poj 1163 The Triangle
2016-11-07 21:16
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The Triangle
Description
Figure 1 shows a number triangle. Write a program that calculates the highest sum of numbers passed on a route that starts at the top and ends somewhere on the base. Each step can go either diagonally down to the left or diagonally down to the right.
Input
Your program is to read from standard input. The first line contains one integer N: the number of rows in the triangle. The following N lines describe the data of the triangle. The number of rows in the triangle is > 1 but <= 100. The numbers in the triangle,
all integers, are between 0 and 99.
Output
Your program is to write to standard output. The highest sum is written as an integer.
Sample Input
Sample Output
Time Limit: 1000MS | Memory Limit: 10000K | |
Total Submissions: 46267 | Accepted: 28015 |
7 3 8 8 1 0 2 7 4 4 4 5 2 6 5 (Figure 1)
Figure 1 shows a number triangle. Write a program that calculates the highest sum of numbers passed on a route that starts at the top and ends somewhere on the base. Each step can go either diagonally down to the left or diagonally down to the right.
Input
Your program is to read from standard input. The first line contains one integer N: the number of rows in the triangle. The following N lines describe the data of the triangle. The number of rows in the triangle is > 1 but <= 100. The numbers in the triangle,
all integers, are between 0 and 99.
Output
Your program is to write to standard output. The highest sum is written as an integer.
Sample Input
5 7 3 8 8 1 0 2 7 4 4 4 5 2 6 5
Sample Output
30
#include<stack> #include<queue> #include<math.h> #include<stdio.h> #include<cstring> #include<string.h> #include<iostream> #include<stdlib.h> #include<algorithm> using namespace std; int n; int map[101][101],maxsum[101][101]; int Maxsum(int i,int j) { if(maxsum[i][j]!=-1) return maxsum[i][j];//记录第一个点至当前点的路径和,并返回->map中 if(i==n) maxsum[i][j]=map[i][j]; else { int x=Maxsum(i+1,j); int y=Maxsum(i+1,j+1); maxsum[i][j]=max(x,y)+map[i][j]; } return maxsum[i][j]; } int main() { int i,j; scanf("%d",&n); for(i=1; i<=n; i++) for(j=1; j<=i; j++) { scanf("%d",&map[i][j]); maxsum[i][j]=-1; } printf("%d\n",Maxsum(1,1)); return 0; }
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