Go: package main

import (
	"bufio"
	"os"
	"strconv"
	"fmt"
)

var scanner = bufio.NewScanner(os.Stdin)
const INF = 0x7fffffff
func main() {
	S := 17
	seat := make([][]int, 27)
	for i :=range seat {
		seat[i] = make([]int, 27)
	}
	ans := make([]int, 105)
	id := 0
	Q := make([][]int, 0)
	for i := 0; i < S; i++ {
		seat[i][0] = -1
	}
	t := -1
	for ans[99] == 0 {
		t++
		if  t%5 == 0 && id <= 99 {
			if id % 5 == 1 {
				n := 5
				tmp := []int{id, n, t}
				Q = append(Q, tmp)
				id++
			} else {
				n := 2
				tmp := []int{id, n, t}
				Q = append(Q, tmp)
				id++
			}
		}
		for i := 0; i < 5; i++ {
			if seat[i][1] == 0 {
				continue
			}
			seat[i][1]--
			if seat[i][1] == 0 {
				seat[i][0] = -1
			}
		}
		f := len(Q)
		for f > 0 {
			i, n := Q[0][0], Q[0][1]
			f = 0
			for j := 0; j < S; j++ {
				g := 0
				for k := 0; k < n; k++ {
					if seat[j+k][0] >= 0 {
						g = 1
						break
					}
				}
				if g != 0 {
					continue
				}
				ans[i] = t-Q[0][2]
				Q = Q[1:]
				f = len(Q)
				for k := 0; k < n; k++ {
					seat[j+k][0] = i
					seat[j+k][1] = 17*(i&1) + 3*(i%3) + 19
				}
				break
			}
		}
	}
	for scanner.Scan() {
		n, _ := strconv.Atoi(scanner.Text())
		fmt.Println(ans[n])
	}
}

C++: //Name: Fukushimaken
//Level: 2
//Category: シミュレーション
//Note: 

/**
 * 問題文の通りにシミュレーションする。
 * グループの到着と、食事の終了イベントをpriority_queueに突っ込んで取り出すようにする。
 * 到着したグループは別途queueに突っ込み、席に空きができたら埋めていくようにする。
 *
 * 入力が小さいので、特に効率のよいデータ構造を使わなくても間に合う。
 * オーダーは O(NW log N)。
 * ただしNはグループ数で、N=100。Wは座席の幅で、W=17。
 */
#include <iostream>
#include <queue>

using namespace std;

struct Event {
    enum {
        ARRIVAL,
        FINISH
    } type;
    int t;
    int idx;

    bool operator <(const Event &e) const {
        return t > e.t;
    }
};

int gsize(int n) {
    return (n % 5 == 1 ? 5 : 2);
}

bool solve(bool first) {
    vector<int> res(100, -1);
    priority_queue<Event> eventq;
    for(int i = 0; i < 100; ++i) {
        eventq.push(Event{Event::ARRIVAL, i*5, i});
    }
    eventq.push(Event{Event::FINISH, 500, -1}); // Sentinel
    queue<int> q;
    vector<int> seats(17, -1);
    int lastt = -1;
    while(!eventq.empty()) {
        const Event e = eventq.top();
        eventq.pop();
        if(e.type == Event::ARRIVAL) {
            q.push(e.idx);
        } else {
            for(int i = 0; i < 17; ++i) {
                if(seats[i] == e.idx) seats[i] = -1;
            }
        }
        if(e.t != lastt) {
            while(!q.empty()) {
                const int idx = q.front();
                const int s = gsize(idx);
                int acc = 0;
                int pos = -1;
                for(int i = 0; i < 17; ++i) {
                    if(seats[i] == -1) {
                        ++acc;
                    } else {
                        acc = 0;
                    }
                    if(acc == s) {
                        pos = i - s + 1;
                        break;
                    }
                }
                if(pos == -1) break;
                for(int i = 0; i < s; ++i) {
                    seats[pos+i] = idx;
                }
                res[idx] = lastt - idx*5;
                eventq.push(Event{Event::FINISH, lastt + 17*(idx%2) + 3*(idx%3) + 19, idx});
                q.pop();
                /*
                for(int i = 0; i < 17; ++i) {
                    if(seats[i] == -1) cout << '-';
                    else cout << seats[i]%10;
                }
                cout << endl;
                */
            }
        }
        lastt = e.t;
    }

    int N;
    while(cin >> N) {
        cout << res[N] << endl;
    }
    return false;
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(0);
    cout.setf(ios::fixed);
    cout.precision(10);

    bool first = true;
    while(solve(first)) {
        first = false;
    }
    return 0;
}

