app.py

import gradio as gr
import os
from random import random


flag = os.getenv("FLAG")


def main(request: str) -> str:
    you = float(request)
    
    N = 10000
    enemys = [random() * 2 * you for _ in range(N)]
    
    win_count = 0
    for r in enemys:
        if not (you <= r):
            win_count += 1
    
    if win_count == N:
        return f"勝利! pgctf{flag}"
    else:
        return f"あなたは {win_count} 人に勝ちました。"
        


demo = gr.Interface(
    fn=main,
    inputs=[
        gr.Textbox(label="request"),
    ],
    outputs=[
        gr.Textbox(label="response"),
    ],
)

demo.launch()