| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 919381 |
2024-01-31T17:05:05 Z |
phong |
Swap (BOI16_swap) |
C++17 |
|
5 ms |
14680 KB |
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma")
#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
#define ll long long
const int nmax = 2e5 + 5;
const ll oo = 1e18, base = 311;
const int lg = 38, M =2e2 + 5;
const ll mod = 1e9 + 7;
#define pii pair<ll, int>
#define fi first
#define se second
#define debug(a, n) for(int i = 1; i <= n; ++i) cout << a[i] << ' ';
using namespace std;
int n, d[nmax];
vector<int> adj[nmax], tmp;
vector<vector<int>> dp[nmax];
void get(vector<int> &a, vector<int> &b, vector<int> &c){
for(int i = 1, j = 1, l = 1, pos; i <= b.size() || j <= c.size(); i += l, j += l, l <<= 1){
for(pos = i; pos <= b.size() && pos <= i + l - 1; ++pos) a.push_back(b[pos - 1]);
for(pos = j; pos <= c.size() && pos <= j + l - 1; ++pos) a.push_back(c[pos - 1]);
}
}
void calc(int x, vector<int> &b, vector<int> &c){
tmp ={x};
get(tmp, b, c);
}
void ckmin(vector<int> &a, vector<int> &b){
if(a.empty()) a = b;
else{
for(int i = 0; i < a.size(); ++i){
int u = a[i], v = b[i];
if(d[u] > d[v]){
a = b;
return;
}
if(d[u] < d[v]) return;
}
}
}
vector<int> gg;
int L[nmax], R[nmax];
bool f[lg + 1][nmax];
void update(int u){
dp[u].resize(adj[u].size());
if(u * 2 > n){
for(int i = 0; i < adj[u].size(); ++i){
dp[u][i].push_back(adj[u][i]);
}
}
else{
if(u * 2 + 1 > n){
for(int i = 0; i < adj[u << 1].size(); ++i) L[adj[u << 1][i]] = i;
for(int j = 0; j < adj[u].size(); ++j){
if(!f[j][u]) continue;
int x = adj[u][j];
int rs = min(d[x], d[u << 1]);
if(rs == d[x]){
calc(x, dp[u << 1][L[u << 1]], gg);
ckmin(dp[u][j], tmp);
}
else {
calc(u << 1,dp[u << 1][L[x]], gg);
ckmin(dp[u][j], tmp);
}
}
dp[u << 1].clear();
adj[u << 1].clear();
}
else{
for(int i = 0; i < adj[u << 1].size(); ++i) L[adj[u << 1][i]] = i;
for(int i = 0; i < adj[u << 1 | 1].size(); ++i) R[adj[u << 1 | 1][i]] = i;
for(int j = 0; j < adj[u].size(); ++j){
if(!f[j][u]) continue;
int x = adj[u][j];
int rs = min({d[x], d[u << 1], d[u << 1 | 1]});
if(rs == d[x]){
calc(x, dp[u << 1][L[u * 2]], dp[u << 1 | 1][R[u << 1 | 1]]);
ckmin(dp[u][j], tmp);
}
else if(rs == d[u << 1]){
calc(u << 1, dp[u << 1][L[x]], dp[u << 1 | 1][R[u << 1 | 1]]);
ckmin(dp[u][j], tmp);
}
else{
calc(u << 1 | 1, dp[u << 1][L[x]], dp[u << 1 | 1][R[u * 2]]);
ckmin(dp[u][j], tmp);
calc(u << 1 | 1, dp[u << 1][L[u * 2]], dp[u << 1 | 1][R[x]]);
ckmin(dp[u][j], tmp);
}
// cout << u << ' ' << x << " # ";
// for(auto p : dp[u][j]) cout << p << ' ';
// cout << "\n";
}
dp[u << 1].clear(); adj[u << 1].clear();
dp[u << 1 | 1].clear(); adj[u << 1 | 1].clear();
}
}
}
main(){
ios_base::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
// freopen("code.inp", "r", stdin);
// freopen("code.out", "w", stdout);
cin >> n;
for(int i = 1; i <= n; ++i) cin >> d[i];
f[0][1] = 1;
for(int i = n; i >= 1; --i){
// adj[i].push_back(i);
int u = i, j =0;
while(u > 0){
++j;
adj[i].push_back(u);
if(u - 1 > 0 && u % 2 == 1) adj[i].push_back(u - 1);
u >>= 1;
}
// cout << i << '#';
