Problem Link : http://train.usaco.org/usacoprob2?a=tffkkLavmsp&S=milk3
/* PROG: milk3 LANG: C++ */ #include <bits/stdc++.h> #define pii pair <int,int> #define sc scanf #define pf printf #define Pi 2*acos(0.0) #define ms(a,b) memset(a, b, sizeof(a)) #define pb(a) push_back(a) #define MP make_pair #define db double #define ll long long #define EPS 10E-10 #define ff first #define ss second #define sqr(x) (x)*(x) #define D(x) cout<<#x " = "<<(x)<<endl #define VI vector <int> #define DBG pf("Hi\n") #define MOD 100007 #define MAX 10000 #define CIN ios_base::sync_with_stdio(0); cin.tie(0) #define SZ(a) (int)a.size() #define sf(a) scanf("%d",&a) #define sfl(a) scanf("%lld",&a) #define sff(a,b) scanf("%d %d",&a,&b) #define sffl(a,b) scanf("%lld %lld",&a,&b) #define sfff(a,b,c) scanf("%d %d %d",&a,&b,&c) #define sfffl(a,b,c) scanf("%lld %lld %lld",&a,&b,&c) #define loop(i,n) for(int i=0;i<n;i++) #define REP(i,a,b) for(int i=a;i<b;i++) #define TEST_CASE(t) for(int z=1;z<=t;z++) #define PRINT_CASE printf("Case %d: ",z) #define all(a) a.begin(),a.end() #define intlim 2147483648 #define inf 1000000 #define ull unsigned long long using namespace std; /*----------------------Graph Moves----------------*/ //const int fx[]={+1,-1,+0,+0}; //const int fy[]={+0,+0,+1,-1}; //const int fx[]={+0,+0,+1,-1,-1,+1,-1,+1}; // Kings Move //const int fy[]={-1,+1,+0,+0,+1,+1,-1,-1}; // Kings Move //const int fx[]={-2, -2, -1, -1, 1, 1, 2, 2}; // Knights Move //const int fy[]={-1, 1, -2, 2, -2, 2, -1, 1}; // Knights Move /*------------------------------------------------*/ /*-----------------------Bitmask------------------*/ //int Set(int N,int pos){return N=N | (1<<pos);} //int reset(int N,int pos){return N= N & ~(1<<pos);} //bool check(int N,int pos){return (bool)(N & (1<<pos));} /*------------------------------------------------*/ struct data { int a,b,c; data() { ; } data(int x, int y, int z) { a=x,b=y,c=z; } }; int A,B,C; bool ans[30]; bool visited[30][30][30]; int first=100; void BFS(data x) { map<data,bool>mp; queue<data>Q; visited[x.a][x.b][x.c]=1; Q.push(x); while(!Q.empty()) { data u=Q.front(); Q.pop(); if(u.a==0) ans[u.c]=1,first=min(first,u.c); int bb=B-u.b,aa=A-u.a,cc=C-u.c; if(u.c) { data c2b=u,c2a=u; if(bb>=u.c) { c2b.b+=u.c; c2b.c=0; } else if(bb<u.c) { c2b.b=B; c2b.c-=bb; } if(aa>=u.c) { c2a.a+=u.c; c2a.c=0; } else if(aa<u.c) { c2a.a=A; c2a.c-=aa; } if(!visited[c2b.a][c2b.b][c2b.c]) { Q.push(c2b); visited[c2b.a][c2b.b][c2b.c]=1; } if(!visited[c2a.a][c2a.b][c2a.c]) { Q.push(c2a); visited[c2b.a][c2b.b][c2b.c]=1; } } if(u.b) { data b2a=u,b2c=u; if(aa>=u.b) { b2a.a+=u.b; b2a.b=0; } else { b2a.a=A; b2a.b-=aa; } if(cc>=u.b) { b2c.c+=u.b; b2c.b=0; } else { b2c.c=C; b2c.b-=cc; } if(!visited[b2a.a][b2a.b][b2a.c]) { visited[b2a.a][b2a.b][b2a.c]=1; Q.push(b2a); } if(!visited[b2c.a][b2c.b][b2c.c]) { visited[b2c.a][b2c.b][b2c.c]=1; Q.push(b2c); } } if(u.a) { data a2b=u,a2c=u; if(bb>=u.a) { a2b.b+=u.a; a2b.a=0; } else { a2b.b=B; a2b.a-=bb; } if(cc>=u.a) { a2c.c+=u.a; a2c.a=0; } else { a2c.c=C; a2c.c-=cc; } if(!visited[a2c.a][a2c.b][a2c.c]) { visited[a2c.a][a2c.b][a2c.c]=1; Q.push(a2c); } if(!visited[a2b.a][a2b.b][a2b.c]) { visited[a2b.a][a2b.b][a2b.c]=1; Q.push(a2b); } } } } int main() { freopen("milk3.in","r",stdin); freopen("milk3.out","w",stdout); cin>>A>>B>>C; BFS(data(0,0,C)); cout<<first; for(int i=first+1; i<=C; i++) if(ans[i]) cout<<" "<<i; cout<<endl; return 0; }