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再次感觉到Optimize的力量……#include<iostream> #include<algorithm> using namespace std; int i,j,n,l,item[100005],bc,sp; bool opt; bool cmp(const int a,const int b) { return a>b; } int main() { scanf("%d%d",&n,&l); for(i=0;i<n;i++)scanf("%d",item+i); sort(item,item+n,cmp); bc=n-1; sp=0; do{ opt=false; for(i=sp;i<bc;i++){ if(item[i]+item[bc]<=l){ opt=true; bc--; sp=i+1; //有胆的去掉这一句试试看,呵呵 break; } } }while(opt==true); printf("%d\n",bc+1); } Followed by:
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