水題,按條件判一下,考的時候不是這么寫的，更簡練一些,這題也可以用vector或者map寫,更加精練一些

#include<iostream>#include<vector>#include<string>using namespace std;int main(){	string str[5005], fz[5005];	int n, m, k, s, i, j;	scanf("%d %d %d", &m, &n, &s);	for (i = 0; i < m; i++) {		cin >> str[i];	}	if (s> m) {		cout << "Keep going..." << endl;		return 0;	}	cout << str[s - 1] << endl;	k = 0;	int flag = 0;	fz[k++] = str[s - 1];	for (i = s - 1 + n; i < m;) {		for (j = 0; j < k; j++) {			if (str[i] == fz[j]) {				flag = 1;				break;			}		}		if (flag) {			flag = 0;			i++;		}		else {			cout << str[i] << endl;			fz[k++] = str[i];			i += n;		}	}	return 0;}