Pagini recente » Cod sursa (job #2781661) | Cod sursa (job #2743935) | Cod sursa (job #2486686) | Cod sursa (job #548208) | Cod sursa (job #1631985)
#include <iostream>
#include <cstdio>
#include <vector>
#define MAXN 100050
using namespace std;
vector<int> graf[MAXN];
int parent[MAXN], n, m;
int val[MAXN];
void citire()
{
scanf("%d %d", &n, &m);
for (int i = 1; i <= n-1; i++) {
int x, y;
scanf("%d %d", &x, &y);
graf[x].push_back(y);
graf[y].push_back(x);
}
}
void dfs(int nod = 1)
{
for (const auto& y : graf[nod])
if (!parent[y])
parent[y] = nod, dfs(y);
}
void update(int x, int sum)
{
val[x] += sum;
}
int get(int sum, int nod = 1, int crt = 0)
{
crt += val[nod];
if (crt == sum)
return nod;
for (const auto& y : graf[nod])
if (y != parent[nod]) {
int x = get(sum, y, crt);
if (x != -1) return x;
}
return -1;
}
int main()
{
freopen("arbore.in", "r", stdin);
freopen("arbore.out", "w", stdout);
citire();
parent[1] = 1;
dfs();
for (int i = 1; i <= m; i++) {
int tip, x, y;
scanf("%d ", &tip);
if (tip == 1) {
scanf("%d %d", &x, &y);
update(x, y);
}
else {
scanf("%d", &x);
printf("%d\n", get(x));
}
}
return 0;
}