直接用set和map做個(gè)偽hash就好了。

注意keep going后面三個(gè)點(diǎn)。。我復(fù)制還復(fù)制少了。。哭暈

#include <iostream>#include <vector>#include <string>#include <set>#include <map>#include <cstring>#define MAX 1010using namespace std;int m, n, i;bool isVis[MAX];string list[MAX];set <string> s;int pos = 0;map <string, int> str2int;int main() {	cin >> m >> n >> i;	for (int j = 1; j <= m; j++) {		cin >> list[j];		s.insert(list[j]);	}	set <string>::iterator it;	for (it = s.begin(); it != s.end(); it++) {		str2int[*it] = pos++;	}	memset(isVis, false, sizeof(isVis));	bool tag = false;	for (int j = i; j <= m; ) {		if (!isVis[str2int[list[j]]]) {			isVis[str2int[list[j]]] = true;			tag = true;			cout << list[j] << endl;			j += n;		}		else {			j++;		}	}	if (!tag)		cout << "Keep going..." << endl;	return 0;}