标签:blog http io ar for on 2014 log 代码
题目链接:点击打开链接
先来个暴力程序找下规律。
若n*r*c 是偶数,则是必败态,输出0.000000
否则对于3*3*3 赢的位置有:
1 0 1
0 1 0
1 0 1
0 1 0
1 0 1
0 1 0
1 0 1
0 1 0
1 0 1
1为必胜点。也就是说左上角是1,这样扩散出去。
答案就是所有1位置的概率和。
暴力程序:#include <cstdio> #include <cstring> int n, m, d, step[6][3] = {0,0,1, 0,0,-1, 0,1,0, 0,-1,0, 1,0,0, -1,0,0}; bool inmap(int x, int y,int z){return 1<=x&&x<=n&&1<=y&&y<=m&&1<=z&&z<=d;} bool vis[20][20][20]; bool dfs(int x, int y,int z){//0是先手 vis[x][y][z] = 1; for(int i = 0; i < 6; i++) { int a = x + step[i][0], b = y + step[i][1], c = z + step[i][2]; if(!inmap(a,b,c) || vis[a][b][c])continue; if(dfs(a,b,c)) { vis[x][y][z] = 0; return false; } } vis[x][y][z] = 0; return true; } bool work(){ memset(vis, 0, sizeof vis); for(int i = 1; i <= n; i++) for(int j = 1; j <= m; j++){ for(int k = 1; k <= d; k++) printf("%d ", dfs(i,j,k)); puts(""); } } int main(){ while(~scanf("%d%d%d", &n, &m, &d)) work(); return 0; }ac代码:
#include <cstdio> int main() { int n, r, c; while(~scanf("%d%d%d", &n, &r, &c)) { double x, sum = 0; for(int i = 1; i <= n; i ++) { for(int j = 1; j <= r; j ++) { for(int k = 1; k <= c; k ++) { scanf("%lf", &x); if((i + j + k) & 1) sum += x; } } } if((n*r*c) & 1) printf("%.6f\n", sum); else puts("0.000000"); } return 0; }
标签:blog http io ar for on 2014 log 代码
原文地址:http://blog.csdn.net/qq574857122/article/details/41173969