python/TangDou/CSP-J/AcWingTraining/T1/442.md

## <20>Ŷӽ<C5B6>ˮ


### һ<><D2BB>ԭ<EFBFBD><D4AD>
https://www.luogu.com.cn/problem/P1190

P1190 [NOIP 2010 <20>ռ<EFBFBD><D5BC><EFBFBD>] <20><>ˮ<EFBFBD><CBAE><EFBFBD><EFBFBD>

```cpp {.line-numbers}
#include <bits/stdc++.h>
using namespace std;
const int MAX_N = 10010; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
const int MAX_M = 110;   // <20><><EFBFBD><EFBFBD>ˮ<EFBFBD><CBAE>ͷ<EFBFBD><CDB7>
int n, m;                // n: ͬѧ<CDAC><D1A7><EFBFBD><EFBFBD>, m: ˮ<><CBAE>ͷ<EFBFBD><CDB7><EFBFBD><EFBFBD>
int w[MAX_N];            // ÿλͬѧ<CDAC>Ľ<EFBFBD>ˮ<EFBFBD><CBAE>
int taps[MAX_M];         // ÿ<><C3BF>ˮ<EFBFBD><CBAE>ͷ<EFBFBD>ĵ<EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>
int main() {
    cin >> n >> m;

    // ģ<><C4A3><EFBFBD><EFBFBD>ˮ<EFBFBD><CBAE><EFBFBD><EFBFBD>
    for (int i = 0; i < n; i++) {
        cin >> w[i];

        // <20>ҵ<EFBFBD><D2B5><EFBFBD><EFBFBD>Ƚ<EFBFBD><C8BD><EFBFBD><EFBFBD><EFBFBD>ˮ<EFBFBD><CBAE>ͷ
        int min_tap = 0;
        for (int j = 1; j < m; j++)
            if (taps[j] < taps[min_tap])
                min_tap = j;
        // <20><>i<EFBFBD><69>ͬѧ<CDAC>Ľ<EFBFBD>ˮ<EFBFBD><CBAE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƚ<EFBFBD><C8BD><EFBFBD><EFBFBD><EFBFBD>ˮ<EFBFBD><CBAE>ͷ
        taps[min_tap] += w[i];
    }
    // <20>ҵ<EFBFBD><D2B5><EFBFBD><EFBFBD><EFBFBD>ˮ<EFBFBD><CBAE>ͷ<EFBFBD><CDB7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ľ<EFBFBD><C4BD><EFBFBD>ʱ<EFBFBD><CAB1>
    int result = 0;
    for (int i = 0; i < m; i++)
        result = max(result, taps[i]);

    cout << result << endl;
    return 0;
}
```

### <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>2<EFBFBD><32>һ<EFBFBD><D2BB>ˮ<EFBFBD><CBAE>ͷǰ<CDB7>Ŷӽ<C5B6>ˮ<EFBFBD><CBAE>
https://www.acwing.com/problem/content/description/5945/

```cpp {.line-numbers}
#include <bits/stdc++.h>
using namespace std;
const int N = 1005;

struct Node {
    int num;
    int sum;
} a[N];
bool cmp(Node x, Node y) {
    if (x.sum == y.sum)
        return x.num < y.num;
    return x.sum < y.sum;
}
int main() {
    int n;
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> a[i].sum;
        a[i].num = i + 1;
    }
    sort(a, a + n, cmp);
    double temp = 0.00;
    for (int i = 0; i < n; i++) {
        cout << a[i].num << " ";
        temp += (n - (i + 1)) * a[i].sum;
    }
    cout << endl;
    printf("%.2f", temp / n * 1.00);
    return 0;
}
```


### <20>ġ<EFBFBD><C4A1><EFBFBD>ѧ֤<D1A7><D6A4>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>ŵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>Ԫ<EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊʲô<EFBFBD>Ǵ<EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>

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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>裺

$a_i$ <20><> $b_i$<24><>$a_i<b_i$

<EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ԫ<EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>

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##<23><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>$a_i<b_i$<24>ó<EFBFBD> $t_1<t_2$<24><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>ʽ<EFBFBD>ӡ<EFBFBD><D3A1><EFBFBD>$a_i+a_i+b_i<b_i+b_i+a_i$;

<EFBFBD>ٻ<EFBFBD><EFBFBD>򲻵<EFBFBD>ʽ<EFBFBD>ó<EFBFBD>$a_i<b_i$

<EFBFBD><EFBFBD><EFBFBD>ǵó<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ۣ<EFBFBD>**<2A><>$a_i$<24><>$b_i$ǰ<><C7B0>ʱ<EFBFBD><CAB1>ʱ<EFBFBD><CAB1>Ϊ<EFBFBD><CEAA>Сֵ**<2A><>

<EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>ƻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>壬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϣ<EFBFBD><EFBFBD><EFBFBD>ôԽС<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>Խ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD>棬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ԽС<EFBFBD><EFBFBD>