http://acm.bnu.edu.cn/v3/contest_show.php?cid=5772#problem/I
给定m个长度为n的DNA序列,求一个DNA序列,使其到所有序列的总差异尽量小,输出字典序最小。
一次看每一位的m个字符,贪心选取出现次数最多的,优先字典序小的.
#include <cstdio> #include <cstdlib> #include <cmath> #include <cstring> #include <string> #include <queue> #include <map> #include <iostream> #include <sstream> #include <algorithm> using namespace std; #define RD(x) scanf("%d",&x) #define RD2(x,y) scanf("%d%d",&x,&y) #define RD3(x,y,z) scanf("%d%d%d",&x,&y,&z) #define clr0(x) memset(x,0,sizeof(x)) #define clr1(x) memset(x,-1,sizeof(x)) typedef long long LL; struct DNA { int a,c,g,t; }d[1005]; int main() { int t,n,m,i,j,ans,max; char s[1005]; RD(t); while(t--) { RD2(n,m); clr0(d); for(i=0;i<n;i++){ scanf("%s",s); for(j=0;j<m;j++) if(s[j]=='A') d[j].a++; else if(s[j]=='C') d[j].c++; else if(s[j]=='G') d[j].g++; else d[j].t++; } for(ans=i=0;i<m;i++) { s[i]='A';max=d[i].a; if(d[i].c>max) s[i]='C',max=d[i].c; if(d[i].g>max) s[i]='G',max=d[i].g; if(d[i].t>max) s[i]='T',max=d[i].t; ans+=n-max; } s[m]=0; printf("%s\n%d\n",s,ans); } return 0; }