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“玲珑杯”ACM比赛 Round #18 A 暴力水 C dp

“玲珑杯”ACM比赛 Round #18

计算几何你瞎暴力

题意:如果从一个坐标为 (x1,y1,z1)的教室走到(x2,y2,z2)的距离为 |x1−x2|+|y1−y2|+|z1−z2|。那么有多少对教室之间的距离是不超过R的呢?

tags:坐标范围很小,瞎暴力

#include<iostream>#include<cstdio>#include<cstdlib>#include<algorithm>#include<cstring>#include<string>#include<cmath>#include<queue>#include<stack>#include<map>#include<bitset>#include<vector>#include<set>#include<list>using namespace std;#pragma comment(linker, "/STACK:102400000,102400000")#define rep(i,a,b) for (int i=a;i<=b;i++)#define per(i,b,a) for (int i=b;i>=a;i--)#define mes(a,b)  memset(a,b,sizeof(a))#define INF 0x3f3f3f3f#define MP make_pair#define PB push_back#define fi  first#define se  secondtypedef long long ll;const int N = 205;int n, q, T, r;ll   mp[15][15][15], ans[N], ans1[N];bool vis[15][15][15];int Dis(int x1, int y1, int z1, int x2, int y2, int z2){    return abs(x1-x2)+abs(y1-y2)+abs(z1-z2);}int main(){    scanf("%d", &T);    while(T--)    {        mes(mp, 0);  mes(vis, false);  mes(ans, 0);  mes(ans1, 0);        scanf("%d %d", &n, &q);        int x, y, z;        rep(i,1,n)        {            scanf("%d %d %d", &x, &y, &z);            ++mp[x][y][z];        }        rep(cx,0,10) rep(cy,0,10) rep(cz,0,10)        {            vis[cx][cy][cz]=1;            if(mp[cx][cy][cz])            {                rep(tx,0,10) rep(ty,0,10) rep(tz,0,10)                    if(mp[tx][ty][tz] && vis[tx][ty][tz]==0)                {                    int d= abs(cx-tx)+abs(cy-ty)+abs(cz-tz);                    ans[d]+= (mp[cx][cy][cz]*mp[tx][ty][tz]);                }                ans[0]+= (mp[cx][cy][cz]*(mp[cx][cy][cz]-1)/2);            }        }        rep(i,0,N-1) ans1[i]= ans1[i-1]+ans[i];        rep(i,1,q)        {            scanf("%d", &r);            if(r>=N) printf("%lld\n", ans1[N-1]);            else printf("%lld\n", ans1[r]);        }    }    return 0;}

图论你先敲完模板

题意:现在这个操场上有n个可以休息的点,他们的坐标分别为x1,x2...xn(xi≤xi+1),HH刚开始在 x1,并且他只能在这些点休息,在中途不能停下来,否则会因为旁边的音浪太强而被晃到。如果HH连续跑一段长度为l的距离,那么他将会消耗2^l+a的能量(a为HH的可爱值)。现在给你这些点的坐标,请帮HH计算他跑到xn点所需要消耗的能量最少是多少。

tags:2^len这个数在这个题不会超过long long 范围,故到 xi点时,最多往前面跑 60米,可以直接暴力 dp。

#include<iostream>#include<cstdio>#include<cstdlib>#include<algorithm>#include<cstring>#include<string>#include<cmath>#include<queue>#include<stack>#include<map>#include<bitset>#include<vector>#include<set>#include<list>using namespace std;#pragma comment(linker, "/STACK:102400000,102400000")#define rep(i,a,b) for (int i=a;i<=b;i++)#define per(i,b,a) for (int i=b;i>=a;i--)#define mes(a,b)  memset(a,b,sizeof(a))#define INF 0x3f3f3f3f#define MP make_pair#define PB push_back#define fi  first#define se  secondtypedef long long ll;const int N = 100005;int T, n, a, k, x[N];ll  dp[N];int main(){    scanf("%d", &T);    while(T--)    {        scanf("%d %d", &n, &a);        rep(i,1,n) scanf("%d", &x[i]);        k=unique(x+1, x+1+n)-(x+1);        mes(dp, 63);    dp[1]=0;        rep(i,2,k)        {            int x1=x[i];            per(j,i,1)            {                int x2=x[j];                if(x1-x2>60) break;                dp[i]=min(dp[i], dp[j]+(1LL<<(x1-x2))+a);            }        }        printf("%lld\n", dp[k]);    }    return 0;}

“玲珑杯”ACM比赛 Round #18 A 暴力水 C dp