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谁能看一下错误?谢谢从晚上做到凌晨 后来一直wa 请求帮助。(找不到错误,也测试不出错误) 感谢。 #include <iostream> #include <cstdio> #include <cstdlib> #include <cstring> using namespace std; const int ppmm[]={0,1,1,2}; typedef struct { int x,y; } COW; typedef struct { int y,s; } STATE; COW cow[1005]; STATE a[1005]; int dp[1005][1005][4]; int cmp(const void *a,const void *b) { COW *p=(COW*) a,*q=(COW*) b; return p->y-q->y; } 。 int cost(int x,int y) { if ((x|y)!=x) return -1; return ((x<3)?1:2); } int main() { int m,n,i,j,k,x,y,may,c; while (scanf("%d%d%d",&n,&k,&i)!=EOF) { for (i=0;i<n;++i) { scanf("%d%d",&cow[i].x,&cow[i].y); } qsort(cow,n,sizeof(COW),cmp); m=j=a[0].s=0; for (i=0;i<n;++i) if (cow[i].y!=j) { a[++m].y=j=cow[i].y; a[m].s=(1<<(2-cow[i].x)); } else a[m].s=3; if (k>=m) { printf("%d\n",n); continue; } a[0].y=a[1].y-1; memset(dp,0xff,sizeof(dp)); dp[0][0][1]=dp[0][0][2]=dp[0][0][3]=0; for (i=1;i<=k;++i) { //矩形数 for (j=i;j<=m;++j) { //有效列数 for (x=1;x<=3;++x) { //现在状态 if ((c=cost(x,a[j].s))<0) continue; if (dp[i][j-1][x]>=0) dp[i][j][x]=c+(a[j].y-a[j-1].y-1)*ppmm[x]+dp[i][j-1][x]; for (y=1;y<=3;++y) { if (dp[i-1][j-1][y]>=0) { may=c+dp[i-1][j-1][y]; if ((dp[i][j][x]<0) || (may<dp[i][j][x])) dp[i][j][x]=may; } } } } } may=dp[k][m][1]; for (i=2;i<=3;++i) if ((may<0) || ((may>dp[k][m][i]) && (dp[k][m][i]>=0))) may=dp[k][m][i]; printf("%d\n",may); } return 0; } Followed by:
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