Submission #444808

#	Time	Username	Problem	Language	Result	Execution time	Memory
444808		FEDIKUS	Raisins (IOI09_raisins)	C++17	100 / 100	288 ms	24772 KiB

raisins

#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define pf push_front
#define popb pop_back
#define popf pop_front
#define xx first
#define yy second
#define srt(a) sort(a.begin(),a.end());
#define srtg(a,int) sort(a.begin(),a.end(),greater<int>())
#define lb(a,x) lower_bound(a.begin(),a.end(),x)
#define up(a,x) upper_bound(a.begin(),a.end(),x)
#define fnd(a,x) find(a.begin(),a.end(),x)
#define vstart auto startt=chrono::system_clock::now()
#define vend auto endd=chrono::system_clock::now()
#define vvreme chrono::duration<double> vremee=endd-startt
#define ios ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

using namespace std;

typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef string str;

const int maxn=60;

int r[maxn][maxn];
int pref[maxn][maxn];
int memo[maxn][maxn][maxn][maxn];

inline int vr(int i,int j){
    if(i<0 || j<0) return 0;
    return pref[i][j];
}

inline int koliko(int i1,int j1,int i2,int j2){
    return vr(i2,j2)-vr(i2,j1-1)-vr(i1-1,j2)+vr(i1-1,j1-1);
}

int resi(int i1,int j1,int i2,int j2){
    if(i1==i2 && j1==j2) return 0;
    if(memo[i1][j1][i2][j2]!=0) return memo[i1][j1][i2][j2];
    int ret=INT_MAX;
    for(int i=i1;i<i2;i++){
        ret=min(ret,resi(i1,j1,i,j2)+resi(i+1,j1,i2,j2));
    }
    for(int j=j1;j<j2;j++){
        ret=min(ret,resi(i1,j1,i2,j)+resi(i1,j+1,i2,j2));
    }
    ret+=koliko(i1,j1,i2,j2);
    memo[i1][j1][i2][j2]=ret;
    return ret;
}

void solve(){
    int n,m;
    cin>>n>>m;
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++) cin>>r[i][j];
    }
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            pref[i][j]=r[i][j];
            if(i!=0 || j!=0) pref[i][j]+=vr(i-1,j)+vr(i,j-1)-vr(i-1,j-1);
        }
    }
    cout<<resi(0,0,n-1,m-1);
}

int main(){
    ios;
    int t=1;
    //cin>>t;
    while(t--) solve();
    return 0;
}

• Subtask 1: 100 / 100