# | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
57254 | 2018-07-14T11:14:41 Z | Plurm | Beads and wires (APIO14_beads) | C++11 | 6 ms | 4992 KB |
#include <bits/stdc++.h> #define eb emplace_back using namespace std; typedef long long ll; const int MXN = 2e5+5; vector<pair<int,int> > g[MXN]; ll dp[MXN][2]; void dfs(int c,int p = -1){ ll s = 0ll; for(int i = 0; i < g[c].size(); i++){ pair<int,int> x = g[c][i]; if(x.first == p) continue; dfs(x.first,c); s += max(dp[x.first][0],dp[x.first][1] + (ll)x.second); } ll m = s; for(int i = 0; i < g[c].size(); i++){ if(g[c][i].first == p) continue; for(int j = i+1; j < g[c].size(); j++){ if(g[c][j].first == p) continue; m = max(m,s - max(dp[g[c][i].first][0],dp[g[c][i].first][1] + (ll)g[c][i].second) - max(dp[g[c][j].first][0],dp[g[c][j].first][1] + (ll)g[c][j].second) + dp[g[c][i].first][0] + g[c][i].second + dp[g[c][j].first][0] + g[c][j].second ); } } dp[c][0] = m; m = -1e16; for(int i = 0; i < g[c].size(); i++){ if(g[c][i].first == p) continue; m = max(m,s + dp[g[c][i].first][0] + (ll)g[c][i].second - max(dp[g[c][i].first][0],dp[g[c][i].first][1] + (ll)g[c][i].second)); } dp[c][1] = m; } int main(){ #ifdef REDIRECT_IO freopen("input.txt","r",stdin); freopen("output.txt","w",stdout); #endif int n; scanf("%d",&n); if(n > 1000) throw 0; int a,b,c; for(int i = 1; i < n; i++){ scanf("%d%d%d",&a,&b,&c); g[a].eb(b,c); g[b].eb(a,c); } dfs(1); printf("%lld",dp[1][0]); }
Compilation message
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 6 ms | 4992 KB | Output is correct |
2 | Correct | 6 ms | 4992 KB | Output is correct |
3 | Correct | 6 ms | 4992 KB | Output is correct |
4 | Correct | 6 ms | 4992 KB | Output is correct |
5 | Correct | 6 ms | 4992 KB | Output is correct |
6 | Incorrect | 5 ms | 4992 KB | Output isn't correct |
7 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 6 ms | 4992 KB | Output is correct |
2 | Correct | 6 ms | 4992 KB | Output is correct |
3 | Correct | 6 ms | 4992 KB | Output is correct |
4 | Correct | 6 ms | 4992 KB | Output is correct |
5 | Correct | 6 ms | 4992 KB | Output is correct |
6 | Incorrect | 5 ms | 4992 KB | Output isn't correct |
7 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 6 ms | 4992 KB | Output is correct |
2 | Correct | 6 ms | 4992 KB | Output is correct |
3 | Correct | 6 ms | 4992 KB | Output is correct |
4 | Correct | 6 ms | 4992 KB | Output is correct |
5 | Correct | 6 ms | 4992 KB | Output is correct |
6 | Incorrect | 5 ms | 4992 KB | Output isn't correct |
7 | Halted | 0 ms | 0 KB | - |
# | Verdict | Execution time | Memory | Grader output |
---|---|---|---|---|
1 | Correct | 6 ms | 4992 KB | Output is correct |
2 | Correct | 6 ms | 4992 KB | Output is correct |
3 | Correct | 6 ms | 4992 KB | Output is correct |
4 | Correct | 6 ms | 4992 KB | Output is correct |
5 | Correct | 6 ms | 4992 KB | Output is correct |
6 | Incorrect | 5 ms | 4992 KB | Output isn't correct |
7 | Halted | 0 ms | 0 KB | - |