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误差问题In Reply To:16ms与0ms就是一个语句的差别? Posted by:gtzygtzy at 2009-08-03 15:00:39 忘了某个题,相同的代妈跑两遍一次0ms一次32ms,评测系统有误差的 > #include<iostream> > using namespace std; > int t[20]; > int sum[20]; > void init() > { > int i,j; > t[0]=1; > t[1]=1; > for(i=2;i<=19;i++) > { > t[i]=0; > for(j=0;j<i;j++) > t[i]+=t[j]*t[i-1-j]; > } > sum[1]=1; > //sum[0]=0;删了以后0MS,不删16MS > for(i=2;i<=19;i++) sum[i]=sum[i-1]+t[i]; > } > void printout(int x,int num) > { > if(x==1) {printf("X");return ;} > if(x==2) > { > if(num==1) printf("X(X)"); > else printf("(X)X"); > return ; > } > int i,re=0; > for(i=0;i<x-1;i++) > { > if(re+t[i]*t[x-1-i]>=num) break; > re+=t[i]*t[x-1-i]; > } > if(i==0) > { > printf("X("); > printout(x-1-i,num-re); > printf(")"); > return ; > } > if(x-i-1==0) > { > printf("("); > printout(i,num-re); > printf(")X"); > return ; > } > int t1,t2; > t1=(num-re-1)/t[x-1-i]+1; > t2=(num-re)%t[x-1-i]; > printf("("); > printout(i,t1); > printf(")X("); > printout(x-1-i,t2); > printf(")"); > } > int main() > { > int n,i; > init(); > while(scanf("%d",&n)) > { > if(n==0) break; > for(i=1;;i++)if(sum[i]>=n) break; > printout(i,n-sum[i-1]); > printf("\n"); > } > return 0; > } Followed by: Post your reply here: |
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