Submission #543028

#TimeUsernameProblemLanguageResultExecution timeMemory
543028__VariattoBitaro’s Party (JOI18_bitaro)C++17
7 / 100
2049 ms10792 KiB
#include <bits/stdc++.h> using namespace std; #define pb push_back #define fi first #define se second #define ll long long const int MAX=1e5+10, S=350;///////////// int n, m, q, a, b, y, t; int c[MAX], ile[MAX], maxi[MAX]; vector<int>g[MAX], top, g2[MAX]; bool zly[MAX]; void topo(){ for(int i=1; i<=n; i++) if(!ile[i]) top.pb(i); for(int i=0; i<top.size(); i++){ int v=top[i]; for(auto s:g[v]){ ile[s]--; if(!ile[s]) top.pb(s); } } } void duzo(){ for(auto a: top){ if(zly[a]) maxi[a]=-1; else maxi[a]=0; for(auto s:g2[a]) if(maxi[s]!=-1) maxi[a]=max(maxi[s]+1, maxi[a]); if(a==t) break; } cout<<maxi[t]<<"\n"; } vector<pair<int,int>>all[MAX]; void malo(){ for(auto [f,s]: all[t]){ if(!zly[s]){ cout<<f<<"\n"; return; } } cout<<-1<<"\n"; } int licznik[MAX]; bool bylo[MAX]; int main(){ ios_base::sync_with_stdio(false); cin.tie(0), cout.tie(0); cin>>n>>m>>q; for(int i=1; i<=m; i++){ cin>>a>>b; g[a].pb(b), g2[b].pb(a); ile[b]++; } topo(); for(auto a:top){ for(auto s:g2[a]) licznik[s]=0; for(int i=0; i<=S; i++){ pair<int,int>maxi={0,0}; for(auto s:g2[a]) if(licznik[s]<all[s].size()) maxi=max(maxi, {all[s][licznik[s]].fi, s}); if(maxi.se==0) break; if(bylo[all[maxi.se][licznik[maxi.se]].se]) i--; else{ all[a].pb({all[maxi.se][licznik[maxi.se]].fi+1, all[maxi.se][licznik[maxi.se]].se}); bylo[all[maxi.se][licznik[maxi.se]].se]=true; } licznik[maxi.se]++; } for(auto x: all[a]) bylo[x.se]=false; all[a].pb({0, a}); } while(q--){ cin>>t>>y; for(int i=1; i<=y; i++){ cin>>c[i]; zly[c[i]]=true; } if(y>S) duzo(); else malo(); for(int i=1; i<=y; i++) zly[c[i]]=false; } }

Compilation message (stderr)

bitaro.cpp: In function 'void topo()':
bitaro.cpp:16:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for(int i=0; i<top.size(); i++){
      |                  ~^~~~~~~~~~~
bitaro.cpp: In function 'int main()':
bitaro.cpp:63:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |                 if(licznik[s]<all[s].size())
      |                    ~~~~~~~~~~^~~~~~~~~~~~~~
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