#include<bits/stdc++.h>
using namespace std;
namespace std {
// #include<Love>
using ll=long long;
using str=string;
using int128=__int128_t;
using ld=long double;
typedef unsigned int ui;
typedef unsigned long long ull;
#define Love<3 HerLoveForMeJustaDream
}
#define Lovesper_ ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define pll pair<ll,ll>
#define mll map<ll,ll>
#define vll vector<ll>
#define pb push_back
#define all(c) c.begin(),c.end()
#define fi first
#define se second
#define debug cout<<"I Love You\n";
#define fu(i,a,b) for(ll i=a;i<=b;i++)
#define fd(i,a,b) for(int i=a;i>=b;i--)
#define fa(i,s) for(auto&i:s)
#define Bitc(x,i) (((x)>>(i))&1)
#define _log(_x) 63-__builtin_clzll(_x)
#define LoveTime chrono::steady_clock::now().time_since_epoch().count()
const pll dxy4[]={{-1,0},{0,-1},{0,1},{1,0}};
const pll dxy8[]={{-1,-1},{-1,0},{-1,1},{0,-1},{0,1},{1,-1},{1,0},{1,1}};
constexpr ll Mod=1e9+7;
constexpr ll mxn=1e6+7,mxm=3e3+7;
constexpr long long inf=(1ll<<31);
constexpr ll lnf=(1ll<<60);
struct __TS {
~__TS() {
// cerr<<"Time elapsed: "<<clock()*1.0/CLOCKS_PER_SEC<<'\n';
}
}__ts;
mt19937 rng(LoveTime);
#define setup ((1<<3)-1>>1)
void OpenLove(const str&name){
// I'm So Lonely. I am Trying To Get Out This Lonely With Her Love
Lovesper_
if(fopen((name+".inp").c_str(),"r")){
// freopen((name+".test").c_str(),"r",stdin);
freopen((name+".inp").c_str(),"r",stdin);
freopen((name+".out").c_str(),"w",stdout);
}
}
template<class X,class Y>bool maximize(X&x,const Y&y){X eps=1e-18;if(x+eps<y){x=y;return 1;}return 0;}
template<class X,class Y>bool minimize(X&x,const Y&y){X eps=1e-18;if(x>y+eps){x=y;return 1;}return 0;}
template <class Fun>class y_combinator_result {
Fun fun_;
public:
template<class T>explicit y_combinator_result(T &&fun): fun_(std::forward<T>(fun)) {}
template<class ...Args>decltype(auto) operator()(Args &&...args) {return fun_(std::ref(*this), std::forward<Args>(args)...);}
};
template<class Fun>decltype(auto) y_combinator(Fun &&fun) {return y_combinator_result<std::decay_t<Fun>>(std::forward<Fun>(fun));}
ostream&operator<<( std::ostream& dest, __int128_t value){
ostream::sentry s(dest);__uint128_t tmp=value<0?-value:value;
char buffer[128];char*d=end(buffer);
do{d--;*d="0123456789"[tmp%10];tmp/=10;}while(tmp);
if(value<0)d--,*d='-';ll len=end(buffer)-d;
if(dest.rdbuf()->sputn(d,len)!=len)dest.setstate(ios_base::badbit);
return dest;
}
struct custom_hash{
size_t operator()(uint64_t x)const{
static const uint64_t HashRand=LoveTime;
x^=HashRand;return x^(x>>16);
}};
int64_t add(ll&a,ll b){a+=b;if(a>=Mod)a%=Mod;while(a<0)a+=Mod;return a;}
int64_t mul(ll&a,ll b,ll mod){a=1ll*a*b%mod;return a;}
int64_t mpow(ll a,ll b,ll mod){ll ans=1;for(;b;b>>=1,a=mul(a,a,mod))if(b&1)ans=mul(ans,a,mod);return ans;}
ll n,m,g[mxn];
vector<pll>graph[mxn];
void Lovesper(const ll&TestCase){
cin>>n>>m;
vector<vector<char>>f(n+7,vector<char>(m+7));
