QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#140283 | #4606. 无限之环 | myee | 100 ✓ | 5ms | 3664kb | C++11 | 5.2kb | 2023-08-15 16:55:09 | 2023-08-15 16:55:10 |
Judging History
answer
// 那就是希望。
// 即便需要取模,也是光明。
#include <algorithm>
#include <queue>
#include <stdio.h>
#include <vector>
typedef long long llt;
typedef unsigned uint;typedef unsigned long long ullt;
typedef bool bol;typedef char chr;typedef void voi;
typedef double dbl;
template<typename T>bol _max(T&a,T b){return(a<b)?a=b,true:false;}
template<typename T>bol _min(T&a,T b){return(b<a)?a=b,true:false;}
template<typename T>T lowbit(T n){return n&-n;}
template<typename T>T gcd(T a,T b){return b?gcd(b,a%b):a;}
template<typename T>T lcm(T a,T b){return(a!=0||b!=0)?a/gcd(a,b)*b:(T)0;}
template<typename T>T exgcd(T a,T b,T&x,T&y){if(b!=0){T ans=exgcd(b,a%b,y,x);y-=a/b*x;return ans;}else return y=0,x=1,a;}
template<typename T>T power(T base,T index,T mod)
{
T ans=1%mod;
while(index)
{
if(index&1)ans=ans*base%mod;
base=base*base%mod,index>>=1;
}
return ans;
}
// Heaven and Earth... My guiding star...
// Akira Complex R.I.P.
namespace Dinic
{
uint To[60005],Last[60005],End[10005],Cur[10005],n,tp;
bol Flow[60005],Init[60005];int Cost[60005],Dist[10005];
voi build(uint n){Dinic::n=n,tp=0;for(uint i=0;i<n;i++)End[i]=-1;}
voi insert(uint u,uint v,llt c)
{
To[tp]=v,Last[tp]=End[u],Flow[tp]=true,Cost[tp]=c,End[u]=tp++;
To[tp]=u,Last[tp]=End[v],Flow[tp]=false,Cost[tp]=-c,End[v]=tp++;
}
bol bfs(uint p,uint t)
{
for(uint i=0;i<n;i++)Dist[i]=1e9,Cur[i]=End[i];
Dist[p]=0;std::queue<uint>Q;Q.push(p),Init[p]=true;
while(Q.size())
{
p=Q.front(),Q.pop(),Init[p]=false;
for(uint e=End[p];~e;e=Last[e])
if(Flow[e]&&_min(Dist[To[e]],Dist[p]+Cost[e])&&!Init[To[e]])
Q.push(To[e]),Init[To[e]]=true;
}
return Dist[t]<1e8;
}
bol dfs(uint p,uint t)
{
if(p==t)return true;
if(Init[p])return false;
Init[p]=true;
for(uint&e=Cur[p];~e;e=Last[e])if(Flow[e]&&Dist[To[e]]==Dist[p]+Cost[e]&&dfs(To[e],t))
return Flow[e]=Init[p]=false,Flow[e^1]=true;
return Init[p]=false;
}
std::pair<uint,int>run(uint p,uint t)
{
uint ans=0;int c=0;
while(bfs(p,t))
{
Init[p]=true;
for(uint e=End[p];~e;e=Last[e])if(Flow[e]&&Dist[To[e]]==Cost[e]&&dfs(To[e],t))
ans++,c+=Dist[t],Flow[e]=false;
}
return{ans,c};
}
}
int main()
{
#ifdef MYEE
freopen("QAQ.in","r",stdin);
freopen("QAQ.out","w",stdout);
#endif
uint n,m;scanf("%u%u",&n,&m),Dinic::build(4*n*m+2);
for(uint i=1;i<n;i++)for(uint j=0;j<m;j++)
if((i+j)&1)Dinic::insert(((i-1)*m+j)<<2|2,(i*m+j)<<2,0);
else Dinic::insert((i*m+j)<<2,((i-1)*m+j)<<2|2,0);
for(uint i=0;i<n;i++)for(uint j=1;j<m;j++)
if((i+j)&1)Dinic::insert((i*m+(j-1))<<2|1,(i*m+j)<<2|3,0);
