제출 #784343

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
784343		qwerasdfzxcl	Wombats (IOI13_wombats)	C++17	100 / 100	6576 ms	101144 KiB

wombats

#include "wombats.h"
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
constexpr int INF = 2e9 + 100, FUCK = 20;

int (*H)[200], (*V)[200], n, m;
int sum[5000][200];
int b[202][202], c[202][202], opt[202][202];

inline int dist(int x, int i, int j){
    if (i<=j) return sum[x][j] - sum[x][i];
    return sum[x][i] - sum[x][j];
}

struct Node{
    int a[202][202];
    int s, e;

    Node(){}

    void init(int l, int r){
        s = l, e = r;
        for (int i=0;i<m;i++){
            for (int j=0;j<m;j++){
                a[i][j] = dist(l, i, j);
            }
        }

        for (int z=l+1;z<=r;z++){
            for (int i=0;i<m;i++){
                for (int j=0;j<m;j++){
                    b[i][j] = dist(z, i, j);
                }
            }

            for (int d=-m+1;d<=m-1;d++){
                for (int i=max(0, -d);i<min(m, m-d);i++){
                    int j = i+d;
                    assert(j>=0 && j<m);
                    c[i][j] = INF;

                    for (int k=((j==0)?0:opt[i][j-1]);k<=((i==m-1)?(m-1):opt[i+1][j]);k++){
                        if (c[i][j] > a[i][k] + b[k][j] + V[z-1][k]){
                            c[i][j] = a[i][k] + b[k][j] + V[z-1][k];
                            opt[i][j] = k;
                        }
                    }
                }
            }

            // for (int i=0;i<m;i++){
            //     for (int j=0;j<m;j++){
            //         c[i][j] = INF;
            //         for (int k=0;k<m;k++){
            //             c[i][j] = min(c[i][j], a[i][k] + b[k][j] + V[z-1][k]);
            //         }
            //     }
            // }

            for (int i=0;i<m;i++){
                for (int j=0;j<m;j++) a[i][j] = c[i][j];
            }
        }
    }

    void merge(const Node &L, const Node &R){
        s = L.s, e = R.e;

        for (int d=-m+1;d<=m-1;d++){
            for (int i=max(0, -d);i<min(m, m-d);i++){
                int j = i+d;
                assert(j>=0 && j<m);
                a[i][j] = INF;

                for (int k=((j==0)?0:opt[i][j-1]);k<=((i==m-1)?(m-1):opt[i+1][j]);k++){
                    if (a[i][j] > L.a[i][k] + R.a[k][j] + V[L.e][k]){
                        a[i][j] = L.a[i][k] + R.a[k][j] + V[L.e][k];
                        opt[i][j] = k;
                    }
                }
            }
        }
        // for (int i=0;i<m;i++){
        //     for (int j=0;j<m;j++){
        //         a[i][j] = INF;
        //         for (int k=0;k<m;k++){
        //             a[i][j] = min(a[i][j], L.a[i][k] + R.a[k][j] + V[L.e][k]);
        //         }
        //     }
        // }
    }
};

struct Seg{
    Node tree[5050 / FUCK * 4];

    void init(int i, int l, int r){
        if (l==r){
            tree[i].init(l*FUCK, min((l+1)*FUCK-1, n-1));
            return;
        }

        int m = (l+r)>>1;
        init(i<<1, l, m); init(i<<1|1, m+1, r);
        tree[i].merge(tree[i<<1], tree[i<<1|1]);
    }

    void update(int i, int l, int r, int p){
        if (r<p || p<l) return;
        if (l==r){
            tree[i].init(l*FUCK, min((l+1)*FUCK-1, n-1));
            return;
        }

        int m = (l+r)>>1;
        update(i<<1, l, m, p); update(i<<1|1, m+1, r, p);
        tree[i].merge(tree[i<<1], tree[i<<1|1]);
    }
}tree;

void initH(int x){
    for (int i=1;i<m;i++) sum[x][i] = sum[x][i-1] + H[x][i-1];
}

void init(int R, int C, int h[5000][200], int v[5000][200]) {
    n = R, m = C;
    H = h, V = v;
    for (int i=0;i<R;i++) initH(i);

    tree.init(1, 0, (n-1)/FUCK);
}

void changeH(int P, int Q, int W) {
    H[P][Q] = W;
    initH(P);

    tree.update(1, 0, (n-1)/FUCK, P/FUCK);
}

void changeV(int P, int Q, int W) {
    V[P][Q] = W;

    tree.update(1, 0, (n-1)/FUCK, P/FUCK);
}

int escape(int V1, int V2) {
    return tree.tree[1].a[V1][V2];
}

컴파일 시 표준 에러 (stderr) 메시지

grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
   15 |  int res;
      |      ^~~

• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 16 / 16
• Subtask 4: 18 / 18
• Subtask 5: 21 / 21
• Subtask 6: 24 / 24