結果
| 問題 |
No.1284 Flip Game
|
| コンテスト | |
| ユーザー |
rniya
|
| 提出日時 | 2020-11-06 22:54:29 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 66 ms / 2,000 ms |
| コード長 | 3,411 bytes |
| コンパイル時間 | 2,270 ms |
| コンパイル使用メモリ | 208,472 KB |
| 最終ジャッジ日時 | 2025-01-15 21:11:43 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 28 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
#define LOCAL
#pragma region Macros
typedef long long ll;
#define ALL(x) (x).begin(),(x).end()
const long long MOD=1000000007;
// const long long MOD=998244353;
const int INF=1e9;
const long long IINF=1e18;
const int dx[4]={1,0,-1,0},dy[4]={0,1,0,-1};
const char dir[4]={'D','R','U','L'};
template<typename T>
istream &operator>>(istream &is,vector<T> &v){
for (T &x:v) is >> x;
return is;
}
template<typename T>
ostream &operator<<(ostream &os,const vector<T> &v){
for (int i=0;i<v.size();++i){
os << v[i] << (i+1==v.size()?"": " ");
}
return os;
}
template<typename T,typename U>
ostream &operator<<(ostream &os,const pair<T,U> &p){
os << '(' << p.first << ',' << p.second << ')';
return os;
}
template<typename T,typename U>
ostream &operator<<(ostream &os,const map<T,U> &m){
os << '{';
for (auto itr=m.begin();itr!=m.end();++itr){
os << '(' << itr->first << ',' << itr->second << ')';
if (++itr!=m.end()) os << ',';
--itr;
}
os << '}';
return os;
}
template<typename T>
ostream &operator<<(ostream &os,const set<T> &s){
os << '{';
for (auto itr=s.begin();itr!=s.end();++itr){
os << *itr;
if (++itr!=s.end()) os << ',';
--itr;
}
os << '}';
return os;
}
void debug_out(){cerr << '\n';}
template<class Head,class... Tail>
void debug_out(Head&& head,Tail&&... tail){
cerr << head;
if (sizeof...(Tail)>0) cerr << ", ";
debug_out(move(tail)...);
}
#ifdef LOCAL
#define debug(...) cerr << " ";\
cerr << #__VA_ARGS__ << " :[" << __LINE__ << ":" << __FUNCTION__ << "]" << '\n';\
cerr << " ";\
debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif
template<typename T> T gcd(T x,T y){return y!=0?gcd(y,x%y):x;}
template<typename T> T lcm(T x,T y){return x/gcd(x,y)*y;}
template<class T1,class T2> inline bool chmin(T1 &a,T2 b){
if (a>b){a=b; return true;} return false;
}
template<class T1,class T2> inline bool chmax(T1 &a,T2 b){
if (a<b){a=b; return true;} return false;
}
#pragma endregion
using T=tuple<ll,int,int,int>;
const int MAX_N=9;
ll dp[1<<MAX_N][1<<MAX_N][MAX_N];
int v[MAX_N];
int main(){
cin.tie(0);
ios::sync_with_stdio(false);
int N; cin >> N;
vector<vector<int>> c(N,vector<int>(N)); cin >> c;
for (int i=0;i<(1<<N);++i){
for (int j=0;j<(1<<N);++j){
for (int k=0;k<N;++k){
dp[i][j][k]=IINF;
}
}
}
priority_queue<T,vector<T>,greater<T>> pq;
for (int i=0;i<N;++i){
dp[0][1<<i][i]=0;
pq.emplace(dp[0][1<<i][i],0,1<<i,i);
}
while (!pq.empty()){
auto t=pq.top(); pq.pop();
int mask1=get<1>(t),mask2=get<2>(t),i=get<3>(t);
if (dp[mask1][mask2][i]<get<0>(t)) continue;
for (int j=0;j<N;++j){
if (mask2&1<<j) continue;
int nmask1=mask1,nmask2=mask2;
nmask2|=1<<j;
if (!(mask1&1<<i)){
nmask1|=1<<i;
nmask2^=1<<i;
}
if (chmin(dp[nmask1][nmask2][j],dp[mask1][mask2][i]+c[i][j])){
pq.emplace(dp[nmask1][nmask2][j],nmask1,nmask2,j);
}
}
}
ll ans=IINF;
for (int mask1=0;mask1<(1<<N);++mask1){
for (int i=0;i<N;++i){
chmin(ans,dp[mask1][(1<<N)-1][i]);
}
}
cout << ans << '\n';
}
rniya