제출 #430692

#제출 시각아이디문제언어결과실행 시간메모리
430692frodakcin친구 (IOI14_friend)C++17
100 / 100
33 ms3396 KiB
#include "friend.h" #include <vector> #include <array> #include <algorithm> template<typename T> bool ckmax(T& a, const T& b) {return b>a?a=b,1:0;} template<typename T> bool ckmin(T& a, const T& b) {return b<a?a=b,1:0;} // Find out best sample int findSample(int n,int confidence[],int host[],int protocol[]) { std::vector<std::array<int, 2> > dp(n); //0) I am not used //1) I am used for(int i=0;i<n;++i) dp[i]={0, confidence[i]}; for(int i=n-1;i>0;--i) { int h = host[i]; if(protocol[i] == 0) { dp[h][0] += std::max(dp[i][0], dp[i][1]); dp[h][1] += dp[i][0]; } else if(protocol[i] == 1) { dp[h][1] += std::max(dp[i][0], dp[i][1]); ckmax(dp[h][1], dp[h][0]+dp[i][1]); dp[h][0] += dp[i][0]; } else if(protocol[i] == 2) { dp[h][1] += dp[i][0]; ckmax(dp[h][1], dp[h][0]+dp[i][1]); dp[h][0] += dp[i][0]; } } return std::max(dp[0][0], dp[0][1]); }
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