POJ_1163_The Triangle

///简单DP#include<stdio.h>#include<string.h>int n;int triangle[105][105];int sum[105][105];int main(){while(scanf("%d",&n)==1){int i,j;memset(triangle,0,sizeof(triangle));for(i=1;i<=n;i++){for(j=1;j<=i;j++)scanf("%d",&triangle[i][j]);}sum[1][1]=triangle[1][1];for(i=2;i<=n;i++){for(j=1;j<=i;j++){if(j==1)sum[i][j]=triangle[i][j]+sum[i-1][j];else{if(sum[i-1][j-1]>sum[i-1][j])sum[i][j]=sum[i-1][j-1]+triangle[i][j];elsesum[i][j]=sum[i-1][j]+triangle[i][j];}}}int max=0;for(i=1;i<=n;i++)if(max<sum[n][i])max=sum[n][i];printf("%d/n",max);}return 0;}