codeforce Anton and Classes

本文介绍了一种计算两个线段集合间最大距离的方法。通过寻找各集合中左端点最小和右端点最大的线段,进而计算这些线段间的距离来确定最大距离。

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题意:给你两个线段集合A,B,求它们之间的最大距离。距离的定义为:如果相交,则为0。否则,为: 右边线段的L-左边线段的R.
所以最大距离 为:A.L(max) - B.R(min) or B.L(max) - A.R(min);

#include <bits\stdc++.h>
using namespace std;

struct  point{
    int l;
    int r;
};

struct point a1[200005],a2[200005]; 

int dista(struct point a, struct point b){
    if(a.l > b.l) swap(a,b);
    if(a.r >= b.l) return 0;
    else return fabs((b.l - a.r));
}

int main(){
    int n,m;
    scanf("%d",&n);
    for(int i=0;i<n;i++){
        scanf("%d%d",&a1[i].l,&a1[i].r);
    }
    scanf("%d",&m);
    for(int i=0;i<m;i++){
        scanf("%d%d",&a2[i].l,&a2[i].r);
    }

    struct point minr = a1[0],maxl=a1[0];
    for(int i=1;i<n;i++){
        if(a1[i].r < minr.r) minr = a1[i];
        if(a1[i].l > maxl.l) maxl = a1[i];
    }

    struct point minrr = a2[0],maxll=a2[0];
    for(int i=1;i<m;i++){
        if(a2[i].r < minrr.r) minrr = a2[i];
        if(a2[i].l > maxll.l) maxll = a2[i];
    }

    int dis1 = dista(minr,maxll);
    int dis2 = dista(minrr,maxl);
    printf("%d\n",max(dis1,dis2));

    return 0;
}
### Codeforces Problem or Contest 998 Information For the specific details on Codeforces problem or contest numbered 998, direct references were not provided within the available citations. However, based on similar structures observed in other contests such as those described where configurations often include constraints like `n` representing numbers of elements with defined ranges[^1], it can be inferred that contest or problem 998 would follow a comparable format. Typically, each Codeforces contest includes several problems labeled from A to F or beyond depending on the round size. Each problem comes with its own set of rules, input/output formats, and constraint descriptions. For instance, some problems specify conditions involving integer inputs for calculations or logical deductions, while others might involve more complex algorithms or data processing tasks[^3]. To find detailed information regarding contest or problem 998 specifically: - Visit the official Codeforces website. - Navigate through past contests until reaching contest 998. - Review individual problem statements under this contest for precise requirements and examples. Additionally, competitive programming platforms usually provide comprehensive documentation alongside community discussions which serve valuable resources when exploring particular challenges or learning algorithmic solutions[^2]. ```cpp // Example C++ code snippet demonstrating how contestants interact with input/output during competitions #include <iostream> using namespace std; int main() { int n; cin >> n; // Process according to problem statement specifics } ```
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