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【UVA】11040 - Add bricks in the wall(找规律)

一道找规律的题,可以看出,大的三角形可以划分成好多个三层的三角形:

【x】

【a】【x-a】

【y】 【    】【z】

  这里面xyz都已知,所以可以求出a = (x + y - z ) /2

1404361511040Add bricks in the wallAcceptedC++0.0192014-08-15 06:02:50

#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
#include<vector>
#include<stack>
#include<queue>
#include<map>
#include<set>
#include<list>
#include<cmath>
#include<string>
#include<sstream>
#include<ctime>
using namespace std;
#define _PI acos(-1.0)
#define INF (1 << 10)
#define esp 1e-9
typedef long long LL;
typedef unsigned long long ULL;
typedef pair<int,int> pill;
/*===========================================
===========================================*/
#define MAXD 20 + 10
int Grap[MAXD][MAXD];
int main(){
    int T;
    scanf("%d",&T);
    while(T--){
        for(int i = 1 ; i <= 9 ; i+=2){
            for(int j = 1 ; j <= i ; j += 2)
                scanf("%d",&Grap[i][j]);
        }
        for(int i = 1 ; i <= 9 ; i++){
            for(int j = 1 ; j <= i ; j++){
                if(i & 1){ /*如果是奇数行*/
                     if(j % 2 == 0){
                         Grap[i][j] = Grap[i - 1][j - 1] - Grap[i][j - 1];
                     }
                }
                else{/*如果是偶数行*/
                   if(j & 1){
                      Grap[i][j] = (Grap[i - 1][j] + Grap[i + 1][j] - Grap[i + 1][j + 2] )/ 2;
                   }
                   else{
                      Grap[i][j] = Grap[i - 1][j - 1] - Grap[i][j - 1];
                   }
                }
            }
        }
        for(int i = 1 ; i <= 9 ; i++){
            for(int j = 1 ; j <= i ; j++){
                printf("%d",Grap[i][j]);
                if(j < i)
                    printf(" ");
            }
            printf("\n");
        }
    }
    return 0;
}