else Dinic::insert((i*m+j)<<2|3,(i*m+(j-1))<<2|1,0);
uint cnt=0;
for(uint p=0,v;p<n*m;p++)
{
uint op=(p/m+p%m)&1;
scanf("%u",&v);
if(!(v%5))
{
for(uint o=0;o<4;o++)if(v>>o&1)
{
cnt++;
if(op)Dinic::insert(p<<2|o,(n*m)<<2|1,0);else Dinic::insert((n*m)<<2,p<<2|o,0);
}
continue;
}
if(v==lowbit(v))
{
uint o=v<=2?v==2:2+(v==8);cnt++;
if(op)Dinic::insert(p<<2|o,(n*m)<<2|1,0),
Dinic::insert(p<<2|(o^1),p<<2|o,1),
Dinic::insert(p<<2|(o^2),p<<2|o,2),
Dinic::insert(p<<2|(o^3),p<<2|o,1);
else Dinic::insert((n*m)<<2,p<<2|o,0),
Dinic::insert(p<<2|o,p<<2|(o^1),1),
Dinic::insert(p<<2|o,p<<2|(o^2),2),
Dinic::insert(p<<2|o,p<<2|(o^3),1);
continue;
}
if((15^v)==lowbit(15^v))
{
uint o=v>=13?v==13:2+(v==7);cnt+=3;
if(op)Dinic::insert(p<<2|o,p<<2|(o^1),1),
Dinic::insert(p<<2|o,p<<2|(o^2),2),
Dinic::insert(p<<2|o,p<<2|(o^3),1),
Dinic::insert(p<<2|(o^1),(n*m)<<2|1,0),
Dinic::insert(p<<2|(o^2),(n*m)<<2|1,0),
Dinic::insert(p<<2|(o^3),(n*m)<<2|1,0);
else Dinic::insert(p<<2|(o^1),p<<2|o,1),
Dinic::insert(p<<2|(o^2),p<<2|o,2),
Dinic::insert(p<<2|(o^3),p<<2|o,1),
Dinic::insert((n*m)<<2,p<<2|(o^1),0),
Dinic::insert((n*m)<<2,p<<2|(o^2),0),
Dinic::insert((n*m)<<2,p<<2|(o^3),0);
continue;
}
for(uint o=0;o<4;o++)if(v>>o&1)
{
cnt++;
if(op)
Dinic::insert(p<<2|o,(n*m)<<2|1,0),
Dinic::insert(p<<2|(o^2),p<<2|o,1);
else
Dinic::insert((n*m)<<2,p<<2|o,0),
Dinic::insert(p<<2|o,p<<2|(o^2),1);
}
}
auto t=Dinic::run((n*m)<<2,(n*m)<<2|1);
if(t.first*2!=cnt)return puts("-1"),0;
printf("%d\n",t.second);
return 0;
}
// 那就是希望。
// 即便需要取模,也是光明。
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 5
Accepted
time: 1ms
memory: 3096kb
input:
4 4 8 2 2 0 5 8 11 9 5 12 14 11 12 6 8 12
output:
17
result:
ok 1 number(s): "17"
Test #2:
score: 5
Accepted
time: 1ms
memory: 3280kb
input:
4 4 9 3 1 9 14 3 12 7 11 13 14 9 3 3 0 0
output:
16
result:
ok 1 number(s): "16"
Test #3:
score: 5
Accepted
time: 4ms
memory: 3528kb
input:
14 124 6 8 3 10 10 7 2 6 11 10 2 1 3 1 14 10 10 14 10 4 8 13 1 8 2 2 0 0 12 7 8 4 10 4 0 0 9 10 13 2 4 13 14 12 9 1 2 8 1 0 6 6 4 4 4 2 2 2 10 1 1 13 2 4 0 2 7 3 6 14 4 4 9 10 9 4 4 2 6 1 4 4 10 4 2 10 10 1 1 8 6 11 10 13 6 9 11 2 8 4 0 6 9 6 2 2 14 7 14 3 12 7 14 14 10 13 1 8 12 8 9 8 3 3 1 8 15 10...
output:
1272
result:
ok 1 number(s): "1272"
Test #4:
score: 5
Accepted
time: 3ms
memory: 3396kb
input:
13 113 0 1 11 12 2 3 11 11 14 4 1 6 8 0 1 1 8 8 8 1 0 0 0 12 12 0 1 8 0 0 2 6 9 11 1 0 8 3 0 9 4 4 0 2 6 13 12 4 9 6 6 4 0 0 12 7 1 3 4 0 0 0 2 3 8 2 0 0 6 10 14 2 6 11 4 2 0 9 13 10 7 9 2 12 10 12 0 3 3 2 0 0 2 4 0 0 6 10 14 6 3 11 14 10 4 4 3 10 9 2 14 4 0 3 10 12 9 15 15 7 5 4 2 14 12 6 8 8 9 3 6...
