Initially, there is a Robot at position (0, 0). Given a sequence of its moves, judge if this robot makes a circle, which means it moves back to the original place.
The move sequence is represented by a string. And each move is represent by a character. The valid robot moves are R (Right), L (Left), U (Up) and D (down). The output should be true or false representing whether the robot makes a circle.
Example 1:
Input: "UD" Output: true
Example 2:
Input: "LL" Output: falsehttp://www.cnblogs.com/pk28/
嗯，这题我见过，没啥说的，统计一下个数就行
class Solution { public: bool judgeCircle(string moves) { int n = moves.size(); int a = 0, b = 0, c = 0, d = 0; for (int i = 0; i < n; ++i) { if (moves[i] == 'U') a++; if (moves[i] == 'D') b++; if (moves[i] == 'L') c++; if (moves[i] == 'R') d++; } if (a==b && c==d) return true; return false; } };
转载于:https://www.cnblogs.com/pk28/p/7374850.html
相关资源：垃圾分类数据集及代码