USACO 1.2-Transformations
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/*ID: m1590291TASK: transformLANG: C++*/#include <iostream>#include <fstream>#include <algorithm>#define MAX 20using namespace std;int n;char a[MAX][MAX],b[MAX][MAX];bool check() //检查是否相等{ bool flag=true;for(int i=0;i<n;i++)for(int j=0;j<n;j++)if(a[i][j]!=b[i][j]) return false; return true;}void to90() //旋转90度{ char tmp[MAX][MAX];for(int i=0;i<n;i++)for(int j=0;j<n;j++)tmp[j][n-i-1]=a[i][j];for(int i=0;i<n;i++)for(int j=0;j<n;j++)a[i][j]=tmp[i][j];}void Ref() //中央铅垂线翻转{char tmp[MAX][MAX];for(int i=0;i<n;i++)for(int j=0;j<n;j++)tmp[i][n-j-1]=a[i][j];for(int i=0;i<n;i++)for(int j=0;j<n;j++)a[i][j]=tmp[i][j];}int main(){ ifstream fin ("transform.in"); ofstream fout ("transform.out"); while(fin>>n) { int flag=1,ans=100; if(n<1 || n>10) break; for(int i=0;i<n;i++) fin>>a[i]; for(int i=0;i<n;i++) fin>>b[i]; for(int i=1;i<4;i++){ to90(); if(check() == true) ans=min(ans,i); } to90(); //再次旋转90度,使图形变回原样 if(ans>4){ Ref(); if(check() == true) ans=4; else{ for(int i=1;i<4;i++){ to90(); if(check() == true) ans=5; } } } if(ans>5){ if(check() == true) ans=6; else ans=7; } fout<<ans<<endl; } return 0;}
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