output:
1013
result:
ok 1 number(s): "1013"
Test #5:
score: 5
Accepted
time: 3ms
memory: 3472kb
input:
114 13 0 12 6 1 8 3 10 14 3 12 11 6 2 8 5 12 4 0 12 14 9 5 13 14 14 11 4 13 6 2 10 12 4 9 7 15 7 15 11 1 9 1 0 6 7 10 15 10 13 1 4 5 8 0 2 1 15 9 2 1 0 11 15 3 8 11 8 13 6 14 13 8 8 10 7 3 11 2 14 7 7 13 8 2 3 13 11 15 14 3 8 5 8 0 2 4 4 13 5 5 13 15 14 4 9 1 0 1 11 6 6 15 14 5 7 15 4 2 6 8 8 1 11 1...
output:
1100
result:
ok 1 number(s): "1100"
Test #6:
score: 5
Accepted
time: 4ms
memory: 3448kb
input:
103 14 0 0 4 8 9 11 9 6 2 4 2 0 9 8 1 1 5 11 14 12 14 11 0 5 11 10 15 9 5 6 11 5 9 10 11 15 12 4 4 0 1 5 11 10 15 13 5 1 10 15 14 1 4 6 9 5 14 13 15 6 12 10 14 15 7 1 1 13 13 5 5 13 15 4 2 10 3 5 0 2 9 10 15 12 3 15 14 3 4 2 0 7 6 5 13 13 13 3 1 11 4 12 4 9 10 12 8 5 8 6 10 7 4 12 3 10 14 15 7 14 10...
output:
1064
result:
ok 1 number(s): "1064"
Test #7:
score: 5
Accepted
time: 4ms
memory: 3600kb
input:
111 14 0 9 10 1 2 0 4 3 2 4 10 2 0 1 4 5 0 0 5 4 14 14 3 4 9 14 11 12 5 5 0 3 13 2 11 7 4 4 11 7 6 0 1 6 10 15 7 1 13 11 7 14 11 1 0 0 4 1 4 6 1 0 5 8 14 7 7 4 4 0 5 7 10 3 4 8 13 6 9 4 14 7 10 9 8 8 0 5 0 0 6 6 0 0 5 4 0 8 8 10 4 2 0 2 15 15 10 10 7 1 0 0 12 10 9 0 8 4 14 9 3 10 10 1 4 0 14 10 13 0...
output:
1143
result:
ok 1 number(s): "1143"
Test #8:
score: 5
Accepted
time: 3ms
memory: 3476kb
input:
13 100 0 0 9 12 3 1 1 7 8 0 9 12 8 2 3 1 0 3 12 0 8 6 2 1 12 6 0 9 9 6 10 13 2 12 7 12 4 9 10 4 8 8 6 10 3 0 4 12 10 7 6 9 11 13 13 10 6 6 3 1 6 4 8 12 14 12 8 2 1 11 2 0 2 7 8 0 9 12 1 8 2 0 12 8 0 2 6 1 14 10 14 14 2 2 12 10 12 4 1 1 0 0 5 5 2 1 6 11 0 9 11 12 8 1 11 15 14 15 15 2 4 12 8 9 11 15 8...
output:
971
result:
ok 1 number(s): "971"
Test #9:
score: 5
Accepted
time: 4ms
memory: 3476kb
input:
43 44 6 11 6 9 2 0 3 1 6 13 10 7 1 8 4 13 1 6 6 0 3 10 3 0 3 7 11 3 4 8 4 4 3 7 10 7 10 9 8 4 8 1 8 4 9 15 11 15 9 6 13 1 7 13 13 11 7 15 9 5 1 15 12 6 7 12 15 13 13 11 9 7 9 12 10 7 15 13 14 15 4 1 1 8 12 7 5 5 2 11 8 9 3 12 4 0 9 13 14 3 7 15 12 4 6 13 0 5 12 15 14 12 1 2 4 15 6 0 8 9 7 10 7 9 9 6...
