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BFS~152K 0MS 水过~~#include<stdio.h> #include<string.h> int n; short trian[102][102]; short max1[2][102]={0}; int bfs(){ int maxnum=0; int x,y; for(int i=1;i<n;++i) for(int j=0;j<i;++j) for(int k=0;k<2;++k){ x=i+1; y=j+k; if(max1[x%2][y]<max1[i%2][j]+trian[x][y]) max1[x%2][y]=max1[i%2][j]+trian[x][y]; } for(int i=0;i<n;++i) if(max1[n%2][i]>maxnum) maxnum=max1[n%2][i]; return maxnum; } int main(){ scanf("%d",&n); for(int i=1;i<=n;++i) for(int j=0;j<i;++j) scanf("%d",&trian[i][j]); max1[1][0]=trian[1][0]; printf("%d\n",bfs()); return 0; } Followed by:
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