华为-MP3光标位置

华为-MP3光标位置

题目链接

​​输入歌曲数量2 输入命令 U或者D

输出描述:

输出说明1 输出当前列表2 输出当前选中歌曲

示例1

输入

复制

10UUUU

输出

复制

7 8 9 107

题解：

#include #include using namespace std;int main(){ int n; string s; while (cin >> n >> s){ int point = 1; int now = 1; if (n <= 3){ for (int i = 1; i < n; i++){ cout << i << " "; } cout << n << endl; for (int i = 0; i < s.length(); i++){ if (s[i] == 'U'){ if (point == 1){ point = n; } else{ point--; } } else if (s[i] == 'D'){ if (point == n){ point = 1; } else{ point++; } } } cout << point << endl; } else{ for (int i = 0; i < s.length(); i++){ if (s[i] == 'U'){ if (point == 1){ point = n; now = 4; } else{ if (now != 1){ point--; now--; } else{ point--; } } } else if (s[i] == 'D'){ if (point == n){ point = 1; now = 1; } else{ if (now != 4){ point++; now++; } else{ point++; } } } } switch (now){ case 1:cout << point << " " << point + 1 << " " << point + 2 << " " << point + 3 << endl << point << endl;break; case 2:cout << point - 1 << " " << point << " " << point + 1 << " " << point + 2 << endl << point << endl;break; case 3:cout << point - 2 << " " << point - 1 << " " << point << " " << point + 1 << endl << point << endl;break; case 4:cout << point - 3 << " " << point - 2 << " " << point - 1 << " " << point << endl << point << endl;break; } } } return 0;}

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