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WA到吐,求找错。。。#include<stdio.h> #include<string.h> #include<math.h> #include<queue> using namespace std; typedef pair<int,int> pii; priority_queue<pii,vector<pii>,greater<pii> >q; #define INF 9999999999999.9 int r,c; double t[150][150],v[150][150]; int h[150][150]; int vis[150][150],dx[]={-1,1,0,0},dy[]={0,0,-1,1}; void bfs(int x,int y) { memset(vis,0,sizeof(vis)); for(int i=0;i<r;i++) for(int j=0;j<c;j++) t[i][j]=INF; t[0][0]=0; q.push(make_pair(t[0][0],0)); while(!q.empty()) { pii u=q.top();q.pop(); int x=u.second/c,y=u.second%c; if(x==r-1&&y==c-1) return; if(vis[x][y]) continue; vis[x][y]=1; for(int d=0;d<4;d++) { int xx=x+dx[d],yy=y+dy[d]; if(xx>=0&&xx<r&&yy>=0&&yy<c) { if(t[xx][yy]>t[x][y]+1.0/v[x][y]) { v[xx][yy]=v[x][y]*pow(2.0,(h[x][y]-h[xx][yy])*1.0); t[xx][yy]=t[x][y]+1/v[x][y]; q.push(make_pair(t[xx][yy],(xx*c+yy))); } } } } } int main() { while(scanf("%lf%d%d",&v[0][0],&r,&c)!=EOF) { for(int i=0;i<r;i++) for(int j=0;j<c;j++) scanf("%d",&h[i][j]); bfs(0,0); printf("%.2lf\n",t[r-1][c-1]); } return 0; } Followed by:
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