제출 #636367

#제출 시각아이디문제언어결과실행 시간메모리
636367Ez0zIOVgTsSgT바이오칩 (IZhO12_biochips)C++14
80 / 100
306 ms405224 KiB
#include<bits/stdc++.h> using namespace std; void DBG() { cerr << "]\n"; } template<class H, class... T> void DBG(H h, T... t) { cerr << h; if(sizeof...(t)) cerr << ", "; DBG(t...); } #ifdef LOCAL #define dbg(...) cerr << "[" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__) #else #define dbg(...) 0 #endif // LOCAL #define FOR(i,a,b) for(int i = (a) ; i<(b) ; i++) #define F0R(i,a) FOR(i,0,a) #define ROF(i,a,b) for(int i = (b)-1 ; i>=(a) ; i--) #define R0F(i,a) ROF(i,0,a) #define each(e,a) for(auto &e : (a)) #define sz(v) (int)(v).size() #define all(v) (v).begin(),(v).end() #define rall(v) (v).rbegin(),(v).rend() #define pb push_back #define tcT template<class T #define nl "\n" using ll = long long; using vi = vector<int>; using pi = pair<int,int>; using str = string; tcT> using V = vector<T>; tcT> using pqg = priority_queue<T,vector<T>,greater<T>>; void setIO(string NAME = "") { cin.tie(0)->sync_with_stdio(0); if(sz(NAME)) { freopen((NAME + ".inp").c_str(),"r",stdin); freopen((NAME + ".out").c_str(),"w",stdout); } } tcT> bool ckmin(T&a, const T&b) { return b < a ? a=b,1 : 0; } tcT> bool ckmax(T&a, const T&b) { return b > a ? a=b,1 : 0; } const int MOD = 1e9 + 7; const int MX = 2e5+5; int N, M, par[MX], val[MX], rt, tin[MX], tout[MX], dp[MX][505], nodat[MX], tt; vi adj[MX]; void dfs(int u) { nodat[tin[u] = ++tt] = u; each(v, adj[u]) { dfs(v); } tout[u] = tt; } void solve() { cin >> N >> M; FOR(i,1,N+1) { cin >> par[i] >> val[i]; if(!par[i]) rt = i; else adj[par[i]].pb(i); } dfs(rt); memset(dp, -0x3f, sizeof dp); FOR(i,1,tt+1) dp[i][0] = 0; ROF(i,1,tt+1) { int u = nodat[i]; int r = min(tout[u]+1, tt+1); F0R(j, M+1) { ckmax(dp[i][j], dp[i+1][j]); if(j>0) ckmax(dp[i][j], dp[r][j-1] + val[u]); } } // int ans = 0; // FOR(i,1,tt+1) ckmax(ans, dp[i][M]); // cout << ans << nl; cout << max(0, dp[1][M]) << nl; } int main() { setIO(); int t=1; //cin>>t; while(t-->0) { solve(); } return 0; }

컴파일 시 표준 에러 (stderr) 메시지

biochips.cpp: In function 'void setIO(std::string)':
biochips.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen((NAME + ".inp").c_str(),"r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
biochips.cpp:38:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         freopen((NAME + ".out").c_str(),"w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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