Kirai[HDOJ5900]QSC and Master（区间dp）
题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=5900
巧妙的地方在于第四个转移，假如dp(i,j)区间内所有的都取了，那状态的值应该是s(j)-s(i-1)
1 #include <bits/stdc++.h> 2 using namespace std; 3 #define fr first 4 #define sc second 5 #define cl clear 6 #define BUG puts("here!!!") 7 #define W(a) while(a--) 8 #define pb(a) push_back(a) 9 #define Rint(a) scanf("%d", &a) 10 #define Rll(a) scanf("%I64d", &a) 11 #define Rs(a) scanf("%s", a) 12 #define Cin(a) cin >> a 13 #define FRead() freopen("in", "r", stdin) 14 #define FWrite() freopen("out", "w", stdout) 15 #define Rep(i, len) for(int i = 0; i < (len); i++) 16 #define For(i, a, len) for(int i = (a); i < (len); i++) 17 #define Cls(a) memset((a), 0, sizeof(a)) 18 #define Clr(a, x) memset((a), (x), sizeof(a)) 19 #define Full(a) memset((a), 0x7f7f7f, sizeof(a)) 20 #define lrt rt << 1 21 #define rrt rt << 1 | 1 22 #define pi 3.14159265359 23 #define RT return 24 #define lowbit(x) x & (-x) 25 #define onecnt(x) __builtin_popcount(x) 26 typedef long long LL; 27 typedef long double LD; 28 typedef unsigned long long ULL; 29 typedef pair<int, int> pii; 30 typedef pair<string, int> psi; 31 typedef pair<LL, LL> pll; 32 typedef map<string, int> msi; 33 typedef vector<int> vi; 34 typedef vector<LL> vl; 35 typedef vector<vl> vvl; 36 typedef vector<bool> vb; 37 38 const int maxn = 330; 39 int n; 40 pii a[maxn]; 41 LL s[maxn]; 42 LL dp[maxn][maxn]; 43 44 signed main() { 45 //FRead(); 46 int T; 47 Rint(T); 48 W(T) { 49 Cls(s); 50 Rint(n); 51 For(i, 1, n+1) Rint(a[i].first); 52 For(i, 1, n+1) { 53 Rint(a[i].second); 54 s[i] = s[i-1] + a[i].second; 55 } 56 Cls(dp); 57 For(k, 2, n+1) { 58 For(i, 1, n-k+2) { 59 int j = i + k - 1; 60 For(p, i, j) dp[i][j] = max(dp[i][j], dp[i][p]+dp[p+1][j]); 61 if(__gcd(a[i].first, a[j].first) > 1) { 62 if(k == 2) dp[i][j] = a[i].second + a[j].second; 63 else { 64 if(s[j-1] - s[i] == dp[i+1][j-1]) { 65 dp[i][j] = max(dp[i][j], dp[i+1][j-1]+a[i].second+a[j].second); 66 } 67 } 68 dp[i][j] = max(dp[i][j], max(dp[i][j-1], dp[i+1][j])); 69 } 70 } 71 } 72 printf("%I64d\n", dp[1][n]); 73 } 74 RT 0; 75 }
