제출 #1010331

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1010331		AdamGS	Worst Reporter 4 (JOI21_worst_reporter4)	C++17	100 / 100	217 ms	58688 KiB

worst_reporter2

#include<bits/stdc++.h>
using namespace std;
typedef long double ld;
typedef long long ll;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
const int LIM=2e5+7;
vector<int>V[LIM];
ll A[LIM], T[LIM], C[LIM], odw[LIM], cykl[LIM], root[LIM], ile[LIM];
void DFS(int x) {
  ile[x]=1;
  for(auto i : V[x]) {
    DFS(i);
    ile[x]+=ile[i];
  }
  rep(i, V[x].size()) if(ile[V[x][i]]>ile[V[x][0]]) swap(V[x][i], V[x][0]);
}
void DFS2(int x, multiset<pair<ll,ll>>&S) {
  if(V[x].size()) DFS2(V[x][0], S);
  for(int i=1; i<V[x].size(); ++i) {
    multiset<pair<ll,ll>>P;
    DFS2(V[x][i], P);
    for(auto j : P) S.insert(j);
  }
  ll a=C[x];
  while(a) {
    auto it=S.lower_bound({T[x], -1});
    if(it==S.begin()) break;
    --it;
    auto p=*it;
    S.erase(S.find(p));
    if(p.nd<=a) {
      a-=p.nd;
      continue;
    }
    p.nd-=a;
    a=0;
    S.insert(p);
  }
  S.insert({T[x], C[x]});
}
int main() {
  ios_base::sync_with_stdio(0); cin.tie(0);
  int n;
  cin >> n;
  rep(i, n) {
    cin >> A[i] >> T[i] >> C[i];
    --A[i];
  }
  rep(i, n) if(!odw[i]) {
    int p=i;
    while(!odw[p]) {
      odw[p]=i+1;
      p=A[p];
    }
    if(odw[p]!=i+1) continue;
    int x=A[p];
    vector<pair<ll,ll>>P;
    while(x!=p) {
      P.pb({T[x], C[x]});
      cykl[x]=1;
      root[x]=p;
      x=A[x];
    }
    P.pb({T[x], C[x]});
    cykl[x]=1;
    root[x]=p;
    sort(all(P));
    x=p;
    for(auto j : P) {
      T[x]=j.st;
      C[x]=j.nd;
      if(A[x]==p) A[x]=x;
      x=A[x];
    }
  }
  rep(i, n) if(!cykl[i] && cykl[A[i]]) A[i]=root[A[i]];
  rep(i, n) if(A[i]!=i) V[A[i]].pb(i);
  ll sum=0;
  rep(i, n) sum+=C[i];
  rep(i, n) if(A[i]==i) {
    DFS(i);
    multiset<pair<ll,ll>>S;
    DFS2(i, S);
    for(auto j : S) sum-=j.nd;
  }
  cout << sum << '\n';
}

컴파일 시 표준 에러 (stderr) 메시지

worst_reporter2.cpp: In function 'void DFS(int)':
worst_reporter2.cpp:5:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    5 | #define rep(a, b) for(int a = 0; a < (b); ++a)
      |                                    ^
worst_reporter2.cpp:19:3: note: in expansion of macro 'rep'
   19 |   rep(i, V[x].size()) if(ile[V[x][i]]>ile[V[x][0]]) swap(V[x][i], V[x][0]);
      |   ^~~
worst_reporter2.cpp: In function 'void DFS2(int, std::multiset<std::pair<long long int, long long int> >&)':
worst_reporter2.cpp:23:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |   for(int i=1; i<V[x].size(); ++i) {
      |                ~^~~~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 65 / 65
• Subtask 3: 21 / 21