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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#125580 | #6531. Base Station Construction | zyoobn | WA | 104ms | 17240kb | C++20 | 2.4kb | 2023-07-16 22:20:32 | 2023-07-16 22:20:36 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
struct SegTree {
struct Node {
int l, r;
i64 val, lazy;
};
int n;
vector<Node> tr;
SegTree() {}
template <class T>
SegTree(vector<T> &a) {
init(a);
}
template <class T>
void init(vector<T> &a) {
n = a.size();
tr.resize(n * 4);
function<void(int, int, int)> build = [&] (int k, int l, int r) {
tr[k] = {l, r};
if (l == r) {
tr[k].val = a[l - 1]; // 赋值要注意数组a下标从0开始用l - 1,从1开始用l
return;
}
int mid = (l + r) / 2;
build(k * 2, l, mid);
build(k * 2 + 1, mid + 1, r);
pushup(k);
};
build(1, 1, n);
}
void pushup(int k) {
int ls = k * 2, rs = k * 2 + 1;
tr[k].val = min(tr[ls].val, tr[rs].val);
}
template<class Num>
void update(int x, int y, Num v, int k = 1) {
int l = tr[k].l, r = tr[k].r;
if(x <= l && r <= y) {
tr[k].val += v;
tr[k].lazy += v;
return;
}
int mid = (l + r) >> 1;
if (x <= mid && y > mid) {
update(x, y, v, k * 2);
update(x, y, v, k * 2 + 1);
} else if (x <= mid) {
update(x, y, v, k * 2);
} else if (y > mid) {
update(x, y, v, k * 2 + 1);
}
pushup(k);
}
Node query(int x, int y, int k = 1) {
int l = tr[k].l, r = tr[k].r;
if(x <= l && r <= y) {
return tr[k];
}
int mid = (l + r) >> 1;
Node res;
if (x <= mid && y > mid) {
Node L = query(x, y, k * 2);
Node R = query(x, y, k * 2 + 1);
res.val = min(L.val, R.val);
} else if (x <= mid) {
res = query(x, y, k * 2);
} else if (y > mid) {
res = query(x, y, k * 2 + 1);
}
return res;
}
};
void solve() {
int n;
cin >> n;
vector<int> a(n);
for (int i = 0; i < n; ++i) {
cin >> a[i];
}
int m;
cin >> m;
vector<vector<int>> g(n);
for (int i = 0; i < m; ++i) {
int l, r;
cin >> l >> r;
--l, --r;
g[r].push_back(l);
}
vector<i64> dp(n);
SegTree tr(dp);
priority_queue<int> q;
for (int i = 0; i < n; ++i) {
if (!q.empty()) {
dp[i] = tr.query(q.top() + 1, i - 1 + 1).val + a[i];
} else {
dp[i] = a[i];
}
tr.update(i + 1, i + 1, dp[i]);
// cout << dp[i] << " \n"[i == n - 1];
for (auto &l : g[i]) {
q.push(l);
}
}
cout << dp[n - 1] << '\n';
}
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int t = 1;
cin >> t;
while(t--) {
solve();
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3404kb
input:
2 5 3 2 4 1 100 3 1 3 2 4 5 5 5 7 3 4 2 2 3 1 4 2 3 4 5
output:
102 5
result:
ok 2 number(s): "102 5"
Test #2:
score: -100
Wrong Answer
time: 104ms
memory: 17240kb
input:
6201 12 88 78 46 95 84 98 55 3 68 42 6 18 19 6 9 10 11 12 12 8 11 8 12 2 3 2 3 1 5 9 9 7 8 6 11 2 4 12 12 2 4 2 9 7 10 8 8 1 7 6 11 5 76 27 48 66 61 2 1 4 3 5 8 64 81 20 6 86 9 4 55 1 7 7 9 1 43 18 81 11 22 9 61 83 14 5 6 2 6 5 8 1 4 9 9 9 9 7 7 2 5 8 9 5 6 4 8 5 8 9 9 6 6 10 66 41 84 7 80 31 22 96 ...
output:
141 88 59 126 303 141 45 170 159 139 222 194 217 147 230 93 287 89 124 130 148 125 100 193 228 111 239 303 236 150 177 57 59 38 90 128 83 160 108 62 35 122 156 81 115 229 110 242 126 28 210 86 311 244 262 162 302 177 93 238 30 129 75 109 96 179 81 224 142 172 119 111 215 247 301 121 120 56 213 118 3...
result:
wrong answer 2nd numbers differ - expected: '48', found: '88'