txt, 1_046.txt, 1_047.txt, 1_048.txt, 1_049.txt, 1_050.txt, 1_051.txt, 1_052.txt, 1_053.txt, 1_054.txt, 1_055.txt, 1_056.txt, 1_057.txt, 1_058.txt, 1_059.txt, 1_060.txt, 1_061.txt, 1_062.txt, 1_063.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
0_000.txt | AC | 1 ms | 256 KB |
0_001.txt | AC | 1 ms | 256 KB |
0_002.txt | AC | 1 ms | 256 KB |
1_003.txt | AC | 1 ms | 256 KB |
1_004.txt | AC | 1 ms | 256 KB |
1_005.txt | AC | 1 ms | 256 KB |
1_006.txt | AC | 1 ms | 256 KB |
1_007.txt | AC | 1 ms | 256 KB |
1_008.txt | AC | 1 ms | 256 KB |
1_009.txt | AC | 1 ms | 256 KB |
1_010.txt | AC | 1 ms | 256 KB |
1_011.txt | AC | 1 ms | 256 KB |
1_012.txt | AC | 1 ms | 256 KB |
1_013.txt | AC | 1 ms | 256 KB |
1_014.txt | AC | 1 ms | 256 KB |
1_015.txt | AC | 1 ms | 256 KB |
1_016.txt | AC | 1 ms | 256 KB |
1_017.txt | AC | 1 ms | 256 KB |
1_018.txt | AC | 1 ms | 256 KB |
1_019.txt | AC | 1 ms | 256 KB |
1_020.txt | AC | 1 ms | 256 KB |
1_021.txt | AC | 1 ms | 256 KB |
1_022.txt | AC | 1 ms | 256 KB |
1_023.txt | AC | 1 ms | 256 KB |
1_024.txt | AC | 1 ms | 256 KB |
1_025.txt | AC | 1 ms | 256 KB |
1_026.txt | AC | 1 ms | 256 KB |
1_027.txt | AC | 1 ms | 256 KB |
1_028.txt | AC | 1 ms | 256 KB |
1_029.txt | AC | 1 ms | 256 KB |
1_030.txt | AC | 1 ms | 256 KB |
1_031.txt | AC | 1 ms | 256 KB |
1_032.txt | AC | 1 ms | 256 KB |
1_033.txt | AC | 1 ms | 256 KB |
1_034.txt | AC | 1 ms | 256 KB |
1_035.txt | AC | 1 ms | 256 KB |
1_036.txt | AC | 1 ms | 256 KB |
1_037.txt | AC | 1 ms | 256 KB |
1_038.txt | AC | 1 ms | 256 KB |
1_039.txt | AC | 1 ms | 256 KB |
1_040.txt | AC | 1 ms | 256 KB |
1_041.txt | AC | 1 ms | 256 KB |
1_042.txt | AC | 1 ms | 256 KB |
1_043.txt | AC | 1 ms | 256 KB |
1_044.txt | AC | 1 ms | 256 KB |
1_045.txt | AC | 1 ms | 256 KB |
1_046.txt | AC | 1 ms | 256 KB |
1_047.txt | AC | 1 ms | 256 KB |
1_048.txt | AC | 1 ms | 256 KB |
1_049.txt | AC | 1 ms | 256 KB |
1_050.txt | AC | 1 ms | 256 KB |
1_051.txt | AC | 1 ms | 256 KB |
1_052.txt | AC | 1 ms | 256 KB |
1_053.txt | AC | 1 ms | 256 KB |
1_054.txt | AC | 1 ms | 256 KB |
1_055.txt | AC | 1 ms | 256 KB |
1_056.txt | AC | 1 ms | 256 KB |
1_057.txt | AC | 1 ms | 256 KB |
1_058.txt | AC | 1 ms | 256 KB |
1_059.txt | AC | 1 ms | 256 KB |
1_060.txt | AC | 1 ms | 256 KB |
1_061.txt | AC | 1 ms | 256 KB |
1_062.txt | AC | 1 ms | 256 KB |
1_063.txt | AC | 1 ms | 256 KB |