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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#395712 | #7067. The Great Wall | suibian_xiaozhao# | WA | 1ms | 3900kb | C++23 | 3.2kb | 2024-04-21 17:37:13 | 2024-04-21 17:37:13 |
Judging History
answer
#include "bits/stdc++.h"
using namespace std;
#define endl "\n"
#define debug(x) cerr <<#x<<" "<<x<<endl;
using ll = long long;
//#define int ll
struct node {
int len;
vector<int> arr;
vector<int> premin, premax, sufmin, sufmax;
node(int n) : len(n), arr(n + 1), premax(n + 1), premin(n + 1), sufmax(n + 1), sufmin(n + 1) {
}
};
pair<int, int> check(node n) {
int maxs = -1e9 - 100;
int len = 0;
if (n.len == 1) {
return make_pair(maxs, 0);
}
int lens = n.len;
int valueall = n.premax[lens] - n.premin[lens];
for (int i = 1; i < lens; i++) {
int left = n.premax[i] - n.premin[i];
int right = n.sufmax[i + 1] - n.sufmin[i + 1];
if (left + right - valueall > maxs) {
maxs = left + right - valueall;
len = i;
}
}
return make_pair(maxs, len);
};
node getnode(vector<int> &v) {
int len = v.size();
len--;
node n(len);
for (int i = 1; i <= len; i++) {
n.arr[i] = v[i];
}
for (int i = 1; i <= len; i++) {
if (i == 1) {
n.premax[1] = n.premin[1] = v[1];
} else {
n.premax[i] = max(n.premax[i - 1], v[i]);
n.premin[i] = min(n.premin[i - 1], v[i]);
}
}
for (int i = len; i; i--) {
if (i == len) {
n.sufmax[i] = n.sufmin[i] = v[i];
} else {
n.sufmax[i] = max(n.sufmax[i + 1], v[i]);
n.sufmin[i] = min(n.sufmin[i + 1], v[i]);
}
}
return n;
}
pair<node, node> spilt(int i, node &n) {
vector<int> l, r;
vector<int> v = n.arr;
l.emplace_back(0);
r.emplace_back(0);
for (int j = 1; j <= i; j++) {
l.emplace_back(v[j]);
}
for (int j = i + 1; j < v.size(); j++) {
r.emplace_back(v[j]);
}
node ll = getnode(l), rr = getnode(r);
return make_pair(ll, rr);
}
void getvalue(vector<node> &v) {
int sums = 0;
for (auto i: v) {
int len = i.len;
sums += i.premax[len] - i.premin[len];
}
cout << sums << endl;
}
// 5
// 1 2 3 4 5
signed main() {
ios::sync_with_stdio(0), cin.tie(0);
int n;
cin >> n;
vector<int> arr(n + 1);
for (int i = 1; i <= n; i++)cin >> arr[i];
vector<node> v;
node nn = getnode(arr);
v.emplace_back(nn);
for (int i = 1; i < n; i++) {
getvalue(v);
// debug(i);
int maxs = -1e9 - 100;
int len1 = 0;
int len2 = 0;
for (int j = 0; j < v.size(); j++) {
// debug(j);
auto [kk, kkk] = check(v[j]);
if (kk > maxs) {
maxs = kk;
len1 = j;
len2 = kkk;
}
}
// debug(i);
vector<node> mir;
for (int j = 0; j < len1; j++) {
mir.emplace_back(v[j]);
}
// debug(i);
auto [l, r] = spilt(len2, v[len1]);
mir.emplace_back(l);
mir.emplace_back(r);
for (int j = len1 + 1; j < v.size(); j++) {
mir.emplace_back(v[j]);
}
v = mir;
// debug(i);
}
getvalue(v);
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3900kb
input:
5 1 2 3 4 5
output:
4 3 2 1 0
result:
ok 5 lines
Test #2:
score: 0
Accepted
time: 0ms
memory: 3592kb
input:
5 1 2 1 2 1
output:
1 2 2 1 0
result:
ok 5 lines
Test #3:
score: 0
Accepted
time: 0ms
memory: 3596kb
input:
6 1 1 4 5 1 4
output:
4 7 7 7 4 0
result:
ok 6 lines
Test #4:
score: 0
Accepted
time: 0ms
memory: 3668kb
input:
6 1 9 1 9 8 1
output:
8 16 23 16 8 0
result:
ok 6 lines
Test #5:
score: -100
Wrong Answer
time: 1ms
memory: 3872kb
input:
12 1 1 4 5 1 4 1 9 1 9 8 1
output:
8 16 23 27 30 30 29 26 23 16 8 0
result:
wrong answer 7th lines differ - expected: '30', found: '29'