牛客多校Round 3

Solved:2

rank:306

跑路场.....

A.PACM team 

简单背包记录路径都写挂 退役算了

#include <bits/stdc++.h>
using namespace std;

int p[40];
int a[40];
int c[40];
int m[40];
int g[40];
int dp[37][37][37][37];
int vis[40];

int main()
{
    int n;
    scanf("%d", &n);
    for(int i = 1; i <= n; i++)
        scanf("%d%d%d%d%d", &p[i], &a[i], &c[i], &m[i], &g[i]);
    int P, A, C, M;
    scanf("%d%d%d%d", &P, &A, &C, &M);

    for(int i = 1; i <= n; i++)
    {
        for(int i1 = P; i1 >= p[i]; i1--)
            for(int i2 = A; i2 >= a[i]; i2--)
                for(int i3 = C; i3 >= c[i]; i3--)
                    for(int i4 = M; i4 >= m[i]; i4--)
                        dp[i1][i2][i3][i4] = max(dp[i1][i2][i3][i4], dp[i1 - p[i]][i2 - a[i]][i3 - c[i]][i4 - m[i]] + g[i]);
    }

    int cnt = 0;
    int tmp = P, tma = A, tmc = C, tmm = M;
    for(int i = n; i >= 1; i--)
    {
        if(tmp < p[i] || tma < a[i] || tmc < c[i] || tmm < m[i]) continue;

        if(dp[tmp][tma][tmc][tmm] == dp[tmp - p[i]][tma - a[i]][tmc - c[i]][tmm - m[i]] + g[i])
        {
            vis[i] = 1; cnt++;
            tmp -= p[i];
            tma -= a[i];
            tmc -= c[i];
            tmm -= m[i];
        }
    }
    printf("%d
", cnt);
    for(int i = 1; i <= n; i++)
    {
        if(vis[i])
        {
            cnt--;
            if(cnt) printf("%d ", i - 1);
            else printf("%d
", i - 1);
        }
    }

    return 0;
}

E.Sort String 

next数组的应用

#include <bits/stdc++.h>
using namespace std;

char s[1000005];
int nex[1000005];
void getfail(char *s, int* f)
{
    f[0] = f[1] = 0;
    int len = strlen(s);
    for(int i = 1; i < len; i++)
    {
        int j = f[i];
        while(j && s[i] != s[j]) j = f[j];
        f[i + 1] = s[i] == s[j] ? j + 1 : 0;
    }
}

int main()
{
    scanf("%s", s);
    getfail(s, nex);
    int len = strlen(s);

    if(len % (len - nex[len]) == 0 && len / (len - nex[len]) != 1)
    {
        int cir = len - nex[len];
        int cn = len / cir;
        printf("%d
", cir);
        for(int j = 0; j < cir; j++)
        {
            printf("%d", cn);
            for(int k = j; k < len; k += cir)
                printf(" %d", k);
            puts("");
        }
    }
    else
    {
        printf("%d
", len);
        for(int i = 0; i < len; i++)
            printf("%d %d
", 1, i);
    }

    return 0;
}