Regionals 2014 >> North America - Greater NY >> 7097 - Growing Rectangular Spiral
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7097 - Growing Rectangular Spiral
题目:
题目大意:方向固定,→↑←↓,每次走的步数要比前一次步绝对大。给出一个点,问是否能到达该点
题目思路:找规律。
如果x小于y那么,直接可到达。
另外情况可找规律发现,y小于4的情况无法到达,其余情况步数都为6,前面1,2,3固定。剩余3步可解方程得出。
题目链接:7097 - Growing Rectangular Spiral
以下是代码:
#include <vector>#include <map>#include <set>#include <algorithm>#include <iostream>#include <cstdio>#include <cmath>#include <cstdlib>#include <string>#include <cstring>using namespace std;int main(){ int p; scanf("%d",&p); while(p--) { int no,x,y; scanf("%d%d%d",&no,&x,&y); if (x < y) { printf("%d 2 %d %d\n",no,x,y); } else if (y >= 4) { printf("%d 6 1 2 3 %d %d %d\n",no,x - y + 5,x + 2,x + 3); } else { printf("%d NO PATH\n",no); } } return 0;}
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