Submission #439305

#TimeUsernameProblemLanguageResultExecution timeMemory
439305algorithm16Keys (IOI21_keys)C++17
9 / 100
2576 ms44128 KiB
#include<iostream> #include<vector> #include<set> #include<algorithm> using namespace std; int cnt[200005],bio[200005],bio2[200005],n,m; set <pair<int,int> > s; set <int> s1[200005],s2; vector <int> r; vector <pair<int,int> > v[200005]; void f(int p) { for(int i=0;i<n;i++) { bio[i]=0; bio2[i]=0; s1[i].clear(); } bio[p]=1; bio2[r[p]]=1; s.clear(); s2.clear(); s.insert(make_pair(0,p)); while(!s.empty()) { int a=(*s.begin()).first,x=(*s.begin()).second; if(a) break; s.erase(s.begin()); s2.insert(x); //cout << a << " " << x << "\n"; //system("pause"); bio[x]=1; bio2[r[x]]=1; for(set <int>::iterator it=s1[r[x]].begin();it!=s1[r[x]].end();it++) { if(s.find(make_pair(1,(*it)))!=s.end()) s.erase(make_pair(1,(*it))); s.insert(make_pair(0,(*it))); } s1[r[x]].clear(); for(int i=0;i<v[x].size();i++) { if(bio[v[x][i].first]) continue; //bio[v[x][i].first]=1; s.insert(make_pair(!bio2[v[x][i].second],v[x][i].first)); if(!bio2[v[x][i].second]) s1[v[x][i].second].insert(v[x][i].first); } for(int i=0;i<v[x].size();i++) { if(bio[v[x][i].first]) continue; bio[v[x][i].first]=1; } } //cout << "\n\n"; } std::vector<int> find_reachable(std::vector<int> r1, std::vector<int> u1, std::vector<int> v1, std::vector<int> c1) { n=r1.size(); m=u1.size(); std::vector<int> ans(n); r=r1; int mini=1e9; for(int i=0;i<m;i++) { v[u1[i]].push_back(make_pair(v1[i],c1[i])); v[v1[i]].push_back(make_pair(u1[i],c1[i])); } for(int i=0;i<n;i++) { f(i); cnt[i]=s2.size(); mini=min(mini,cnt[i]); } for(int i=0;i<n;i++) { ans[i]=(cnt[i]==mini); } return ans; }

Compilation message (stderr)

keys.cpp: In function 'void f(int)':
keys.cpp:36:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |   for(int i=0;i<v[x].size();i++) {
      |               ~^~~~~~~~~~~~
keys.cpp:42:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |   for(int i=0;i<v[x].size();i++) {
      |               ~^~~~~~~~~~~~
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