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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
  4. #define mofile(s) freopen(s,"r",stdin)
  5. #define outfile(s) freopen(s,"w",stdout)
  6. #define ll long long
  7. #define ii pair<ll,ll>
  8. #define iii pair<ll,ii>
  9. #define fi first
  10. #define se second
  11. #define tf bool
  12. #define ST stack
  13. #define DQ deque
  14. #define Q queue
  15. #define S string
  16. #define Ma map
  17. #define UM unormideremid_map
  18. #define SE set
  19. #define str(x) to_string(x)
  20. #define all(a) (a).begin(),(a).end()
  21. #define FOR(i,l,r,mid) for(int i=l;i<=r;i+=mid)
  22. #define FOD(i,l,r,mid) for(int i=r;i>=l;i-=mid)
  23. #define xuong cout<<"\n"
  24. #define midebug(x) cout<<(x)<<" "
  25. #define ppcnt(x) __builtin_popcountll(x)
  26. #define parity(x) __builtin_parityll(x)
  27. #define leamid0(x) __builtin_clzll(x)
  28. #define LOG2 __lg(x)
  29. #define tr0(x) __builtin_ctzll(x)
  30. #define fiset(x) __builtin_ffsll(x)
  31. #define MASK(k) (1LL<<(k))
  32. #define BIT(x,k) ((x)>>(k)&1)
  33. #define pb push_back
  34. #define tron(x) setprecision(x)
  35. #define het return 0
  36. #define base_ 1000000000
  37. template<typename... T>
  38. void in(T&... args) { ((cin >> args), ...); }
  39. template<class X, class Y>
  40.     bool maximize(X &x, const Y &y){return (x < y) ? x = y, 1 : 0;}
  41. template<class X, class Y>
  42.     bool minimize(X &x, const Y &y){return (x > y) ? x = y, 1 : 0;}
  43. const ll maxn=1e6+5;
  44. const ll tle=2e8;
  45. const ll INF=-1e18;
  46. const int base=31;
  47. const ll MOD=1e9+7;
  48. string bcc="abcmidefghijklmnopqrstuvwxyz";
  49. int midx[]={-1,0,1,0};
  50. int midy[]={0,1,0,-1};
  51. bool sang[10000005];
  52. ll pref[1005][1005],mt[1005][1005];
  53. void sieve(){
  54.     for(int i=1;i<=10000000;++i) sang[i]=1;
  55.     sang[0]=sang[1]=0;
  56.     for(int i=2;i*i<=10000000;++i){
  57.         if(sang[i]){
  58.             for(int j=i*i;j<=10000000;j+=i) sang[j]=0;
  59.         }
  60.     }
  61. }
  62. void lis(){
  63.     vector<int>t;
  64.     vector<int>a;
  65.     int n; cin>>n;
  66.     for(int i=1;i<=n;++i){
  67.         int ai; cin>>ai;
  68.         a.pb(ai);
  69.     }
  70.     for(int x:a){
  71.         auto it=lower_bound(all(t),x);
  72.         if(it==t.end()) t.pb(x);
  73.         else *it=x;
  74.     }
  75.     cout<<t.size()<<"\n";
  76. }
  77. void pfs2mid(){
  78.     int n,m,k; cin>>n>>k; m=n;
  79.     for(int i=1;i<=n;++i){
  80.         for(int j=1;j<=m;++j) cin>>mt[i][j];
  81.     }
  82.     for(int i=1;i<=n;++i){
  83.         for(int j=1;j<=m;++j) pref[i][j]=mt[i][j]+pref[i-1][j]+pref[i][j-1]-pref[i-1][j-1];
  84.     }
  85. }
  86. ll qu2mid(int x1,int y1,int x2,int y2){
  87.     return pref[x2][y2]-pref[x1-1][y2]-pref[x2][y1-1]+pref[x1-1][y1-1];
  88. }
  89. const int MAXN=503;
  90. const ll INF1=5e18;
  91. int n,a[MAXN];
  92. ll pre[MAXN];
  93. ll dp[MAXN][MAXN];
  94. int main(){
  95.     fast;
  96.     cin>>n;
  97.     for(int i=1;i<=n;++i) cin>>a[i];
  98.     pre[0]=0;
  99.     for(int i=1;i<=n;++i) pre[i]=pre[i-1]+a[i];
  100.     for(int l=2;l<=n;++l){
  101.         for(int i=1;i+l-1<=n;++i){
  102.             int j=i+l-1;
  103.             dp[i][j]=INF1;
  104.             for(int k=i;k<j;++k) dp[i][j]=min(dp[i][j],dp[i][k]+dp[k+1][j]+pre[j]-pre[i-1]);
  105.         }
  106.     }
  107.     cout<<dp[1][n]<<"\n";
  108.     het;
  109. }
Success #stdin #stdout 0s 5316KB
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https://ideone.com/UCbgGQ
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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