結果
| 問題 |
No.772 Dynamic Distance Sum
|
| コンテスト | |
| ユーザー |
maroon_kuri
|
| 提出日時 | 2018-12-05 23:46:02 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
RE
|
| 実行時間 | - |
| コード長 | 3,612 bytes |
| コンパイル時間 | 2,056 ms |
| コンパイル使用メモリ | 207,000 KB |
| 最終ジャッジ日時 | 2025-01-06 18:22:03 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | RE * 2 MLE * 1 |
| other | AC * 1 RE * 18 MLE * 8 |
コンパイルメッセージ
main.cpp: In function ‘ll read()’:
main.cpp:58:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
58 | scanf("%" SCNd64,&i);
| ~~~~~^~~~~~~~~~~~~~~~
main.cpp: In function ‘std::string readString()’:
main.cpp:80:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
80 | scanf("%s",buf);
| ~~~~~^~~~~~~~~~
main.cpp: In function ‘char* readCharArray()’:
main.cpp:88:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
88 | scanf("%s",ret);
| ~~~~~^~~~~~~~~~
ソースコード
#include <bits/stdc++.h>
#include <type_traits>
using namespace std;
using ll=int64_t;
#define int ll
#define FOR(i,a,b) for(int i=int(a);i<int(b);i++)
#define REP(i,b) FOR(i,0,b)
#define MP make_pair
#define PB push_back
#define EB emplace_back
#define ALL(x) x.begin(),x.end()
auto& errStream=cerr;
#ifdef LOCAL
#define cerr (cerr<<"-- line "<<__LINE__<<" -- ")
#else
class CerrDummy{}cerrDummy;
template<class T>
CerrDummy& operator<<(CerrDummy&cd,const T&){
return cd;
}
using charTDummy=char;
using traitsDummy=char_traits<charTDummy>;
CerrDummy& operator<<(CerrDummy&cd,basic_ostream<charTDummy,traitsDummy>&(basic_ostream<charTDummy,traitsDummy>&)){
return cd;
}
#define cerr cerrDummy
#endif
#define REACH cerr<<"reached"<<endl
#define DMP(x) cerr<<#x<<":"<<x<<endl
#define ZERO(x) memset(x,0,sizeof(x))
#define ONE(x) memset(x,-1,sizeof(x))
using pi=pair<int,int>;
using vi=vector<int>;
using ld=long double;
template<class T,class U>
ostream& operator<<(ostream& os,const pair<T,U>& p){
os<<"("<<p.first<<","<<p.second<<")";
return os;
}
template<class T>
ostream& operator <<(ostream& os,const vector<T>& v){
os<<"{";
REP(i,(int)v.size()){
if(i)os<<",";
os<<v[i];
}
os<<"}";
return os;
}
ll read(){
ll i;
scanf("%" SCNd64,&i);
return i;
}
void printSpace(){
printf(" ");
}
void printEoln(){
printf("\n");
}
void print(ll x,int suc=1){
printf("%" PRId64,x);
if(suc==1)
printEoln();
if(suc==2)
printSpace();
}
string readString(){
static char buf[3341000];
scanf("%s",buf);
return string(buf);
}
char* readCharArray(){
static char buf[3341000];
static int bufUsed=0;
char* ret=buf+bufUsed;
scanf("%s",ret);
bufUsed+=strlen(ret)+1;
return ret;
}
template<class T,class U>
void chmax(T& a,U b){
if(a<b)
a=b;
}
template<class T,class U>
void chmin(T& a,U b){
if(b<a)
a=b;
}
template<class T>
T Sq(const T& t){
return t*t;
}
#define CAPITAL
void Yes(bool ex=true){
#ifdef CAPITAL
cout<<"YES"<<endl;
#else
cout<<"Yes"<<endl;
#endif
if(ex)exit(0);
}
void No(bool ex=true){
#ifdef CAPITAL
cout<<"NO"<<endl;
#else
cout<<"No"<<endl;
#endif
if(ex)exit(0);
}
const ll infLL=LLONG_MAX/3;
#ifdef int
const int inf=infLL;
#else
const int inf=INT_MAX/2-100;
#endif
struct Edge{
int to,cost;
};
const int Nmax=1010;
int x[Nmax];
vector<Edge> tr[Nmax];
int TreeSize(int v,int p){
int ret=x[v];
for(auto e:tr[v])if(e.to!=p)
ret+=TreeSize(e.to,v);
return ret;
}
int FindCentroid(int v,int p,int s,int&c){
int ret=x[v],mx=0;
for(auto e:tr[v])if(e.to!=p){
int f=FindCentroid(e.to,v,s,c);
if(f==-1)
return -1;
else{
ret+=f;
mx=max(mx,f);
}
}
mx=max(mx,s-ret);
if(mx*2<=s){
c=v;
return -1;
}else
return ret;
}
int dfs(int v,int p,int d){
int res=x[v]*d;
for(auto e:tr[v]){
if(e.to!=p){
res+=dfs(e.to,v,d+e.cost);
}
}
return res;
}
void Solve(int root){
int ts=TreeSize(root,-1);
if(ts==1){
print(0);
return;
}
FindCentroid(root,-1,ts,root);
print(dfs(root,-1,0));
}
signed main(){
int n=read(),q=read();
REP(i,n)
x[i]=1;
assert(n<=1000);
vector<tuple<int,int,int>> es;
REP(_,q){
int t=read();
if(t==1){
int a=read()-1,b=read()-1,c=read();
es.PB(make_tuple(a,b,c));
}else if(t==2){
int a=read()-1,b=read()-1;
auto itr=es.begin();
while(pi(get<0>(*itr),get<1>(*itr))!=pi(a,b))
itr++;
es.erase(itr);
}else if(t==3){
int root=read()-1;
x[root]^=1;
REP(i,n)
tr[i].clear();
for(auto e:es){
int a=get<0>(e),b=get<1>(e),c=get<2>(e);
tr[a].PB(Edge{b,c});
tr[b].PB(Edge{a,c});
}
Solve(root);
}else{
assert(false);
}
}
}
maroon_kuri