#include<iostream>

using namespace std;

int find(int x,int y,int n){

int num=x;

if(n-x+1<num) num=n-x+1;

if(y<num) num=y;

if(n-y+1<num) num=n-y+1;

return num;

}

int main(){

freopen("matrixc.in","r",stdin);

freopen("matrixc.out","w",stdout);

int sum=1;

int n,i,j;

cin>>n>>i&

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该题解等待再次审核