Cod sursa(job #2792512)

Utilizator mihneadv@yahoo.comDavid Mihnea Stefan [email protected] Data 1 noiembrie 2021 19:59:47
Problema Cerere Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 3.28 kb
#include<fstream>
#include<vector>

using namespace std;
class InParser {
private:
    FILE *fin;
    char *buff;
    int sp;

    char read_ch() {
        ++sp;
        if (sp == 4096) {
            sp = 0;
            fread(buff, 1, 4096, fin);
        }
        return buff[sp];
    }

public:
    InParser(const char* nume) {
        fin = fopen(nume, "r");
        buff = new char[4096]();
        sp = 4095;
    }

    InParser& operator >> (int &n) {
        char c;
        while (!isdigit(c = read_ch()) && c != '-');
        int sgn = 1;
        if (c == '-') {
            n = 0;
            sgn = -1;
        } else {
            n = c - '0';
        }
        while (isdigit(c = read_ch())) {
            n = 10 * n + c - '0';
        }
        n *= sgn;
        return *this;
    }

    InParser& operator >> (long long &n) {
        char c;
        n = 0;
        while (!isdigit(c = read_ch()) && c != '-');
        long long sgn = 1;
        if (c == '-') {
            n = 0;
            sgn = -1;
        } else {
            n = c - '0';
        }
        while (isdigit(c = read_ch())) {
            n = 10 * n + c - '0';
        }
        n *= sgn;
        return *this;
    }
};

class OutParser {
private:
    FILE *fout;
    char *buff;
    int sp;

    void write_ch(char ch) {
        if (sp == 50000) {
            fwrite(buff, 1, 50000, fout);
            sp = 0;
            buff[sp++] = ch;
        } else {
            buff[sp++] = ch;
        }
    }


public:
    OutParser(const char* name) {
        fout = fopen(name, "w");
        buff = new char[50000]();
        sp = 0;
    }
    ~OutParser() {
        fwrite(buff, 1, sp, fout);
        fclose(fout);
    }

    OutParser& operator << (int vu32) {
        if (vu32 <= 9) {
            write_ch(vu32 + '0');
        } else {
            (*this) << (vu32 / 10);
            write_ch(vu32 % 10 + '0');
        }
        return *this;
    }

    OutParser& operator << (long long vu64) {
        if (vu64 <= 9) {
            write_ch(vu64 + '0');
        } else {
            (*this) << (vu64 / 10);
            write_ch(vu64 % 10 + '0');
        }
        return *this;
    }

    OutParser& operator << (char ch) {
        write_ch(ch);
        return *this;
    }
    OutParser& operator << (const char *ch) {
        while (*ch) {
            write_ch(*ch);
            ++ch;
        }
        return *this;
    }
};

InParser cin("cerere.in");
OutParser cout("cerere.out");

int X;
vector<int>v[100000];
vector<int>dist;
vector<int>sol;
int Q[100000];

void DFS(int nod, int ind)
{
    Q[ind] = nod;
    sol[nod] = sol[Q[ind - dist[nod]]] + 1;
    for(int i = 0; i < v[nod].size(); i++)
    {
        DFS(v[nod][i],ind + 1);
    }
}

int main()
{
    cin >> X;
    dist.resize(X);
    sol.resize(X);
    int ind = false;
    for(int i = 0; i < X; i++)
    {
        cin >> dist[i];
        ind = (ind ^ i);
    }
    for(int i = 0; i < X - 1; i++)
    {
        int V1, V2;
        cin >> V1 >> V2;
        V1--, V2--;
        v[V1].push_back(V2);
        ind = ind ^ V2;
    }
    DFS(ind, false);
    for(int i = 0; i < X; i++)
    {
        cout << sol[i] - 1 << ' ';
    }
    return false;
}