Cod sursa(job #2485036)

Utilizator copanelTudor Roman copanel Data 31 octombrie 2019 21:39:17
Problema Cerere Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.94 kb
#include <fstream>
#include <cstdio>
#include <vector>
#include <cctype>

int sol[100001], destepti[100001];
std::vector<int> edges[100001];
bool viz[100001], are_parinte[100001];
int st[100000], top;

// fmm limite idioate
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;
    }
};

void dfs(int i) {
	viz[i] = true;
	st[top++] = i;
	if (destepti[i] > 0) {
		sol[i] = sol[st[top - destepti[i] - 1]] + 1;
	}
	for (const auto fiu : edges[i]) {
		dfs(fiu);
	}
	top--;
}

int main() {
	InParser fin("cerere.in");
	std::ofstream fout("cerere.out");
	int n;

	fin >> n;
	for (int i = 1; i <= n; i++) {
		fin >> destepti[i];
	}
	for (int i = 0; i < n - 1; i++) {
		int a, b;
		fin >> a >> b;
		edges[a].push_back(b);
		are_parinte[b] = true;
	}

	int tati = 1;
	while (tati <= n && are_parinte[tati] == true) {
		tati++;
	}
	dfs(tati);
	for (int i = 1; i <= n; i++) {
		fout << sol[i] << ' ';
	}

	return 0;
}