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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#588045 | #7105. Pixel Art | Tomorrow | AC ✓ | 390ms | 16644kb | C++17 | 2.5kb | 2024-09-24 23:55:05 | 2024-09-24 23:55:05 |
Judging History
answer
#include <bits/stdc++.h>
#define MAXN ((int) 1e5)
#define MAXK ((int) 1e5)
using namespace std;
typedef pair<int, int> pii;
int n, K, ans1, ans2;
int R1[MAXK + 10], C1[MAXK + 10], R2[MAXK + 10], C2[MAXK + 10];
// add[i]:第 i 行要加入哪些矩形
// del[i]:第 i 列要删除哪些矩形
vector<int> add[MAXK + 10], del[MAXK + 10];
int root[MAXK + 10];
// 求并查集的根
int findroot(int x) {
if (root[x] != x) root[x] = findroot(root[x]);
return root[x];
}
// 合并集合 x 和 y
void merge(int x, int y) {
x = findroot(x); y = findroot(y);
if (x == y) return;
root[x] = y;
ans2--;
}
void solve() {
scanf("%d%*d%d", &n, &K);
for (int i = 1; i <= n + 1; i++) add[i].clear(), del[i].clear();
for (int i = 1; i <= K; i++) {
scanf("%d%d%d%d", &R1[i], &C1[i], &R2[i], &C2[i]);
add[R1[i]].push_back(i);
del[R2[i] + 1].push_back(i);
}
for (int i = 1; i <= K; i++) root[i] = i;
ans1 = ans2 = 0;
// cnt:当前行有几个黑色格子
int cnt = 0;
// map key 是区间,map value 是这个区间包含的列属于哪个连通块
map<pii, int> mp;
for (int i = 1; i <= n; i++) {
// 检查新加入的矩形和上方矩形的相邻情况
for (int idx : add[i]) {
auto it = mp.lower_bound(pii(C1[idx], 0));
if (it != mp.begin()) it = prev(it);
while (it != mp.end() && it->first.first <= C2[idx]) {
if (it->first.second >= C1[idx]) merge(it->second, idx);
it++;
}
}
// 删除在上一行结束的矩形
for (int idx : del[i]) {
cnt -= C2[idx] - C1[idx] + 1;
mp.erase(pii(C1[idx], C2[idx]));
}
// 加入新的矩形
for (int idx : add[i]) {
cnt += C2[idx] - C1[idx] + 1;
mp[pii(C1[idx], C2[idx])] = idx;
auto it = mp.find(pii(C1[idx], C2[idx]));
// 检查和左方矩形的相邻情况
if (it != mp.begin() && prev(it)->first.second == C1[idx] - 1) merge(prev(it)->second, idx);
// 检查和右方矩形的相邻情况
if (next(it) != mp.end() && next(it)->first.first == C2[idx] + 1) merge(next(it)->second, idx);
}
ans1 += cnt; ans2 += add[i].size();
printf("%d %d\n", ans1, ans2);
}
}
int main() {
int tcase; scanf("%d", &tcase);
while (tcase--) solve();
return 0;
}
这程序好像有点Bug,我给组数据试试?
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 8868kb
input:
3 2 5 2 1 1 1 2 2 3 2 5 2 5 2 1 1 1 3 2 3 2 5 3 3 3 1 1 1 2 3 1 3 2 1 3 2 3
output:
2 1 5 2 3 1 6 1 3 1 4 1 6 2
result:
ok 7 lines
Test #2:
score: 0
Accepted
time: 390ms
memory: 16644kb
input:
2130 2 5 2 1 1 1 2 2 3 2 5 2 5 2 1 1 1 3 2 3 2 5 3 3 3 1 1 1 2 3 1 3 2 1 3 2 3 3 100 51 1 2 2 2 1 4 2 4 1 6 2 6 1 8 2 8 1 10 2 10 1 12 2 12 1 14 2 14 1 16 2 16 1 18 2 18 1 20 2 20 1 22 2 22 1 24 2 24 1 26 2 26 1 28 2 28 1 30 2 30 1 32 2 32 1 34 2 34 1 36 2 36 1 38 2 38 1 40 2 40 1 42 2 42 1 44 2 44 ...
output:
2 1 5 2 3 1 6 1 3 1 4 1 6 2 50 50 100 50 200 1 50 50 150 1 200 1 2 1 4 1 6 1 8 1 10 1 12 1 14 1 16 1 18 1 20 1 22 1 24 1 26 1 28 1 30 1 32 1 34 1 36 1 38 1 40 1 42 1 44 1 46 1 48 1 50 1 52 1 54 1 56 1 58 1 60 1 62 1 64 1 66 1 68 1 70 1 72 1 74 1 76 1 78 1 80 1 82 1 84 1 86 1 88 1 90 1 92 1 94 1 96 1...
result:
ok 355756 lines
Extra Test:
score: 0
Extra Test Passed