結果
問題 | No.772 Dynamic Distance Sum |
ユーザー |
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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); } } }