#include <iostream> #include <vector> #include <memory.h> using namespace std; const int N = (int)2e5 + 7; const int M = (int)500 + 7; int n, m; int pr[N], w[N]; vector < int > gr[N]; vector < int > order; int tiktak; int tin[N], tout[N]; int dp[N][M]; void dfs(int v) { if (gr[v].empty()) tiktak++; tin[v] = tiktak; for (int to : gr[v]) { dfs(to); } order.push_back(v); tout[v] = tiktak; } main() { ios::sync_with_stdio(0); cin.tie(0); cout.tie(0); cin >> n >> m; for (int i = 1; i <= n; i++) { cin >> pr[i] >> w[i]; gr[pr[i]].push_back(i); } dfs(gr[0][0]); for (int i = 0; i < n; i++) { int v = order[i]; int l = tin[v]; int r = tout[v]; for (int j = 0; j <= m; j++) { dp[r][j] = max(dp[r][j], dp[r - 1][j]); } for (int j = 1; j <= min(l, m); j++) { dp[r][j] = max(dp[r][j], dp[l - 1][j - 1] + w[v]); } } int res = 0; for (int i = 1; i <= tiktak; i++) { res = max(res, dp[i][m]); } cout << res; }

biochips.cpp:28:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^