output:
1351
result:
ok 1 number(s): "1351"
Test #10:
score: 5
Accepted
time: 2ms
memory: 3544kb
input:
44 44 1 8 0 0 2 8 1 0 0 9 10 12 0 12 11 3 8 14 4 3 11 2 0 2 4 1 9 8 12 9 9 1 0 12 9 2 10 10 10 10 3 0 1 8 1 0 0 4 11 12 2 1 0 1 9 15 2 14 15 15 10 11 3 13 15 1 0 0 0 0 11 14 11 13 15 10 7 15 15 14 10 10 10 4 4 0 9 9 14 1 6 15 7 5 2 9 10 1 5 13 2 9 15 12 1 1 7 7 7 9 4 14 10 9 1 12 7 14 14 13 14 15 11...
output:
1483
result:
ok 1 number(s): "1483"
Test #11:
score: 5
Accepted
time: 1ms
memory: 3656kb
input:
43 43 1 10 1 1 9 1 4 0 4 12 14 10 13 14 14 1 6 7 6 2 4 4 3 6 7 1 0 4 13 3 3 10 10 2 2 10 14 10 10 13 10 12 0 3 8 9 15 11 11 7 9 15 14 8 0 5 6 11 2 5 3 11 8 8 8 5 5 3 10 1 8 3 12 5 9 10 7 6 0 1 4 11 14 9 7 3 14 8 5 8 8 14 14 6 2 1 1 12 6 10 7 12 11 10 10 10 7 6 5 5 9 8 0 1 0 2 2 4 0 9 11 10 10 3 8 1 ...
output:
1330
result:
ok 1 number(s): "1330"
Test #12:
score: 5
Accepted
time: 5ms
memory: 3460kb
input:
42 42 8 14 13 10 14 6 0 0 2 12 10 8 8 6 6 1 0 0 1 3 1 10 10 10 10 13 9 1 10 12 6 7 14 8 8 2 7 2 4 0 9 1 2 11 11 8 14 3 2 3 11 8 2 1 5 14 15 15 10 10 3 6 8 12 10 2 12 14 15 10 13 15 13 2 5 6 7 1 3 12 1 12 14 0 0 11 15 10 15 10 15 15 13 7 7 6 11 15 15 7 1 2 12 10 9 6 9 0 7 7 14 4 11 14 9 1 6 7 10 8 4 ...
output:
1281
result:
ok 1 number(s): "1281"
Test #13:
score: 5
Accepted
time: 4ms
memory: 3544kb
input:
43 43 4 1 0 2 0 0 3 10 7 13 4 6 10 10 9 4 7 1 0 4 11 4 12 9 8 0 3 10 4 1 14 14 4 0 0 3 10 4 1 8 1 2 1 0 8 0 7 9 3 15 8 9 15 10 15 12 6 3 4 13 8 4 6 13 10 14 1 11 3 9 10 6 8 4 9 10 10 10 13 1 1 6 4 3 11 5 8 14 2 14 11 14 11 0 8 8 8 6 9 15 14 1 5 3 11 7 3 8 15 10 11 11 9 2 15 6 0 1 6 8 13 13 14 5 0 1 ...
output:
1368
result:
ok 1 number(s): "1368"
Test #14:
score: 5
Accepted
time: 5ms
memory: 3664kb
input:
42 44 4 12 6 2 2 1 6 10 14 7 4 2 1 0 1 14 10 1 3 9 8 8 4 0 2 4 9 2 4 8 3 0 4 8 10 13 8 9 2 9 8 0 4 1 2 3 11 4 5 5 8 2 11 15 6 9 13 8 2 7 8 0 2 5 3 13 10 14 10 4 11 13 12 0 5 12 6 0 12 6 9 14 2 4 0 9 11 4 0 0 5 2 6 5 6 12 12 7 5 1 3 2 0 3 14 0 8 13 2 9 9 2 9 4 5 13 11 4 1 14 9 3 6 3 14 3 7 14 8 5 3 1...
output:
1432
result:
ok 1 number(s): "1432"
Test #15:
score: 5
Accepted
time: 2ms
memory: 3540kb
input:
43 42 0 6 3 2 3 8 0 4 9 6 9 8 9 8 3 9 8 0 1 2 10 11 6 2 13 10 9 0 9 10 9 4 10 10 2 4 3 3 10 2 4 6 4 11 7 11 7 8 0 0 13 11 12 6 9 12 14 11 5 12 7 8 1 5 5 6 14 10 14 0 5 9 7 8 10 10 1 0 11 15 2 0 0 2 1 11 10 11 13 14 6 7 3 14 3 8 0 3 12 6 7 5 3 14 13 5 14 12 4 0 1 6 12 12 15 7 12 2 1 4 13 7 13 7 3 0 8...
