제출 #1017480

#제출 시각아이디문제언어결과실행 시간메모리
1017480vivkostov친구 (IOI14_friend)C++14
46 / 100
27 ms15216 KiB
#include<bits/stdc++.h> #define endl '\n' #include "friend.h" using namespace std; void speed() { ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); } int n,a,b,br[1500][1500],mas[1500],otg,con[1500],ho[1500],pr[1500],s,ma,dpin[1500],dpout[1500],used[1500]; vector<int>v[1500]; void check() { int seg=0; for(int i=0;i<n;i++) { if(!mas[i])continue; for(int j=i+1;j<n;j++) { if(!mas[j])continue; if(br[i][j])return; } seg+=con[i]; } otg=max(otg,seg); } void rec(int step) { if(step==n) { check(); return; } for(int i=0;i<=1;i++) { mas[step]=i; rec(step+1); } } void make_dp(int beg,int par) { used[beg]=1; int w; int sout=0,sin=0; for(int i=0;i<v[beg].size();i++) { w=v[beg][i]; if(w==par)continue; if(!used[w])make_dp(w,beg); sin+=max(dpin[w],dpout[w]); sout+=dpout[w]; } dpin[beg]=sout+con[beg]; dpout[beg]=sin; } int findSample(int N, int confidence[], int host[], int protocol[]) { n=N; int br0=0,br1=0,br2=0,h; for(int i=1;i<n;i++) { h=host[i]; if(protocol[i]==0) { br0++; br[h][i]=1; br[i][h]=1; v[h].push_back(i); v[i].push_back(h); } if(protocol[i]==1) { br1++; for(int j=0;j<n;j++) { br[i][j]=br[h][j]; br[j][i]=br[j][h]; if(br[h][j])v[i].push_back(j); if(br[j][h])v[j].push_back(i); } } if(protocol[i]==2) { br2++; for(int j=0;j<n;j++) { br[i][j]=br[h][j]; br[j][i]=br[j][h]; if(br[h][j])v[i].push_back(j); if(br[j][h])v[j].push_back(i); } br[h][i]=1; br[i][h]=1; v[h].push_back(i); v[i].push_back(h); } } for(int i=0;i<n;i++) { con[i]=confidence[i]; s+=con[i]; ma=max(con[i],ma); } if(br1==n-1)return s; if(br2==n-1)return ma; if(n<=10) { rec(0); return otg; } else { make_dp(0,0); return max(dpin[0],dpout[0]); } } void read() { cin>>n; for(int i=1;i<n;i++) { cin>>ho[i]>>pr[i]; if(pr[i]==0) { br[ho[i]][i]=1; br[i][ho[i]]=1; } if(pr[i]==1) { for(int j=0;j<n;j++) { br[i][j]=br[ho[i]][j]; br[j][i]=br[j][ho[i]]; } } if(pr[i]==2) { for(int j=0;j<n;j++) { br[i][j]=br[ho[i]][j]; br[j][i]=br[j][ho[i]]; } br[ho[i]][i]=1; br[i][ho[i]]=1; } } for(int i=0;i<n;i++) { for(int j=0;j<n;j++) { //cout<<br[i][j]<<" "; } //cout<<endl; } for(int i=0;i<n;i++) { cin>>con[i]; } rec(0); cout<<otg<<endl; } /*int main() { speed(); read(); return 0; } */

컴파일 시 표준 에러 (stderr) 메시지

friend.cpp: In function 'void make_dp(int, int)':
friend.cpp:46:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |     for(int i=0;i<v[beg].size();i++)
      |                 ~^~~~~~~~~~~~~~
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