路灯代码 #include <iostream> #include <string> #include <vector> using namespace std; /*n个方格，亮pos pos-1 pos+1，X是障碍物*/ /*2 * 3 * ..x * 5 * ....x * */ /* * 1 * 2 * */ int main() {     int num = 0;     int n = 0, k = 0;     int count = 0;     cin >> num;     int tmp = num;     vector<int> res(num, 0);     string str;     if (num >= 1 && num <= 1000) {         do {             cin >> n;             if (n >= 1 && n <= 1000) {                 cin >> str;                 if (str.length() == n) {                     num--;                     int i = 0;                     while (i < str.length()) {                         if (str[i] == '.') {                             count++;                             if (count == 3) {                                 res[k]++;                                 count = 0;                             }                         }                         else if (str[i] == 'x') {                             if (count == 0) {                                 i++;                                 continue;                             }                             res[k]++;                             count = 0;                         }                         else {                             break;                         }                         ++i;                     }                 }                 else {                     return 0;                 }             }             else {                 return 0;             }             if (count > 0) {                 res[k]++;                 count = 0;             }             k++;         } while (num > 0);         for (int i = 0; i < tmp; i++) {             cout << res[i] << endl;         }     }     else {         return 0;     }     return 0; }