Submission #1119361

#	Time	Username	Problem	Language	Result	Execution time	Memory
1119361		yeediot	Magic Tree (CEOI19_magictree)	C++17	3 / 100	132 ms	35908 KiB

magictree

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define pii pair<int,int>
#define pb push_back
#define sz(x) (int)(x.size())
#define chmin(x,y) x=min(x,y)
#define chmax(x,y) x=max(x,y)
#define vi vector<int>
#define vp vector<pii>
#define vvi vector<vi>
#define ykh mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count())
#define __lg(x) 63-__builtin_clzll(x)
#define pow2(x) (1LL<<x)
void __print(int x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
 
template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifdef local
void CHECK();
void setio(){
    freopen("/Users/iantsai/cpp/input.txt","r",stdin);
    freopen("/Users/iantsai/cpp/output.txt","w",stdout);
}
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
void setio(){}
#define debug(x...)
#endif
#define TOI_is_so_de ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);setio();
const int mxn = 1e5 + 5;
vector<int>adj[mxn];
int n, m, k, d[mxn], w[mxn], ans = 0;
vector<vector<int>>dp;
map<int, int>mp[mxn];
void dfs(int v, int pa){
    for(auto u : adj[v]){
        if(u == pa) continue;
        dfs(u, v);
        /*for(int i = 0; i <= k; i++){
            dp[v][i] += dp[u][i];
            chmax(ans, dp[v][i]);
        }*/
        if(sz(mp[v]) < sz(mp[u])){
            swap(mp[v], mp[u]);
        }
        for(auto x : mp[u]){
            mp[v][x.F] += x.S;
        }
    }
    /*cout << v << ' ';
    for(int i = 0; i <= k; i++){
        cout << dp[v][i] << ' ';
    }
    cout << '\n';*/
    int cur = 0;
    if(w[v] == 0) return;
    auto it = mp[v].lower_bound(d[v]);
    for(; it != mp[v].end() and cur <= w[v];){
        cur += it->S;
        if(cur <= w[v])it = mp[v].erase(it);
        else{
            it->S -= w[v];
        }
    }
    mp[v][d[v]] += w[v];
    // for(int i = 0; i <= k; i++){
    //     cur = max(cur, dp[v][i]);
    //     if(i == d[v]) cur = max(cur, dp[v][i] + w[v]);
    //     dp[v][i] = cur;
    // }
}
void solve(){
    cin >> n >> m >> k;
    for(int i = 2; i <= n; i++){
        int p;
        cin >> p;
        adj[p].pb(i);
    }
    for(int i = 1; i <= m; i++){
        int a, b, c;
        cin >> a >> b >> c;
        d[a] = b;
        w[a] = c;
    }
    dfs(1, 1);
    ans = 0;
    for(auto x : mp[1]){
        ans += x.S;
    }
    cout << ans << '\n';
}
signed main(){
    TOI_is_so_de;
    int t = 1;
    //cin >> t;
    while(t--){
        solve();
    }
    #ifdef local
    CHECK();
    #endif
}
/*
input:
 
*/
#ifdef local
void CHECK(){
    cerr << "\n[Time]: " << 1000.0 * clock() / CLOCKS_PER_SEC << " ms.\n";
    function<bool(string,string)> compareFiles = [](string p1, string p2)->bool {
        std::ifstream file1(p1);
        std::ifstream file2(p2);
        if(!file1.is_open() || !file2.is_open()) return false;
        std::string line1, line2;
        while (getline(file1, line1) && getline(file2, line2)) {
            if (line1 != line2)return false;
        }
        int cnta = 0, cntb = 0;
        while(getline(file1,line1))cnta++;
        while(getline(file2,line2))cntb++;
        return cntb - cnta <= 1;
    };
    bool check = compareFiles("output.txt","expected.txt");
    if(check) cerr<<"ACCEPTED\n";
    else cerr<<"WRONG ANSWER!\n";
}
#else
#endif

• Subtask 1: 0 / 6
• Subtask 2: 3 / 3
• Subtask 3: 0 / 11
• Subtask 4: 0 / 12
• Subtask 5: 0 / 16
• Subtask 6: 0 / 13
• Subtask 7: 0 / 22
• Subtask 8: 0 / 17