Submission #295575

#TimeUsernameProblemLanguageResultExecution timeMemory
295575stoyan_malininFriend (IOI14_friend)C++14
11 / 100
51 ms6392 KiB
#include "friend.h" //#include "grader.cpp" #include <vector> #include <iostream> using namespace std; const int MAXN = 1005; int n; vector <int> graph[MAXN]; void constructGrahp(int n, int confidence[], int host[], int protocol[]) { for(int x = 1;x<=n;x++) { if(protocol[x]==0) { graph[ host[x] ].push_back(x); graph[x].push_back(host[x]); } else if(protocol[x]==1) { for(int y: graph[ host[x] ]) { graph[y].push_back(x); graph[x].push_back(y); } } else if(protocol[x]==2) { graph[x].push_back(host[x]); graph[ host[x] ].push_back(x); for(int y: graph[ host[x] ]) { graph[y].push_back(x); graph[x].push_back(y); } } } } namespace Subtask1 { bool can(int x, int mask) { for(int y: graph[x]) { if(((mask>>y)&1)==1) return false; } return true; } int rec(int x, int mask, int confidence[]) { if(x==n) return 0; int answer = rec(x+1, mask, confidence); if(can(x, mask)==true) answer = max(answer, confidence[x]+rec(x+1, (mask|(1<<x)), confidence)); return answer; } int solve(int n, int confidence[], int host[], int protocol[]) { return rec(0, 0, confidence); } }; int guessSubtask() { if(n<=10) return 1; return -1; } int findSample(int _n,int confidence[],int host[],int protocol[]) { n = _n; constructGrahp(n, confidence, host, protocol); if(guessSubtask()==1) return Subtask1::solve(n, confidence, host, protocol); return 0; }
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