[高精度乘法]BZOJ 1754 [Usaco2005 qua]Bull Math

模板题目，练练手~

#include <iostream>
#include <algorithm>
#include <cstring>
#include <cstdio>
using namespace std;int s1[2333];
int s2[2333];
int Out[2333];
string one,two;void Debug(){for(int i=0;i<one.length();i++){printf("%d",s1[i]);}printf("\n");for(int i=0;i<two.length();i++){printf("%d",s2[i]);}
}int main(){cin>>one;cin>>two;if(one.length() < two.length() ) swap(one,two);    for(int i=0;i<one.length();i++){s1[i] = one[i] - '0';}for(int i=0;i<two.length();i++){s2[i] = two[i] - '0';}for(int i=two.length()-1;i>=0;i--){int pos = two.length() - i - 1;for(int j=one.length()-1;j>=0;j--,pos++){Out[pos]+=s2[i]*s1[j];Out[pos+1] += Out[pos] / 10;Out[pos]%=10;}/*for(int fuck = 4;fuck>=0;fuck--) printf("%d",Out[i]);printf("\n");*/}int i  = one.length() + two.length();while( Out[i]==0 ) i--;for(;i>=0;i--) printf("%d",Out[i]);return 0;//for(int i=one.length();)
}