HDU 1432 Lining Up (POJ 1118)

it2025-09-12  137

枚举,枚举点 复杂度为n^3。

还能够枚举边的,n*n*log(n)。

POJ 1118 要推断0退出。

#include<cstdio> #include<cstring> #include<string> #include<queue> #include<algorithm> #include<map> #include<stack> #include<iostream> #include<list> #include<set> #include<vector> #include<cmath> #define INF 0x7fffffff #define eps 1e-8 #define LL long long #define PI 3.141592654 #define CLR(a,b) memset(a,b,sizeof(a)) #define FOR(i,a,n) for(int i= a;i< n ;i++) #define FOR0(i,a,b) for(int i=a;i>=b;i--) #define pb push_back #define mp make_pair #define ft first #define sd second #define sf scanf #define pf printf #define acfun std::ios::sync_with_stdio(false) #define SIZE 700+1 using namespace std; struct lx {     int x,y; }p[SIZE]; int n; int main() {     while(~sf("%d",&n))     //while(~sf("%d",&n),n)     {         FOR(i,0,n)         sf("%d%d",&p[i].x,&p[i].y);         int ans=0;         int maxn=0;         FOR(i,0,n)         {             FOR(j,i+1,n)             {                 maxn=0;                 FOR(k,j+1,n)                 {                     if((p[j].x-p[i].x)*(p[k].y-p[j].y)==(p[j].y-p[i].y)*(p[k].x-p[j].x))                         maxn++;                 }                 ans=max(maxn,ans);             }         }         pf("%d\n",ans+2);     } }

转载于:https://www.cnblogs.com/bhlsheji/p/4256272.html

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