vector<vll>d(n+7,vll(m+7));
vector<vll>vis(n+7,vll(m+7));
pll start,end;
fu(i,1,n)fu(j,1,m){
char x;cin>>x;f[i][j]=x;
if(x=='o')start={i,j};
if(x=='x')end={i,j};
d[i][j]=lnf;
}
deque<pll>Q;
str direction="^<>v";
str oppsite="v><^";
d[start.fi][start.se]=0;
Q.push_front({start.fi,start.se});
while(!Q.empty()){
auto[i,j]=Q.front();Q.pop_front();
if(f[i][j]=='x')continue;
fu(t,0,3){
auto[_i,_j]=dxy4[t];
ll x=i+_i,y=j+_j;
if(x<0||x>n||y<0||y>m)continue;
ll w=1;
if(f[x][y]=='o')w=0;
if(direction[t]==f[i][j])w=0;
if(d[x][y]<=d[i][j]+w)continue;
d[x][y]=d[i][j]+w;
if(!w)Q.push_front({x,y});
else Q.push_back({x,y});
}
}
cout<<d[end.fi][end.se]-1<<'\n';
auto dfs=y_combinator([&](auto&&dfs,ll i,ll j)->bool {
vis[i][j]=1;
fu(t,0,3){
auto[_i,_j]=dxy4[t];
ll x=i+_i,y=j+_j;
if(x<0||x>n||y<0||y>m||vis[x][y])continue;
if(f[x][y]=='o')return true;
ll w=1;
if(f[x][y]==oppsite[t])w=0;
if(d[i][j]!=d[x][y]+w)continue;
if(dfs(x,y)){f[x][y]=oppsite[t];return true;}
}
return false;
});
dfs(end.fi,end.se);
fu(i,1,n){
fu(j,1,m)cout<<f[i][j];
cout<<'\n';
}
}
signed main(int argc, char const *argv[]){
OpenLove("lovesper");
int tt=1;
// cin>>tt;
for(ll i=1;i<=tt;i++){
Lovesper(i);
if(i<tt)cout<<'\n';
}
return false;
}
Compilation message
Main.cpp:14:13: warning: ISO C++11 requires whitespace after the macro name
14 | #define Love<3 HerLoveForMeJustaDream
| ^~~~
Main.cpp: In function 'std::ostream& operator<<(std::ostream&, __int128)':
Main.cpp:75:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
75 | if(value<0)d--,*d='-';ll len=end(buffer)-d;
| ^~
Main.cpp:75:27: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
75 | if(value<0)d--,*d='-';ll len=end(buffer)-d;
| ^~
Main.cpp: In function 'void OpenLove(const str&)':
Main.cpp:56:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
56 | freopen((name+".inp").c_str(),"r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:57:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
57 | freopen((name+".out").c_str(),"w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
25168 KB |
Output is correct |
| 2 |
Correct |
5 ms |
25168 KB |
Output is correct |
| 3 |
Correct |
5 ms |
25168 KB |
Output is correct |
| 4 |
Correct |
6 ms |
25340 KB |
Output is correct |
| 5 |
Correct |
5 ms |
25168 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
25168 KB |
Output is correct |
| 2 |
Correct |
5 ms |
25168 KB |
Output is correct |
| 3 |
Correct |
5 ms |
25168 KB |
Output is correct |
| 4 |
Correct |
6 ms |
25340 KB |
Output is correct |
| 5 |
Correct |
5 ms |
25168 KB |
Output is correct |
| 6 |
Correct |
49 ms |
34632 KB |
Output is correct |
| 7 |
Correct |
47 ms |
36936 KB |
Output is correct |
| 8 |
Correct |
115 ms |
49540 KB |
Output is correct |
| 9 |
Correct |
183 ms |
70156 KB |
Output is correct |
| 10 |
Correct |
283 ms |
84044 KB |
Output is correct |
| 11 |
Correct |
321 ms |
99644 KB |
Output is correct |
