Submission #258044

#TimeUsernameProblemLanguageResultExecution timeMemory
258044uacoder123Dostavljač (COCI18_dostavljac)C++14
140 / 140
969 ms2512 KiB
#include <bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> using namespace std; using namespace __gnu_pbds; #define F first #define S second #define FOR(i,a,b) for (auto i = (a); i <= (b); ++i) #define NFOR(i,a,b) for(auto i = (a); i >= (b); --i) #define all(x) (x).begin(), (x).end() #define sz(x) int(x.size()) #define mp(i,a) make_pair(i,a) #define pb(a) push_back(a) typedef long long int lli; typedef pair <int, int> ii; typedef vector <int> vi; int n,m; vi al[501]; int dp[501][501][2],val[501]; void dfs(int node,int p) { for(int i=0;i<al[node].size();++i) if(al[node][i]!=p) dfs(al[node][i],node); dp[node][0][0]=0; dp[node][0][1]=0; for(int i=1;i<=m;++i) { dp[node][i][0]=val[node]; dp[node][i][1]=val[node]; } for(int i=0;i<al[node].size();++i) { for(int j=m;j>=1;--j) { for(int k=j;k>=0;--k) { if(j-2>=k) { dp[node][j][0]=max(dp[node][j][0],dp[al[node][i]][k][0]+dp[node][j-2-k][0]); dp[node][j][1]=max(dp[node][j][1],dp[node][j-2-k][1]+dp[al[node][i]][k][0]); } if(j-1>=k) { dp[node][j][1]=max(dp[node][j][1],dp[al[node][i]][k][1]+dp[node][j-1-k][0]); } } } } } int main() { cin>>n>>m; for(int i=1;i<=n;++i) cin>>val[i]; for(int i=0;i<n-1;++i) { int f,s; cin>>f>>s; al[f].pb(s); al[s].pb(f); } dfs(1,1); cout<<dp[1][m][1]<<endl; return 0; }

Compilation message (stderr)

dostavljac.cpp: In function 'void dfs(int, int)':
dostavljac.cpp:22:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<al[node].size();++i)
               ~^~~~~~~~~~~~~~~~
dostavljac.cpp:32:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<al[node].size();++i)
               ~^~~~~~~~~~~~~~~~
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