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why WA? give me a reason..... thax!!!!!!!!!!!!!#include<iostream> #include<algorithm> using namespace std; struct tt { int a,b,w; }; struct tt s[16000]; long f[1010],t[1010][2]; int cmp(struct tt a, struct tt b) { return a.w<b.w; } int find(int k) { if (f[k]==k) return k; f[k]=find(f[k]); return f[k]; } main() { int n,m,i,res,k,w; cin>>n>>m; for (i=1;i<=n;i++) f[i]=i; for (i=0;i<=m-1;i++) cin>>s[i].a>>s[i].b>>s[i].w; sort(s,s+m,cmp); res=0; w=0; for (i=0;i<=m-1;i++) if (find(s[i].a)!=find(s[i].b)) { f[find(s[i].b)]=find(s[i].a); if (res<s[i].b) res=s[i].w; w=w+1; t[w][1]=s[i].a; t[w][2]=s[i].b; } cout<<res<<endl; cout<<w<<endl; for (i=1;i<=w;i++) cout<<t[i][1]<<' '<<t[i][2]<<endl; } Followed by:
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