87 lines
1.9 KiB
C++
87 lines
1.9 KiB
C++
#include<stdio.h>
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#include<string.h>
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#include<map>
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#include<iostream>
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using namespace std;
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map<string,int>q;
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const int M=201;
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const int inf=999999999;
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int Map[M][M],match[M],lx[M],ly[M],vx[M],vy[M];
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int n,m;
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int hungery(int u)
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{
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int i;
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vx[u]=1;
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for(i=1;i<=m;i++)
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{
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if(!vy[i]&&lx[u]+ly[i]==Map[u][i])
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{
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vy[i]=1;
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if(match[i]==-1||hungery(match[i]))
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{
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match[i]=u;
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return 1;
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}
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}
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}
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return 0;
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}
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void KM()
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{
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int i,temp,j;
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for(i=1;i<=n;i++)
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for(j=1;j<=m;j++)
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lx[i]=max(lx[i],Map[i][j]);
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memset(ly,0,sizeof(ly));
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memset(match,-1,sizeof(match));
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for(i=1;i<=n;i++)
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{
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while(1)
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{
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memset(vx,0,sizeof(vx));
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memset(vy,0,sizeof(vy));
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if(hungery(i))
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break;
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temp=inf;
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for(j=1;j<=n;j++)
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if(vx[j])
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for(int z=1;z<=m;z++)
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if(!vy[z]&&temp>lx[j]+ly[z]-Map[j][z])
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temp=lx[j]+ly[z]-Map[j][z];
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for(j=1;j<=n;j++)
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if(vx[j])
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lx[j]-=temp;
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for(j=1;j<=m;j++)
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if(vy[j])
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ly[j]+=temp;
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}
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}
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}
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int main()
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{
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int i,k,w,num1,num2,j;
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char s1[21],s2[21];
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while(~scanf("%d%d%d",&n,&m,&k))
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{
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for(i=1;i<=n;i++)
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for(j=1;j<=m;j++)
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Map[i][j]=-inf;
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num1=num2=0;
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for(i=1;i<=k;i++)
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{
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scanf("%s%s%d",s1,s2,&w);
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if(q[s1]==0)
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q[s1]=++num1;
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if(q[s2]==0)
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q[s2]=++num2;
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Map[q[s1]][q[s2]]=-w;
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}
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KM();
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int sum=0;
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for(i=1;i<=m;i++)
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if(match[i]!=-1&&Map[match[i]][i]!=-inf)
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sum+=Map[match[i]][i];
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printf("%d\n",-sum);
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}
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}
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