#include <bits/stdc++.h>

using namespace std;

// 例4、穿越沙漠
// https://blog.csdn.net/weixin_43983838/article/details/88125782
int main() {
    int dis = 500, oil = 500;
    int k = 1;
    //因为不确定循环次数，又至少做一次，所以我们用do_while
    do {
        printf("储油点%d：距离出发点%5d,", k, 1000 - dis);
        printf("储油量%5dL\n", oil);
        k = k + 1;
        dis = dis + 500 / (2 * k - 1);
        oil = 500 * k;
    } while (dis < 1000);

    // 再计算出发点的储油量
    oil = 500 * (k - 1) + (1000 - dis) * (2 * k - 1);
    printf("储油点%d：距离出发点%5d,储油量%5dL\n", k, 0, oil);
    return 0;
}