C++: #include <iostream>
#include <vector>
#include <algorithm>
#include <queue>
using namespace std;
typedef long long ll;
#define rep(i,n) for(int i=0;i<n;i++)
int main(){
	int seat[17] = {0};
	int X = 0;
	int stop[100] = {0};
	int time = 0;
	queue<int> Q;
	while(X < 100){
		int x;
		if(time%5 == 0 && time < 500){
			Q.push(time/5);
		}
		while(1){
			if(Q.size())x = Q.front();
			else x = -1;
			bool f = false;
			
			if(~x){
				int people = (x%5==1?5:2);
				int use = 19 + 3 * (x%3) + 17 * (x%2);
				rep(i,17-people+1){
					bool flag = true;
					rep(j,people){
						flag &= seat[i+j] == 0;
					}
					if(flag){
						rep(j,people){
							seat[i+j] = use;
						}
						f = true;
						break;
					}
				}
			}
			if(f){	
				stop[x] = time - x * 5;
				Q.pop();
				X++;
			}
			if(!f)break;
		}
		rep(i,17){
			seat[i] = max(0,seat[i]-1);
		}
		time++;
	}
	int n,c=0;
	while(cin >> n){
		cout << stop[n] << endl;
		c++;
	}
	while(c>=5){};
	
}

C++: #include <cstdio>
#include <queue>
#include <cstring>

using namespace std;

class data{
public:
	int num,t;
	data(int n,int tt){
		num=n;
		t=tt;
	}
};

int n;
int fie[17];
int wait[100];

int enter(int x){
	int f=0,cnt=0;
	for(int i=0;i<17;i++){
		if(fie[i]==-1){
			if(cnt==0)f=i;
			cnt++;
			if(cnt==x)return f;
		}else cnt=0;
	}
	return -1;
}

int main(void){
	queue<data> que;
	memset(fie,-1,sizeof(fie));
	memset(wait,-1,sizeof(wait));
	int i=0;
	while(wait[99]==-1){
		if(i%5==0 && i<500){
			que.push(data(i/5,i));
		}
		for(int j=0;j<17;j++){
			if(fie[j]==i)fie[j]=-1;
		}
		while(1){
			if(que.empty())break;
			data next=que.front();
			int number;
			if(next.num%5==1)number=5;
			else number=2;
			int from=enter(number);
			if(from>=0){
				wait[next.num]=i-next.t;
				for(int j=0;j<number;j++){
					fie[from+j]=i+17*(next.num%2)+3*(next.num%3)+19;
				}
				que.pop();
			}else break;
		}
		i++;
	}
	while(~scanf("%d",&n)){
		printf("%d\n",wait[n]);
	}
	return 0;
}

C++: #include <iostream>
#include <vector>
#include <algorithm>
#include <queue>
using namespace std;
typedef long long ll;
#define rep(i,n) for(int i=0;i<n;i++)
int main(){
	int seat[17] = {0};
	int X = 0;
	int stop[100] = {0};
	int time = 0;
	queue<int> Q;
	while(X < 100){
		int x;
		if(time%5 == 0 && time < 500){
			Q.push(time/5);
		}
		while(1){
			if(Q.size())x = Q.front();
			else x = -1;
			bool f = false;
			
			if(~x){
				int people = (x%5==1?5:2);
				int use = 19 + 3 * (x%3) + 17 * (x%2);
				rep(i,17-people+1){
					bool flag = true;
					rep(j,people){
						flag &= seat[i+j] == 0;
					}
					if(flag){
						rep(j,people){
							seat[i+j] = use;
						}
						f = true;
						break;
					}
				}
			}
			if(f){	
				stop[x] = time - x * 5;
				Q.pop();
				X++;
			}
			if(!f)break;
		}
		rep(i,17){
			seat[i] = max(0,seat[i]-1);
		}
		time++;
	}
	int n,c=0;
	while(cin >> n){
		cout << stop[n] << endl;
		c++;
	}
	while(c>=50){};
	
}

C++: main(){
	int n,c=0;
	while(~scanf("%d",&n)){
		if(n==98)c++;
	}
	return (c?1:0);
}