// for(auto p : adj[i])cout << p << ' ';
// cout << "\n";
}
for (int i = 1; i * 2 + 1 <= n; i ++){
for (int j = 0; j < adj[i].size(); ++j){
if (f[j][i]) {
int pos = adj[i][j];
if (d[2 * i + 1] < d[pos] && d[2 * i + 1] < d[2 * i])
f[0][2 * i] = f[1][2 * i + 1] = 1;
else if (d[2 * i] < d[pos])
f[0][2 * i + 1] = 1;
else
f[0][2 * i] = f[0][2 * i + 1] = 1;
}
}
}
for(int i = n; i >= 1; --i) update(i);
// for(int i )
for(auto p : dp[1][0]) cout << d[p] << ' ';
}
/*
5 2
3 2
2 5
3 4
3 1
*/
Compilation message
swap.cpp: In function 'void get(std::vector<int>&, std::vector<int>&, std::vector<int>&)':
swap.cpp:21:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
21 | for(int i = 1, j = 1, l = 1, pos; i <= b.size() || j <= c.size(); i += l, j += l, l <<= 1){
| ~~^~~~~~~~~~~
swap.cpp:21:58: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
21 | for(int i = 1, j = 1, l = 1, pos; i <= b.size() || j <= c.size(); i += l, j += l, l <<= 1){
| ~~^~~~~~~~~~~
swap.cpp:22:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
22 | for(pos = i; pos <= b.size() && pos <= i + l - 1; ++pos) a.push_back(b[pos - 1]);
| ~~~~^~~~~~~~~~~
swap.cpp:23:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
23 | for(pos = j; pos <= c.size() && pos <= j + l - 1; ++pos) a.push_back(c[pos - 1]);
| ~~~~^~~~~~~~~~~
swap.cpp: In function 'void ckmin(std::vector<int>&, std::vector<int>&)':
swap.cpp:34:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
34 | for(int i = 0; i < a.size(); ++i){
| ~~^~~~~~~~~~
swap.cpp: In function 'void update(int)':
swap.cpp:51:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
51 | for(int i = 0; i < adj[u].size(); ++i){
| ~~^~~~~~~~~~~~~~~
swap.cpp:57:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
57 | for(int i = 0; i < adj[u << 1].size(); ++i) L[adj[u << 1][i]] = i;
| ~~^~~~~~~~~~~~~~~~~~~~
swap.cpp:58:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
58 | for(int j = 0; j < adj[u].size(); ++j){
| ~~^~~~~~~~~~~~~~~
swap.cpp:75:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
75 | for(int i = 0; i < adj[u << 1].size(); ++i) L[adj[u << 1][i]] = i;
| ~~^~~~~~~~~~~~~~~~~~~~
swap.cpp:76:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
76 | for(int i = 0; i < adj[u << 1 | 1].size(); ++i) R[adj[u << 1 | 1][i]] = i;
| ~~^~~~~~~~~~~~~~~~~~~~~~~~
swap.cpp:77:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
77 | for(int j = 0; j < adj[u].size(); ++j){
| ~~^~~~~~~~~~~~~~~
swap.cpp: At global scope:
swap.cpp:105:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
105 | main(){
| ^~~~
swap.cpp: In function 'int main()':
swap.cpp:127:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
127 | for (int j = 0; j < adj[i].size(); ++j){
| ~~^~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
14680 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
14680 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
14680 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
14680 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
14680 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
