【洛谷P1941】飞扬的小鸟

f [ i ] [ j ] 表示横坐标为 i ,高度为 j 时的最小点击次数

分别dp处理:

1.上升,(1)<m

(2)>=m

2.下降

3.管道

 #include<cstdio>
#include<cstring>
using namespace std;
const int N=,M=;
const int INF=;
int n,m,k,f[N][M],up[N],down[N],l[N],h[N],flag[N];
int min(int x,int y){
return x<y?x:y;
}
void print(int x){
int sum=;
for (int i=;i<x;i++)
if (flag[i])
sum++;
printf("0\n%d",sum);
}
int main(){
int x,y,p;
scanf("%d %d %d",&n,&m,&k);
for (int i=;i<=n;i++){
scanf("%d %d",&x,&y);
up[i]=x;
down[i]=y;
}
for (int i=;i<=n;i++){
h[i]=m+;
l[i]=;
flag[i]=;
}
for (int i=;i<=k;i++){
scanf("%d %d %d",&p,&x,&y);
h[p]=y;
l[p]=x;
flag[p]=;
}
for (int i=;i<=n;i++)
for (int j=;j<=m;j++)
f[i][j]=INF;
for (int j=;j<=m;j++)
f[][j]=;
for (int i=;i<=n;i++){
for (int j=up[i]+;j<=m;j++){
f[i][j]=min(f[i][j],min(f[i][j-up[i]],f[i-][j-up[i]])+);
}//up<m
for (int j=m-up[i];j<=m;j++)
f[i][m]=min(f[i][m],min(f[i-][j],f[i][j])+);//^up>=m
for (int j=;j<=m-down[i];j++)
f[i][j]=min(f[i][j],f[i-][j+down[i]]);//down
for (int j=h[i];j<=m;j++)//shangjie
f[i][j]=INF;
for (int j=;j<=l[i];j++)//xiajie
f[i][j]=INF;
int judge=;
for (int j=;j<=m;j++)//check
if (f[i][j]<INF)
judge=;
if (!judge){
print(i);
return ;
}
}
int ans=INF;
for (int j=;j<=m;j++)
ans=min(ans,f[n][j]);
printf("1\n%d",ans);
return ;
}

STD

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