OJ-Problems-Source/HDOJ/2763_autoAC.cpp

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#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
const int N = 21;
const int M = 20;
int ans[21][N] = {{1}};
int BigNumPow(int x[], int n);
int BigNumCopy(int x[], int y[]);
int BigNumMul(int x[], int y[]);
int BigNumAdd(int x[], int y[]);
int main()
{
int n, t;
int i, j;
int BigNum[N], BigPow[N], BigStep[N], BigCycle[N], tem[N];
memset(BigNum, 0, sizeof(BigNum));
memset(BigPow, 0, sizeof(BigPow));
memset(BigStep, 0, sizeof(BigStep));
memset(BigCycle, 0, sizeof(BigCycle));
BigNum[0] = 2;
BigStep[0] = 6;
BigStep[1] = 1;
BigPow[0] = 1;
BigCycle[0] = 4;
for(i = 1; i < 20; ++i)
{
while(BigNum[i] == 0 || BigNum[i] > 2)
{
BigNumMul(BigNum, BigStep);
BigNumAdd(BigPow, BigCycle);
}
BigNumCopy(ans[i], BigPow);
BigNumPow(BigStep, 5);
memset(tem, 0, sizeof(tem));
for(j = 0; j < M; ++j)
{
tem[j] += BigCycle[j] * 5;
if(tem[j] > 9)
{
tem[j + 1] += tem[j] / 10;
tem[j] = tem[j] % 10;
}
}
BigNumCopy(BigCycle, tem);
}
scanf("%d", &t);
for(j = 1; j <= t; ++j)
{
scanf("%d", &n);
printf("%d %d ", j, n);
--n;
i = M;
while(ans[n][i] == 0)
--i;
while(i >= 0)
printf("%d", ans[n][i--]);
printf("\n");
}
return 0;
}
int BigNumPow(int x[], int n)
{
int tmp[N];
int res[N];
BigNumCopy(tmp, x);
memset(res, 0, sizeof(res));
res[0] = 1;
while(n > 0)
{
if(n & 1)
{
BigNumMul(res, tmp);
}
BigNumMul(tmp, tmp);
n = n >> 1;
}
BigNumCopy(x, res);
return 0;
}
int BigNumCopy(int x[], int y[])
{
int i;
for(i = 0; i < N; ++i)
x[i] = y[i];
return 0;
}
int BigNumMul(int x[], int y[])
{
int i, j, k;
int tem[N];
int res[N];
memset(res, 0, sizeof(res));
for(i = 0; i < M; ++i)
{
memset(tem, 0, sizeof(tem));
for(k = i, j = 0; k < M; ++j, ++k)
{
tem[k] += y[i] * x[j];
tem[k + 1] += tem[k] / 10;
tem[k] = tem[k] % 10;
}
BigNumAdd(res, tem);
}
BigNumCopy(x, res);
return 0;
}
int BigNumAdd(int x[], int y[])
{
int i;
for(i = 0; i < M; ++i)
{
x[i] += y[i];
if(x[i] > 9)
{
x[i] -= 10;
++x[i + 1];
}
}
return 0;
}