Interactive Guide

Use this for problems that require round-by-round I/O with the judge.

Overview

• Print exactly one command per round.
• Flush immediately after every printed command.
• Read exactly what the protocol says, no more and no less.
• Treat command words as case-insensitive unless a statement says otherwise.

Python (pypy3)

import sys

for _ in range(500):
    cmd = "FORWARD"
    print(cmd)
    sys.stdout.flush()
    view = []
    for _ in range(5):
        line = sys.stdin.readline().rstrip("\n")
        if line == "":
            sys.exit(0)
        view.append(line)

C++

#include <bits/stdc++.h>
using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    for (int round = 0; round < 500; round++) {
        cout << "FORWARD\n";
        cout.flush();

        vector<string> view(5);
        for (int i = 0; i < 5; i++) {
            if (!getline(cin >> ws, view[i])) {
                return 0;
            }
        }
    }
    return 0;
}

Common Mistakes

• No flush after output.
• Printing extra spaces or debug lines to stdout.
• Reading fewer or more lines than the protocol requires.

If the judge waits forever, your process can hit idle limit.