output:
1357
result:
ok 1 number(s): "1357"
Test #16:
score: 5
Accepted
time: 5ms
memory: 3496kb
input:
44 43 8 11 10 13 10 10 13 10 10 7 8 0 6 2 12 10 10 2 9 4 9 10 1 1 8 14 11 8 8 1 6 8 8 1 3 3 4 3 10 10 14 6 2 0 5 1 5 2 10 14 11 11 15 6 2 14 9 8 12 8 0 5 4 13 11 2 12 12 8 4 0 9 3 4 2 0 0 14 15 2 12 10 10 3 7 12 9 15 11 6 8 10 11 6 5 13 12 0 8 5 6 9 0 8 11 12 11 13 14 12 6 10 10 11 9 5 9 7 3 9 2 4 2...
output:
1445
result:
ok 1 number(s): "1445"
Test #17:
score: 5
Accepted
time: 5ms
memory: 3524kb
input:
43 42 8 8 12 8 14 11 14 10 11 13 10 11 12 0 2 3 14 10 6 8 1 4 8 10 9 8 0 3 6 0 2 1 0 8 10 14 1 4 3 6 8 2 12 6 5 6 14 5 1 1 13 7 6 3 14 2 5 3 7 0 5 2 14 11 7 11 15 15 4 9 15 10 9 6 10 12 3 15 10 7 14 7 13 12 0 11 6 1 8 12 4 2 7 14 9 1 3 8 9 1 1 4 13 1 4 4 13 15 13 5 2 1 2 8 0 4 4 9 14 1 3 3 5 7 10 9 ...
output:
1364
result:
ok 1 number(s): "1364"
Test #18:
score: 5
Accepted
time: 2ms
memory: 3544kb
input:
42 44 8 3 10 8 1 8 6 10 7 14 10 12 0 6 12 4 10 10 10 7 7 11 10 14 10 10 2 9 12 0 4 12 8 1 0 12 12 1 0 0 0 4 1 2 13 11 1 0 13 14 9 4 13 11 10 11 1 4 6 3 9 2 2 4 3 9 4 3 0 6 10 6 1 1 5 1 4 7 3 4 4 9 6 1 2 6 1 8 11 6 3 10 14 8 13 3 1 14 10 10 10 10 6 5 12 10 7 8 12 14 11 13 10 6 1 8 14 6 1 12 6 11 15 2...
output:
1399
result:
ok 1 number(s): "1399"
Test #19:
score: 5
Accepted
time: 4ms
memory: 3536kb
input:
43 42 4 0 0 2 2 6 12 1 4 6 10 10 10 10 4 0 0 8 2 8 6 12 0 0 6 6 3 12 4 1 6 8 4 6 3 10 6 4 8 8 11 3 5 0 0 12 14 9 3 15 15 11 9 1 4 12 1 2 3 10 11 7 11 13 6 8 6 9 12 15 1 0 5 3 10 6 3 11 14 0 8 8 5 2 5 0 0 5 9 1 0 5 4 5 1 4 6 4 4 9 9 13 15 14 13 15 9 6 13 10 12 3 6 8 3 12 8 1 0 8 12 6 0 0 13 3 5 3 14 ...
output:
1281
result:
ok 1 number(s): "1281"
Test #20:
score: 5
Accepted
time: 4ms
memory: 3660kb
input:
42 43 2 1 2 1 3 12 4 8 8 9 7 8 4 8 10 12 8 8 12 7 3 2 2 1 0 2 11 9 12 2 6 10 7 3 0 1 2 4 1 3 10 10 12 4 5 4 10 6 14 9 11 13 5 14 12 8 2 12 15 14 13 15 15 11 9 7 7 3 13 14 3 6 7 11 0 5 4 2 14 11 4 6 3 12 10 9 0 11 12 4 10 14 3 6 7 13 5 5 4 15 9 7 10 13 6 7 13 10 3 3 11 14 12 10 2 14 7 10 9 12 12 7 6 ...
output:
1319
result:
ok 1 number(s): "1319"
Extra Test:
score: 0
Extra Test Passed