知识点：

分支控制：分支控制

#include <iostream>
using namespace std;

int main() {
    int distance = 0;
    char traffic = ' ';
    int time_walk = 0;
    int time_taxi = 0;

    cin >> distance;

    time_walk = distance / 1;
    time_taxi = distance / 10 + 10;

    if (time_walk < time_taxi ) {
        traffic = 'w';
    } else {
        traffic = 'v';
    }

    cout << traffic;

    return 0;
}