Pagini recente » Monitorul de evaluare | Cod sursa (job #969710) | Cod sursa (job #1388944) | Cod sursa (job #1848134) | Cod sursa (job #2384474)
#include <bits/stdc++.h>
#define ff first
#define ss second
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pi;
const ll INF = 9223372036854775807ll;
const int inf = 2147483647, B = 100, nmax = 100005, VMAX = 1000001;
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;
}
};
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 == -1){
write_ch('-');
write_ch('1');
} else if (vu32 <= 9) {
write_ch(vu32 + '0');
} else {
(*this) << (vu32 / 10);
write_ch(vu32 % 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;
}
};
int n, test, e[nmax], first[nmax], last[nmax], p, add[nmax], v[nmax];
vector<int> g[nmax];
bitset<VMAX> ok[nmax/B+5];
void dfs(int x, int pred = 0)
{
e[++p] = x;
first[x] = p;
for (auto y : g[x])
if(y != pred)
dfs(y, x);
last[x] = p;
}
void resetBucket(int a)
{
for (int i = max((a/B)*B, 1); i/B == a/B && i <= n; ++i)
ok[a/B][v[i]] = 0;
for (int i = max((a/B)*B, 1); i/B == a/B && i <= n; ++i){
v[i] += add[a/B];
ok[a/B][v[i]] = 1;
}
add[a/B] = 0;
}
int main()
{
InParser fin ("arbore.in");
OutParser fout ("arbore.out");
fin >> n >> test;
for (int i = 1; i < n; ++i){
int x, y;
fin >> x >> y;
g[x].push_back(y);
g[y].push_back(x);
}
dfs(1);
e[0] = e[1];
while(test--){
int t;
fin >> t;
if(t == 1){
int nod, val;
fin >> nod >> val;
int a = first[nod], b = last[nod];
if(a == 1)
a = 0;
if(a/B == b/B){
if(b-a+1 == B)
add[a/B] += val;
else{
for (int i = a; i <= b; ++i){
ok[a/B][v[i]] = 0;
v[i] += val;
}
resetBucket(a);
}
}else{
if(a != 0 && a/B == (a-1)/B){
for (int i = a; i/B == a/B && i <= n; ++i){
ok[a/B][v[i]] = 0;
v[i] += val;
}
resetBucket(a);
a = ((a+B)/B)*B;
}
if(b != n && b/B == (b+1)/B){
for (int i = b; i/B == b/B && i >= 1; --i){
ok[b/B][v[i]] = 0;
v[i] += val;
}
resetBucket(b);
b = (b/B)*B;
}else b = ((b+B)/B)*B;
while(a != b){
add[a/B] += val;
a += B;
}
}
}else{
int val, ans = -1;
fin >> val;
for (int b = 0; b*B <= n; ++b)
if(val-add[b] >= 0 && ok[b][val-add[b]]){
for (int i = max(b*B, 1); i/B == b && i <= n; ++i)
if(v[i]+add[b] == val){
ans = e[i];
break;
}
break;
}
fout << ans << "\n";
}
}
return 0;
}