This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <iostream>
#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define debug(a) cout << #a << " = " << a << endl
#define debugsl(a) cout << #a << " = " << a << ", "
#define rep(i,a,b) for(int i = (a); i <= (b); i++)
#define repa(i,a,b) for(int i = (a); i >= (b); i--)
#define w first
#define u second.first
#define v second.second
#define LIM 1000000007
#define MAX 50000
lli n,m,q,a,b,c,r,l,x,y;
pair< lli, pair<lli,lli> > arr[MAX+2];
lli st[MAX*4],offset;
void update(lli pos, lli ini, lli fin, lli des, lli val) {
lli mitad;
if (ini > des || fin < des) return;
if (ini == fin && ini == des) {
st[pos] = val;
return;
}
mitad = (ini+fin)/2;
update(pos*2, ini, mitad, des, val);
update((pos*2)+1, mitad+1, fin, des, val);
st[pos] = min(st[pos*2], st[(pos*2)+1]);
}
lli query(lli pos, lli ini, lli fin, lli l, lli r) {
if (ini > r || fin < l) return LIM;
if (l <= ini && fin <= r) return st[pos];
lli mitad = (ini+fin)/2;
return min(query(pos*2, ini, mitad, l ,r),
query((pos*2)+1, mitad+1, fin, l, r) );
}
lli b1 (lli ini,lli fin, lli val) {
lli mitad,a;
lli star = ini;
lli ult = ini-1;
while (ini <= fin) {
mitad = (ini+fin)/2;
a = query(1,1,offset,star,mitad);
if (a <= val) {
ult = mitad;
ini = mitad+1;
}
else fin = mitad-1;
}
return ult;
}
lli b2 (lli ini,lli fin, lli val) {
lli mitad,a;
lli star = fin-1;
lli ult = fin;
while (ini <= fin) {
mitad = (ini+fin)/2;
a = query(1,1,offset,mitad,star);
if (a <= val) {
ult = mitad;
fin = mitad-1;
}
else ini = mitad+1;
}
return ult;
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin >> n >> m;
offset -1;
while (offset < n) offset *= 2;
rep(i,1,m) {
cin >> a >> b >> c;
arr[i] = {c, {a,b} };
st[offset+a-1] = c;
}
rep(i,offset+n, (offset*2)-1) st[i] = LIM;
repa(i,offset-1,1) st[i] = min(st[i*2], st[(i*2)+1]);
cin >> q;
rep(Q, 1, q) {
cin >> a >> b >> c;
if (a == 1) {
//actualiza
x = arr[b].u;
y = c;
update(1,1,offset,x,y);
}
else {
r = b1(b,n,c);
r++;
l = b2(1,b,c);
a = r-l+1;
cout << a << "\n";
}
}
}
Compilation message (stderr)
bridges.cpp: In function 'int main()':
bridges.cpp:88:12: warning: statement has no effect [-Wunused-value]
88 | offset -1;
| ~~~~~~~^~
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