PAT_A 1124. Raffle for Weibo Followers (20)

1124. Raffle for Weibo Followers (20)

John got a full mark on PAT. He was so happy that he decided to hold a raffle（抽奖） for his followers on Weibo – that is, he would select winners from every N followers who forwarded his post, and give away gifts. Now you are supposed to help him generate the list of winners.

Input Specification:

Each input file contains one test case. For each case, the first line gives three positive integers M (<= 1000), N and S, being the total number of forwards, the skip number of winners, and the index of the first winner (the indices start from 1). Then M lines follow, each gives the nickname (a nonempty string of no more than 20 characters, with no white space or return) of a follower who has forwarded John’s post.

Note: it is possible that someone would forward more than once, but no one can win more than once. Hence if the current candidate of a winner has won before, we must skip him/her and consider the next one.

Output Specification:

For each case, print the list of winners in the same order as in the input, each nickname occupies a line. If there is no winner yet, print “Keep going…” instead.
Sample Input 1:

9 3 2
Imgonnawin!
PickMe
PickMeMeMeee
LookHere
Imgonnawin!
TryAgainAgain
TryAgainAgain
Imgonnawin!
TryAgainAgain

Sample Output 1:

PickMe
Imgonnawin!
TryAgainAgain

Sample Input 2:

2 3 5
Imgonnawin!
PickMe

Sample Output 2:

Keep going…

分析：这题很简单！一次AC!可是考试的时候，不熟悉考试环境，结果做了整整半小时！
code:

#include<iostream>
#include<vector>
using namespace std;
int M;
int N;
int S;string tmp_s;
vector<string>que;
int main()
{cin>>M>>N>>S;int tmp_a=S-1;bool isNo=true;for(int i=0;i<M;i++){cin>>tmp_s;for(int j=0;j<que.size();j++){if(tmp_s==que.at(j)){tmp_a++;}}if(i==tmp_a){isNo=false;cout<<tmp_s<<endl;que.push_back(tmp_s);tmp_a+=N;}}if(isNo==true)cout<<"Keep going..."<<endl;return 0;
}

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