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求救,TLE了,在discuss上一个差不多的模板过了#include<stdio.h> #include<string.h> #include<iostream> #include<memory.h> #include<queue> #include<cstdio> #include <cmath> using namespace std; #define MAXN 110 #define INF 999999999 int n,np,nc,m; int cap[MAXN][MAXN],father[MAXN],res; int start,end; queue<int>q; void maxflow() { int x,i,temp,ok; while(1) { ok=0; for(i=0;i<=end;i++) father[i]=-1; q.push(start); temp=INF; while(!q.empty()) { x=q.front(); q.pop(); for(i=0;i<=end;i++) { if(father[i]==-1&&cap[x][i]>0) { if(i==end) ok=1; father[i]=x; temp=temp<cap[x][i]?temp:cap[x][i]; q.push(i); } } } if(!ok) break; for(i=end;i!=0;i=father[i]) { cap[father[i]][i]-=temp; cap[i][father[i]]+=temp; } res+=temp; } return ; } int main() { int i,j,a,b,c; char s[30]; while(scanf("%d%d%d%d",&n,&np,&nc,&m)!=EOF) { start=0; end=n+1; for(i=0;i<=end;i++) for(j=0;j<=end;j++) cap[i][j]=0; for(i=0;i<m;i++) { scanf("%s",s); sscanf(s,"(%d,%d)%d",&a,&b,&c); cap[a+1][b+1]+=c; } for(i=0;i<np;i++) { scanf("%s",s); sscanf(s,"(%d)%d",&a,&b); cap[start][a+1]+=b; } for(i=0;i<nc;i++) { scanf("%s",s); sscanf(s,"(%d)%d",&a,&b); cap[a+1][end]+=b; } res=0; maxflow(); printf("%d\n",res); } return 0; } Followed by:
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