度小满 9.13 笔试情况(风控模型岗)
两道题:
1.迷宫花费最少时间
2.最大上升子序列的 方案
第一题:不知道从哪里终止条件,所以设了一个dfs的深度上限,好在AC了,有知道的告知一下
def dfs(x,y,cost,depth,max_depth): if depth > max_depth: return cost += int(MAP[x][y]) if x==N-1 and y==N-1: res.append(cost) return else: if x-1>=0 and MAP[x-1][y] != '*': dfs(x-1,y,cost,depth+1,max_depth) if x+1<=N-1 and MAP[x+1][y] != '*': dfs(x+1,y,cost,depth+1,max_depth) if y-1>=0 and MAP[x][y-1] != '*': dfs(x,y-1,cost,depth+1,max_depth) if y+1<=N-1 and MAP[x][y+1] != '*': dfs(x,y+1,cost,depth+1,max_depth) return if __name__ == '__main__': N,K = list(map(int,input().split())) MAP = [] for i in range(N): line = input() line = line.replace('1','*').replace('0','1').replace('#',str(K)) MAP.append([c for c in line]) res = [] dfs(0,0,0,0,4*N) if res == []: print('No solution') else: print(min(res)-1)