제출 #59262

#제출 시각아이디문제언어결과실행 시간메모리
59262TadijaSebez친구 (IOI14_friend)C++11
100 / 100
129 ms11972 KiB
#include <stdio.h> #include <vector> using namespace std; #define mp make_pair #define pb push_back const int N=100050; int p[N],q[N],c[N]; vector<pair<int,int> > E[N]; void AddEdge(int u, int v, int w){ E[u].pb(mp(v,w));} int max(int a, int b){ return a>b?a:b;} int max(int a, int b, int c){ return max(a,max(b,c));} void DFS(int u) { p[u]=c[u];q[u]=0; for(int i=0;i<E[u].size();i++) { int v=E[u][i].first; int w=E[u][i].second; DFS(v); if(w==0) { q[u]+=max(q[v],p[v]); p[u]+=q[v]; } if(w==1) { p[u]=max(p[u]+p[v],p[u]+q[v],p[v]+q[u]); q[u]+=q[v]; } if(w==2) { p[u]=max(p[u]+q[v],p[v]+q[u]); q[u]+=q[v]; } //printf("%i %i %i:%i %i\n",u-1,v-1,w,p[u],q[u]); } } int findSample(int n, int co[], int par[], int ty[]) { int i; for(i=n-1;i;i--) AddEdge(par[i]+1,i+1,ty[i]); //for(i=1;i<n;i++) if(ty[i]==2) AddEdge(par[i]+1,i+1,ty[i]); //for(i=1;i<n;i++) if(ty[i]==1) AddEdge(par[i]+1,i+1,ty[i]); //for(i=1;i<n;i++) if(ty[i]==0) AddEdge(par[i]+1,i+1,ty[i]); for(i=1;i<=n;i++) c[i]=co[i-1]; DFS(1); return max(p[1],q[1]); }

컴파일 시 표준 에러 (stderr) 메시지

friend.cpp: In function 'void DFS(int)':
friend.cpp:15:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<E[u].size();i++)
              ~^~~~~~~~~~~~
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