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33 lines
1.1 KiB
C++
33 lines
1.1 KiB
C++
#define _CRT_SECURE_NO_WARNINGS
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#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
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#include <bits/stdc++.h>
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using namespace std;
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const int N = 105;
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int dis[N][N], v[N];
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int main()
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{
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for (int t = 1, x, y; scanf("%d%d", &x, &y), x | y; t++)
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{
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memset(dis, 0x3f, sizeof(dis));
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memset(v, 0, sizeof(v));
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do
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{
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v[x] = v[y] = 1;
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dis[x][y] = 1;
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scanf("%d%d", &x, &y);
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} while (x | y);
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for (int i = 0; i < N; i++)
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dis[i][i] = 0;
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for (int k = 0; k < N; k++)
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for (int i = 0; i < N; i++)
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for (int j = 0; j < N; j++)
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dis[i][j] = min(dis[i][j], dis[i][k] + dis[k][j]);
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long long sum = 0, cnt = accumulate(v, v + N, 0);
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for (int i = 0; i < N; i++)
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for (int j = 0; j < N; j++)
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if (dis[i][j] != 0x3f3f3f3f)
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sum += dis[i][j];
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printf("Case %d: average length between pages = %.3lf clicks\n", t, 1.0 * sum / cnt / (cnt - 1));
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}
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return 0;
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} |