#include <bits/stdc++.h>
#define DEBUG 1
using namespace std;
namespace output{
void __(short x){cout<<x;}
void __(unsigned x){cout<<x;}
void __(int x){cout<<x;}
void __(long long x){cout<<x;}
void __(unsigned long long x){cout<<x;}
void __(double x){cout<<x;}
void __(long double x){cout<<x;}
void __(char x){cout<<x;}
void __(const char*x){cout<<x;}
void __(const string&x){cout<<x;}
void __(bool x){cout<<(x?"true":"false");}
template<class S,class T>
void __(const pair<S,T>&x){__(DEBUG?"(":""),__(x.first),__(DEBUG?", ":" "),__(x.second),__(DEBUG?")":"");}
template<class T>
void __(const vector<T>&x){__(DEBUG?"{":"");bool _=0;for(const auto&v:x)__(_?DEBUG?", ":" ":""),__(v),_=1;__(DEBUG?"}":"");}
template<class T>
void __(const set<T>&x){__(DEBUG?"{":"");bool _=0;for(const auto&v:x)__(_?DEBUG?", ":" ":""),__(v),_=1;__(DEBUG?"}":"");}
template<class T>
void __(const multiset<T>&x){__(DEBUG?"{":"");bool _=0;for(const auto&v:x)__(_?DEBUG?", ":" ":""),__(v),_=1;__(DEBUG?"}":"");}
template<class S,class T>
void __(const map<S,T>&x){__(DEBUG?"{":"");bool _=0;for(const auto&v:x)__(_?DEBUG?", ":" ":""),__(v),_=1;__(DEBUG?"}":"");}
void pr(){cout<<"\n";}
template<class S,class... T>
void pr(const S&a,const T&...b){__(a);if(sizeof...(b))__(' ');pr(b...);}
}
using namespace output;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef pair<int,char> pic;
typedef pair<double,double> pdd;
typedef pair<ld,ld> pld;
typedef vector<int> vi;
typedef vector<ll> vl;
#define pb push_back
#define fox(i,x,y) for(int i=(x);i<=(y);i++)
#define foxr(i,x,y) for(int i=(y);i>=(x);i--)
const int MN = 70005;
int N, K, i, x, y, w, ds[MN], val[MN], dep[MN], par[MN], nxt, dn[2*MN], deg[MN], hmm[MN];
int fnd(int x){return ds[x]=ds[x]==x?x:fnd(ds[x]);}
vi adj[MN], g[2*MN]; pii ed[MN];
set<pii> st; map<pii,int> id, ans;
struct qur{int x, y, w, id;}q[MN];
vector<qur> a, b;
void dfs(int n,int p,int d){
dep[n] = d; par[n] = p;
for(auto v : adj[n]){
if(v==p) continue;
dfs(v, n, d+1);
}
}
int main(){
scanf("%d",&N);
for(i=1;i<N;i++){
scanf("%d%d",&x,&y);
adj[x].pb(y);
adj[y].pb(x);
id[{min(x,y),max(x,y)}]=i;
ed[i]={x,y};
}
scanf("%d",&K);
for(i=1;i<=K;i++){
char ch;
scanf(" %c%d%d%d",&ch,&x,&y,&w);
q[i]={x,y,w,N+i};
if(ch=='M') a.pb({x,y,w,N+i});
else b.pb({x,y,w,N+i});
}
sort(a.begin(),a.end(),[](qur i,qur j){return i.w<j.w;});
sort(b.begin(),b.end(),[](qur i,qur j){return i.w>j.w;});
dfs(1, 0, 1);
for(i=1;i<=N;i++)
ds[i] = i;
for(auto v : a){
x = fnd(v.x), y = fnd(v.y);
while(x!=y){
if(dep[x]<dep[y]) swap(x,y);
int cur = id[{min(x,par[x]),max(x,par[x])}];
g[v.id].pb(cur);
g[cur].pb(v.id);
hmm[cur] = v.w;
ds[x] = fnd(par[x]);
x = fnd(x);
}
}
for(i=1;i<=N;i++)
ds[i] = i;
for(auto v : b){
x = fnd(v.x), y = fnd(v.y);
while(x!=y){
if(dep[x]<dep[y]) swap(x,y);
