PAT 1091. Acute Stroke (30)
2015-03-08 22:08
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用BFS做的。
#include <stdio.h> #include <queue> using namespace std; struct node{ int i,j,k; node(int i=-1,int j=-1,int k=-1):i(i),j(j),k(k){}//!! }; int M,N,L,T; bool visited[61][1280][128]; int pic[61][1280][128]; int local,total; queue<node> q; bool avail(int i,int j,int k){ if (i>=L||j>=M||k>=N||i<0||j<0||k<0) return false; if (pic[i][j][k]==0) return false; if (visited[i][j][k]==true) return false; return true; } void push(int i,int j,int k){ if (avail(i, j, k)) { visited[i][j][k]=1; node newP(i,j,k); q.push(newP); local++; } } void BFS(){ while (!q.empty()) { node tmp=q.front(); q.pop(); int i=tmp.i,j=tmp.j,k=tmp.k; push(i-1,j,k); push(i+1,j,k); push(i,j-1,k); push(i,j+1,k); push(i,j,k-1); push(i,j,k+1); } } int main(){ //freopen("/Users/pantingting/Documents/code/data/input", "r", stdin); scanf("%d%d%d%d",&M,&N,&L,&T); for (int i=0; i<L; i++){ for (int j=0; j<M; j++){ for (int k=0; k<N; k++){ scanf("%d",&pic[i][j][k]); visited[i][j][k]=false; } } } for (int i=0; i<L; i++) { for (int j=0; j<M; j++) { for (int k=0; k<N; k++) { if (avail(i, j, k)) { node nd(i,j,k); q.push(nd); visited[i][j][k]=true; local=1; BFS(); if (local>=T) { total+=local; } } } } } printf("%d\n",total); return 0; }
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