| # | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 82808 | 2018-11-01T20:26:46 Z | farukkastamonuda | Inspection (POI11_ins) | C++14 | 2109 ms | 132096 KB |
#include <cstdio>
#include <vector>
#include <queue>
#include <cassert>
typedef long long LL;
const int MAXN = 1000123;
const int NOANS = -1;
int deg[MAXN];
std::vector<int> v[MAXN];
int n;
bool used[MAXN];
int myDeg[MAXN], father[MAXN], sizeOfSubtree[MAXN], depth[MAXN], maxSubtree[MAXN];
LL cost[MAXN];
void dfs(int x) {
used[x] = true;
for(size_t i = 0; i < v[x].size(); i ++) if (!used[v[x][i]]) {
father[v[x][i]] = x;
dfs(v[x][i]);
}
}
std::vector<int> getCands(int root) {
std::vector<int> cands;
for(int i = 0; i < n; i ++) {
myDeg[i] = deg[i];
used[i] = false;
father[i] = - 1;
sizeOfSubtree[i] = 1;
maxSubtree[i] = 0;
}
dfs(root);
std::queue<int> q;
for(int i = 0; i < n; i ++) if (myDeg[i] == 1) {
q.push(i);
}
while (! q.empty()) {
int wz1 = q.front(); q.pop();
myDeg[father[wz1]] --;
if (std::max(n - sizeOfSubtree[wz1], maxSubtree[wz1]) <= n / 2) {
cands.push_back(wz1);
}
sizeOfSubtree[father[wz1]] += sizeOfSubtree[wz1];
maxSubtree[father[wz1]] = std::max(maxSubtree[father[wz1]], sizeOfSubtree[wz1]);
if (myDeg[father[wz1]] == 1 && father[wz1] != - 1) {
q.push(father[wz1]);
}
}
return cands;
}
LL anal(int root) {
// liczymy odpowiedz dla root'a max. poddrzewo == n / 2
for(int i = 0; i < n; i ++) {
myDeg[i] = deg[i];
used[i] = false;
father[i] = - 1;
sizeOfSubtree[i] = 1;
cost[i] = 0;
depth[i] = 0;
}
dfs(root);
std::queue<int> q;
for(int i = 0; i < n; i++) if (myDeg[i] == 1) {
q.push(i);
}
while (! q.empty()) {
int wz1 = q.front(); q.pop();
myDeg[father[wz1]] --;
sizeOfSubtree[father[wz1]] += sizeOfSubtree[wz1];
cost[father[wz1]] += (2L * sizeOfSubtree[wz1] + cost[wz1]);
depth[father[wz1]] = std::max(depth[father[wz1]], depth[wz1] + 1);
if (myDeg[father[wz1]] == 1 && father[wz1] != - 1) {
q.push(father[wz1]);
}
}
int maxDepth = 0;
for(size_t i = 0; i < v[root].size(); i ++) {
maxDepth = std::max(maxDepth, depth[v[root][i]]);
}
for(size_t i = 0; i < v[root].size(); i ++) {
if (sizeOfSubtree[v[root][i]] == n / 2) {
maxDepth = depth[v[root][i]];
}
}
return cost[root] - (maxDepth + 1);
}
int main() {
int a, b;
scanf("%d", &n);
if (n == 1) {
printf("0\n");
return 0;
}
for(int i = 0; i < n - 1; i ++) {
scanf("%d %d", &a, &b);
a --; b --;
v[a].push_back(b);
v[b].push_back(a);
deg[a] ++;
deg[b] ++;
}
std::vector<int> getCandidates = getCands(n - 1);
if (getCandidates.size() == 1) {
int a = getCandidates[0];
for(int i = 0; i < a; i++) {
printf("%d\n", NOANS);
}
printf("%lld\n", anal(a));
for(int i = a + 1; i < n; i++) {
printf("%d\n", NOANS);
}
} else if (getCandidates.size() == 2) {
int a = getCandidates[0], b = getCandidates[1];
if (a > b) std::swap(a, b);
for(int i = 0; i < a; i++) {
printf("%d\n", NOANS);
}
printf("%lld\n", anal(a));
for(int i = a + 1; i < b; i++) {
printf("%d\n", NOANS);
}
printf("%lld\n", anal(b));
for(int i = b + 1; i < n; i++) {
printf("%d\n", NOANS);
}
} else {
assert(false);
}
return 0;
}
Compilation message
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 23 ms | 23928 KB | Output is correct |
| 2 | Correct | 22 ms | 24060 KB | Output is correct |
| 3 | Correct | 22 ms | 24060 KB | Output is correct |
| 4 | Correct | 22 ms | 24060 KB | Output is correct |
| 5 | Correct | 22 ms | 24060 KB | Output is correct |
| 6 | Correct | 22 ms | 24084 KB | Output is correct |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 22 ms | 24084 KB | Output is correct |
| 2 | Correct | 23 ms | 24084 KB | Output is correct |
| 3 | Correct | 22 ms | 24084 KB | Output is correct |
| 4 | Correct | 22 ms | 24084 KB | Output is correct |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 25 ms | 24116 KB | Output is correct |
| 2 | Correct | 24 ms | 24248 KB | Output is correct |
| 3 | Correct | 24 ms | 24336 KB | Output is correct |
| 4 | Correct | 23 ms | 24356 KB | Output is correct |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 41 ms | 25564 KB | Output is correct |
| 2 | Correct | 37 ms | 25948 KB | Output is correct |
| 3 | Correct | 37 ms | 26420 KB | Output is correct |
| 4 | Correct | 35 ms | 26420 KB | Output is correct |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 58 ms | 27776 KB | Output is correct |
| 2 | Correct | 53 ms | 28388 KB | Output is correct |
| 3 | Correct | 54 ms | 29120 KB | Output is correct |
| 4 | Correct | 49 ms | 29120 KB | Output is correct |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 105 ms | 33096 KB | Output is correct |
| 2 | Correct | 114 ms | 35044 KB | Output is correct |
| 3 | Correct | 124 ms | 37036 KB | Output is correct |
| 4 | Correct | 92 ms | 37036 KB | Output is correct |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 732 ms | 64604 KB | Output is correct |
| 2 | Correct | 714 ms | 69536 KB | Output is correct |
| 3 | Correct | 728 ms | 73016 KB | Output is correct |
| 4 | Correct | 603 ms | 73016 KB | Output is correct |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 2083 ms | 99944 KB | Output is correct |
| 2 | Correct | 1874 ms | 106836 KB | Output is correct |
| 3 | Correct | 1959 ms | 127284 KB | Output is correct |
| 4 | Correct | 1751 ms | 127284 KB | Output is correct |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Correct | 2109 ms | 127284 KB | Output is correct |
| 2 | Runtime error | 1923 ms | 132096 KB | Memory limit exceeded: We have a known bug that the memory usage is measured incorrectly (possibly because of Meltdown/Spectre patch), so your solution may be correct. Please submit again. Sorry for the inconvenience. |
| 3 | Halted | 0 ms | 0 KB | - |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Runtime error | 2106 ms | 132096 KB | Memory limit exceeded: We have a known bug that the memory usage is measured incorrectly (possibly because of Meltdown/Spectre patch), so your solution may be correct. Please submit again. Sorry for the inconvenience. |
| 2 | Halted | 0 ms | 0 KB | - |