dp

题目描述：

 

 

 

 

 AC代码：

#include<cstdio>
#include<cstring>
#include<algorithm>
using namespace std;
const int maxn=10005,maxm=1005;
int n,m,p;
int clic[maxn],uncl[maxn],L[maxn],H[maxn];
int f[maxn][maxm],cnt,INF;
inline int read()
{
    int x = 0; 
    char ch = getchar();
    while(ch < '0' || ch > '9') 
        ch = getchar();
    while(ch >= '0' && ch <= '9') 
    {
        x = x * 10 + ch - '0';
        ch = getchar();
    }
    return x;
}

int main()
{
    n = read();
    m = read();
    p = read();
    for(int i = 1;i <= n;i++) 
    {
        clic[i] = read();
        uncl[i] = read();
    }
    for(int i = 1;i <= n;i++) 
    {
        L[i] = 0;
        H[i] = m + 1;
    }
    for(int i = 1;i <= p;i++)
    {
        int x = read();
        L[x] = read();
        H[x] = read();
    }
    memset(f,63,sizeof(f));
    INF = f[0][0];
    cnt = 0;
    for(int i = 0;i <= m;i++)
        f[0][i] = 0;
    for(int i = 1;i <= n;i++)
    {
        for(int j = 1;j < H[i];j++) 
            if(j >= clic[i] && j != m)
                f[i][j] = min(f[i][j],min(f[i - 1][j - clic[i]] + 1,f[i][j - clic[i]] + 1));
        for(int j = 1;j < H[i];j++) 
            if(j + uncl[i] <= m && j >= L[i] + 1)
                f[i][j] = min(f[i][j],f[i - 1][j + uncl[i]]);
            if(H[i] == m + 1)
                for(int j = m;j >= max(1,m - clic[i]);j--) 
                    f[i][m] = min(f[i][m],min(f[i - 1][j] + 1,f[i][j] + 1));
        bool flythr = 0;
        for(int j = L[i] + 1;j < H[i];j++) 
            if(f[i][j] < INF)
            {
                flythr=1; 
                break;
            }
        for(int j = 0;j <= L[i];j++) 
            f[i][j] = INF;
        if(!flythr)
        {
            printf("0
%d",cnt);
            return 0;
        }
        if(L[i] > 0 || H[i] < m) 
            cnt++;
    }
    int ans = 1 << 30;
    for(int i = 1;i <= m;i++) 
        ans = min(ans,f[n][i]);
    printf("1
%d",ans);
    return 0;
}

dpdpdp!!!