【题目链接】:http://hihocoder.com/problemset/problem/1494

【题意】

【题解】



显然只要记住每一行的各个砖头的间隔处的坐标有多少个就好了;

->也就对应了从这个地方画一条竖线上去,能少碰到多少个砖头;

取少碰到的砖头数的最大值;

然后用N减去它就好;

直接用map搞



【完整代码】

#include <bits/stdc++.h>
using namespace std;
#define lson l,m,rt<<1
#define rson m+1,r,rt<<1|1
#define LL long long
#define rep1(i,a,b) for (int i = a;i <= b;i++)
#define rep2(i,a,b) for (int i = a;i >= b;i--)
#define mp make_pair
#define ps push_back
#define fi first
#define se second
#define rei(x) scanf("%d",&x)
#define rel(x) scanf("%lld",&x)
#define ref(x) scanf("%lf",&x) typedef pair<int, int> pii;
typedef pair<LL, LL> pll; const int dx[9] = { 0,1,-1,0,0,-1,-1,1,1 };
const int dy[9] = { 0,0,0,-1,1,-1,1,-1,1 };
const double pi = acos(-1.0);
const int N = 110; int n;
map <int, int> dic;
vector<int> v; int main()
{
//freopen("F:\\rush.txt", "r", stdin);
rei(n);
rep1(i, 1, n)
{
int num = 0,tot=0;
rei(num);
rep1(j, 1, num)
{
int x;
rei(x);
tot += x;
if (j == num)
continue;
if (!dic[tot])
{
v.ps(tot);
}
dic[tot]++;
}
}
int ma = 0;
int len = v.size();
rep1(i, 0, len - 1)
{
ma = max(ma, dic[v[i]]);
}
printf("%d\n", n - ma);
//printf("\n%.2lf sec \n", (double)clock() / CLOCKS_PER_SEC);
return 0;
}
05-15 09:09