Submission #395087

#	Time	Username	Problem	Language	Result	Execution time	Memory
395087		MarcoMeijer	Raisins (IOI09_raisins)	C++14	100 / 100	192 ms	13520 KiB

raisins

#include <bits/stdc++.h>
using namespace std;
 
// macros
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef pair<ll, ll> lll;
typedef tuple<int, int, int> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef vector<ll> vll;
typedef vector<lll> vlll;
#define REP(a,b,c) for(int a=int(b); a<int(c); a++)
#define RE(a,c) REP(a,0,c)
#define RE1(a,c) REP(a,1,c+1)
#define REI(a,b,c) REP(a,b,c+1)
#define REV(a,b,c) for(int a=int(c-1); a>=int(b); a--)
#define FOR(a,b) for(auto& a : b)
#define all(a) a.begin(), a.end()
#define INF 1e18
#define EPS 1e-9
#define pb push_back
#define popb pop_back
#define fi first
#define se second
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
 
// input
template<class T> void IN(T& x) {cin >> x;}
template<class H, class... T> void IN(H& h, T&... t) {IN(h); IN(t...); }
 
// output
template<class T1, class T2> void OUT(const pair<T1,T2>& x);
template<class T> void OUT(const vector<T>& x);
template<class T> void OUT(const T& x) {cout << x;}
template<class H, class... T> void OUT(const H& h, const T&... t) {OUT(h); OUT(t...); }
template<class T1, class T2> void OUT(const pair<T1,T2>& x) {OUT(x.fi,' ',x.se);}
template<class T> void OUT(const vector<T>& x) {RE(i,x.size()) OUT(i==0?"":" ",x[i]);}
template<class... T> void OUTL(const T&... t) {OUT(t..., "\n"); }
template<class H> void OUTLS(const H& h) {OUTL(h); }
template<class H, class... T> void OUTLS(const H& h, const T&... t) {OUT(h,' '); OUTLS(t...); }
 
// dp
template<class T> bool ckmin(T&a, T&b) { bool bl = a > b; a = min(a,b); return bl;}
template<class T> bool ckmax(T&a, T&b) { bool bl = a < b; a = max(a,b); return bl;}
 
void program();
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    program();
}
 
 
//===================//
//   begin program   //
//===================//
 
const int MX = 51;
const int N = (1<<20);

int n, m;
int cnt[MX][MX];
int dp[MX][MX][MX][MX];

void program() {
    IN(n,m);
    RE(i,MX) RE(j,MX) cnt[i][j] = 0;
    RE(i,n) RE(j,m) cin>>cnt[i+1][j+1];
    RE(i,n+1) RE(j,m+1) {
        if(i   ) cnt[i][j] += cnt[i-1][j  ];
        if(   j) cnt[i][j] += cnt[i  ][j-1];
        if(i&&j) cnt[i][j] -= cnt[i-1][j-1];
    }
    RE1(w,n) RE1(h,m) RE(l,n-w+1) RE(u,m-h+1) {
        int r = l+w-1;
        int d = u+h-1;
        if(l == r && u == d) {
            dp[l][r][u][d] = 0;
        } else {
            int res = 1e9;
            REP(x,l,r) res = min(res, dp[l][x][u][d] + dp[x+1][r][u][d]);
            REP(y,u,d) res = min(res, dp[l][r][u][y] + dp[l][r][y+1][d]);
            dp[l][r][u][d] = res + cnt[r+1][d+1] - cnt[l][d+1] - cnt[r+1][u] + cnt[l][u];
        }
    }
    cout<<dp[0][n-1][0][m-1]<<endl;
}

• Subtask 1: 100 / 100