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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#302378 | #7615. Sequence Folding | defyers# | WA | 0ms | 7692kb | C++20 | 2.4kb | 2024-01-10 20:09:41 | 2024-01-10 20:09:42 |
Judging History
answer
#include "bits/stdc++.h"
using namespace std;
#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")
#define int long long
using ll = long long;
using LL = long long;
using pii = pair<int, int>;
const int N = 5e5 + 11;
const int INF = 1LL << 60;
int a[N];
int n, q;
struct SegTree{
int t[N << 2], ans = 0;
void build(int v, int l, int r){
if(l == r){
t[v] = a[v]; ans += t[v];
}else{
int m = (l + r) / 2;
build(v * 2 + 1, l, m);
build(v * 2 + 2, m + 1, r);
int P = 0, Q = 0;
int mx = 0;
for(int i = m; i >= l; i--){
mx = max(mx, a[i]);
P += mx;
}
mx = 0;
for(int i = m + 1; i <= r; i++){
mx = max(mx, a[i]);
Q += mx;
}
ans += P * Q;
t[v] = max(t[v * 2 + 1], t[v * 2 + 2]);
}
}
void _add(int qi, int qv, int v, int l, int r){
if(l == r) t[v] += qv;
else {
int m = (l + r) / 2;
if(qi <= m) _add(qi, qv, v * 2 + 1, l, m);
else _add(qi, qv, v * 2 + 2, m + 1, r);
t[v] = max(t[v * 2 + 1], t[v * 2 + 2]);
}
}
int larger_first(int ql, int qr, int qv, int v, int l, int r){
if(qr < ql || qr < l || r < ql || t[v] <= qv) return INF;
if(l == r) return l;
else {
int m = (l + r) / 2;
int a = larger_first(ql, qr, qv, v * 2 + 1, l, m);
if(a != INF) return a;
int b = larger_first(ql, qr, qv, v * 2 + 2, m + 1, r);
return b;
}
}
int larger_last(int ql, int qr, int qv, int v, int l, int r){
if(qr < ql || qr < l || r < ql || t[v] <= qv) return INF;
if(l == r) return l;
else {
int m = (l + r) / 2;
int a = larger_last(ql, qr, qv, v * 2 + 2, m + 1, r);
if(a != INF) return a;
int b = larger_last(ql, qr, qv, v * 2 + 1, l, m);
return b;
}
}
void add(int x){
_add(x, 1, 0, 1, n);
}
void sub(int x){
_add(x, -1, 0, 1, n);
}
} ST_MAX, ST_MIN;
void add(int x){
ST_MAX.add(x);
ST_MIN.sub(x);
}
void sub(int x){
ST_MAX.sub(x);
ST_MIN.add(x);
}
void solve(int TC) {
cin >> n >> q;
for(int i = 1; i <= n; i++) cin >> a[i];
ST_MAX.build(0, 1, n);
for(int i = 1; i <= n; i++) a[i] = -a[i];
ST_MIN.build(0, 1, n);
for(int i = 0; i < q; i++){
char op; cin >> op;
int x; cin >> x;
if(op == '+') add(x);
else sub(x);
cout << ST_MAX.ans + ST_MIN.ans << '\n';
}
}
int32_t main() {
cin.tie(0)->sync_with_stdio(0);
cout << fixed << setprecision(10);
int t = 1;
cin >> t;
for (int i = 1; i <= t; i++) {
solve(i);
}
}
Details
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Test #1:
score: 0
Wrong Answer
time: 0ms
memory: 7692kb
input:
8 3 1 5 8
output:
40 80 120 160 200 240 280 320
result:
wrong answer 1st lines differ - expected: '2', found: '40'