#include<bits/stdc++.h>
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#define ll long long
#define vi vector<int>
#define pii pair<int,int>
#define all(x) x.begin(),x.end()
#define fi first
#define se second
#define pb push_back
using namespace std;
const int N = 1e6+6,inf = 1e8;
int F[N],ANS[N];
vector<pii> Q[N*4];
void qer(int v,int tl,int tr,int l,int r,int QL,int QR) {
if (l > tr || r < tl) return;
if (l <= tl && r >= tr) {
Q[v].pb({QL,QR});
return;
}
int tm = (tl + tr)/2;
qer(v*2,tl,tm,l,r,QL,QR);
qer(v*2+1,tm+1,tr,l,r,QL,QR);
}
int cans=INT_MAX;
int t[2][4*N],timer;
int *H[61000000];
int val[61000000];
void change(int&x,int c) {
H[++timer] = &x;
val[timer] = x;
x = c;
}
void rollback() {
(*H[timer]) = val[timer--];
}
bool type;
int VAL,pos,L,R;
void add(int v=1,int tl=1,int tr=1e6) {
if (tl == tr) {
if (!type)
change(t[0][v],min(t[0][v],VAL));
else change(t[1][v],max(t[1][v],VAL));
return;
}
int tm = (tl + tr)/2;
if (pos <= tm)
add(v*2,tl,tm);
else add(v*2+1,tm+1,tr);
if (!type)
change(t[0][v],min(t[0][v*2],t[0][v*2+1]));
else
change(t[1][v],max(t[1][v*2],t[1][v*2+1]));
}
int get(int v=1,int tl=1,int tr=1e6) {
if (L> tr || R < tl) {
if (type == 0) return inf;
else return -inf;
}
if (L <= tl && R >= tr) return t[type][v];
int tm = (tl + tr)/2;
if (!type)
return min(get(v*2,tl,tm),get(v*2+1,tm+1,tr));
else return max(get(v*2,tl,tm),get(v*2+1,tm+1,tr));
}
int L1=-inf,R1=inf,AR1[N],AL1[N],HANS=inf;
void dfs(int v,int tl,int tr) {
int in_ans = cans;
int start_time = timer;
for (auto& i1 : Q[v]) {
int l = i1.fi;
int r = i1.se;
change(R1,min(R1,r));
change(L1,max(L1,l));
change(AR1[l],min(AR1[l],r));
change(AL1[r],max(AL1[r],l));
{
int l2 = L1;
int r2 = R1;
int len = max(0,r2 - l2);
if (len) {
int r3 = AR1[l2];
int l3 = AL1[r2];
change(HANS,r3-l3);
pos = l;
VAL = r;
type = 0;
add(); // l-ze patara r-ebshi udidesi l, r-ze did l-ebshi umciresi r
pos = r;
VAL = l;
type = 1;
add();
continue;
}
}
L = r;
R = 1e6;
type = 0;
if (cans > r - l)
cans = min(cans, -l + get());
L = 1;
R = l;type = 1;
if (cans > r - l)
cans = min(cans, r - get());
pos = l;
VAL = r;
type = 0;
add(); // l-ze patara r-ebshi udidesi l, r-ze did l-ebshi umciresi r
pos = r;
VAL = l;
type = 1;
add();
}
if (tl != tr) {
int tm = (tl + tr)/2;
dfs(v*2,tl,tm);
dfs(v*2+1,tm+1,tr);
}else {
if (cans > 1000000)
ANS[tl] = HANS;
else
ANS[tl] = cans;
}
}
while(start_time != timer)
rollback();
cans = in_ans;
}
main() {
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int q;
cin >> q;
for (int i = 0; i < N; i++)
AR1[i] = inf,AL1[i] = -inf;
for (int i = 0; i < 4*N;i ++)
t[0][i] = inf, t[1][i] = -inf;
vector<pair<pii,char> > query(q+1);
vector<pii> t(q);
for (int i = 1; i <= q; i++) {
char c;
int l,r;
cin >> c >> l >> r;
query[i] = {{l,r},c};
t[i-1] = {l,r};
}
sort(all(t));
t.resize(unique(all(t)) - t.begin());
map<pii,int> ID;
for (int i = 0; i < t.size(); i++) {
ID[t[i]] = i;
}
set<int> cnt[1000005];
for (int i = 1; i <= q; i++) {
char c= query[i].se;
int l = query[i].fi.fi;
int r = query[i].fi.se;
int id = ID[{l,r}];
if (c == 'A')
cnt[id].insert(i);
else {
qer(1,1,q,*cnt[id].begin(),i-1,l,r);
cnt[id].erase(cnt[id].begin());
}
F[i] = 1;
}
for (int i= 0; i < t.size(); i++)
for (int j : cnt[i])
qer(1,1,q,j,q,t[i].fi,t[i].se);
dfs(1,1,q);
for (int i = 1; i <= q; i++)
cout << ANS[i] <<' ';
}
Compilation message
Main.cpp: In function 'void rollback()':
Main.cpp:37:28: warning: operation on 'timer' may be undefined [-Wsequence-point]
37 | (*H[timer]) = val[timer--];
| ~~~~~^~
Main.cpp:37:28: warning: operation on 'timer' may be undefined [-Wsequence-point]
Main.cpp: In function 'void dfs(int, int, int)':
Main.cpp:74:9: warning: unused variable 'in_ans' [-Wunused-variable]
74 | int in_ans = cans;
| ^~~~~~
Main.cpp:75:9: warning: unused variable 'start_time' [-Wunused-variable]
75 | int start_time = timer;
| ^~~~~~~~~~
Main.cpp: At global scope:
Main.cpp:131:5: error: expected unqualified-id before 'while'
131 | while(start_time != timer)
| ^~~~~
Main.cpp:133:5: error: 'cans' does not name a type
133 | cans = in_ans;
| ^~~~
Main.cpp:134:1: error: expected declaration before '}' token
134 | }
| ^
Main.cpp:135:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
135 | main() {
| ^
Main.cpp: In function 'int main()':
Main.cpp:157:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
157 | for (int i = 0; i < t.size(); i++) {
| ~~^~~~~~~~~~
Main.cpp:174:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
174 | for (int i= 0; i < t.size(); i++)
| ~~^~~~~~~~~~
