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狂搜,30多MS,AC了,在hdu里面却WA了,怎么这样#include<stdio.h> int s1[30002],s2[30002],c[30002]; int main() { int i,j,N,min,temp; while(scanf("%d",&N)!=EOF) { s1[0]=0; s2[0]=0; for(i=1;i<=N;i++) { scanf("%d",&c[i]); if(c[i]==1) { s1[i]=s1[i-1]+1; s2[i]=s2[i-1]; } else { s2[i]=s2[i-1]+1; s1[i]=s1[i-1]; } } min=100000; for(i=1;i<N;i++) { temp=s2[i]+s1[N]-s1[i]; if(temp<min) min=temp; } if(min>s1[N]) min=s1[N]; //把很少部分的1改为2即可; if(min>s2[N]) min=s2[N]; //把很少部分的2改为1即可; printf("%d\n",min); } } /* 7 2 1 1 1 2 2 1 ==>2; 11 2 2 2 1 1 1 1 1 2 1 1 ==>4; */ Followed by:
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