int cur = id[{min(x,par[x]),max(x,par[x])}];
g[v.id].pb(cur);
g[cur].pb(v.id);
hmm[cur] = v.w;
ds[x] = fnd(par[x]);
x = fnd(x);
}
}
for(i=1;i<=K;i++)
deg[N+i]=g[N+i].size();
for(i=1;i<N;i++){
int res = 1<<30;
for(auto v : g[i])
res = min(res, deg[v]);
st.insert({res, i});
val[i] = res;
}
for(i=1;i<N;i++) ans[ed[i]]=1<<30;
while(st.size()){
int cur = st.begin()->second;
st.erase(st.begin());
int ot = 0, hm = 1<<30;
dn[cur] = 1;
for(auto v : g[cur]){
if(!dn[v]&°[v]<hm){
ot = v;
hm = deg[v];
}
}
if(!ot){
ans[ed[cur]]=hmm[cur];
continue;
}
for(auto v : g[cur]){
deg[v]--;
}
ans[ed[cur]]=q[ot-N].w;
dn[ot]=1;
cur = ot;
for(auto v : g[cur]){
if(dn[v]) continue;
int res = 1<<30;
for(auto u : g[v]){
if(!dn[u]) res=min(res,deg[u]);
}
st.erase({val[v], v});
val[v] = res;
st.insert({val[v], v});
}
}
for(i=1;i<N;i++){
printf("%d %d %d\n",ed[i].first,ed[i].second,ans[ed[i]]);
}
return 0;
}
Compilation message
minmaxtree.cpp: In function 'int main()':
minmaxtree.cpp:65:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d",&N);
~~~~~^~~~~~~~~
minmaxtree.cpp:67:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&x,&y);
~~~~~^~~~~~~~~~~~~~
minmaxtree.cpp:73:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d",&K);
~~~~~^~~~~~~~~
minmaxtree.cpp:76:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf(" %c%d%d%d",&ch,&x,&y,&w);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
5112 KB |
Output is correct |
| 2 |
Correct |
8 ms |
5240 KB |
Output is correct |
| 3 |
Correct |
8 ms |
5240 KB |
Output is correct |
| 4 |
Correct |
8 ms |
5240 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
352 ms |
31848 KB |
Output is correct |
| 2 |
Correct |
335 ms |
31848 KB |
Output is correct |
| 3 |
Correct |
337 ms |
32236 KB |
Output is correct |
| 4 |
Correct |
342 ms |
34836 KB |
Output is correct |
| 5 |
Correct |
346 ms |
32364 KB |
Output is correct |
| 6 |
Correct |
350 ms |
32728 KB |
Output is correct |
| 7 |
Correct |
334 ms |
31976 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
273 ms |
26004 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
5112 KB |
Output is correct |
| 2 |
Correct |
8 ms |
5240 KB |
Output is correct |
| 3 |
Correct |
8 ms |
5240 KB |
Output is correct |
| 4 |
Correct |
8 ms |
5240 KB |
Output is correct |
| 5 |
Correct |
352 ms |
31848 KB |
Output is correct |
| 6 |
Correct |
335 ms |
31848 KB |
Output is correct |
| 7 |
Correct |
337 ms |
32236 KB |
Output is correct |
| 8 |
Correct |
342 ms |
34836 KB |
Output is correct |
| 9 |
Correct |
346 ms |
32364 KB |
Output is correct |
| 10 |
Correct |
350 ms |
32728 KB |
Output is correct |
| 11 |
Correct |
334 ms |
31976 KB |
Output is correct |
| 12 |
Incorrect |
273 ms |
26004 KB |
Output isn't correct |
| 13 |
Halted |
0 ms |
0 KB |
- |
