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| #include<bits/stdc++.h> #define int long long #define ull unsigned long long #define maxn 505 #define put() putchar('\n') #define Tp template<typename T> #define Ts template<typename T,typename... Ar> using namespace std; Tp void read(T &x){ int f=1;x=0;char c=getchar(); while (c<'0'||c>'9') {if (c=='-') f=-1;c=getchar();} while (c>='0'&&c<='9') {x=x*10+c-'0';c=getchar();} x*=f; } namespace Debug{ Tp void _debug(char* f,T t){cerr<<f<<'='<<t<<endl;} Ts void _debug(char* f,T x,Ar... y){while(*f!=',') cerr<<*f++;cerr<<'='<<x<<",";_debug(f+1,y...);} #define gdb(...) _debug((char*)#__VA_ARGS__,__VA_ARGS__) }using namespace Debug; #define fi first #define se second #define mk make_pair const int mod=998244353; int power(int x,int y=mod-2) { int sum=1; while (y) { if (y&1) sum=sum*x%mod; x=x*x%mod;y>>=1; } return sum; } int n,m; int dis[maxn][maxn],cnt[maxn][maxn],ans[maxn][maxn]; vector<int>to[maxn]; queue<int>q; void bfs(int id) { int x; q.push(id);dis[id][id]=0;cnt[id][id]=1; while (!q.empty()) { x=q.front();q.pop(); for (auto y:to[x]) if (dis[id][y]>dis[id][x]+1) dis[id][y]=dis[id][x]+1,cnt[id][y]=cnt[id][x],q.push(y); else if (dis[id][y]==dis[id][x]+1) cnt[id][y]=min(cnt[id][y]+cnt[id][x],2ll); } } void calc(int s,int t) { int x,res=1; for (x=1;x<=n;x++) { if (dis[s][x]+dis[t][x]==dis[s][t]) continue; int sum=0; for (auto y:to[x]) if (dis[s][x]==dis[s][y]+1&&dis[t][x]==dis[t][y]+1) sum++; res=res*sum%mod; } ans[s][t]=ans[t][s]=res; } signed main(void){ int i,j,x,y; memset(dis,0x3f,sizeof(dis)); read(n);read(m); for (i=1;i<=m;i++) { read(x),read(y); to[x].push_back(y); to[y].push_back(x); } for (i=1;i<=n;i++) bfs(i); for (i=1;i<=n;i++) for (j=i;j<=n;j++) if (cnt[i][j]==1) { calc(i,j); } for (i=1;i<=n;i++,put()) for (j=1;j<=n;j++) printf("%lld ",ans[i][j]); return 0; }
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