oj.uz

Submission #537056

# Submission time Handle Problem Language Result Execution time Memory
537056 2022-03-14T10:46:46 Z qwerasdfzxcl The Kingdom of JOIOI (JOI17_joioi) C++14
100 / 100
 737 ms 32056 KB 
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
int n, m, a[2020][2020], tmp[2020][2020], d[2020];

bool solve(int val, int x, int y){
    int mn = a[x][y];
    for (int i=1;i<=n;i++){
        for (d[i]=0;d[i]<d[i-1];d[i]++){
            if (d[i]==m || a[i][d[i]+1] - mn > val) break;
        }
    }
    if (d[x] < y) return 0;

    //if (val==11) {for (int i=1;i<=n;i++) printf("%d ", d[i]); printf("\n");}

    int mx = 0;
    mn = 1e9;
    for (int i=1;i<=n;i++){
        assert(d[i] <= d[i-1]);
        for (int j=d[i]+1;j<=m;j++){
            mn = min(mn, a[i][j]);
            mx = max(mx, a[i][j]);
        }
    }
    return mx - mn <= val;
}

int getans(int x, int y){
    int l = 0, r = 1e9, ret = 1e9;
    while(l<=r){
        int mid = (l+r)>>1;
        if (solve(mid, x, y)) ret = mid, r = mid-1;
        else l = mid+1;
    }
    //printf("YES: %d\n", ret);
    return ret;
}

void flipx(int &x, int &y){
    x = n+1-x;
    for (int i=1;i<=n;i++){
        for (int j=1;j<=m;j++){
            tmp[n+1-i][j] = a[i][j];
        }
    }

    for (int i=1;i<=n;i++){
        for (int j=1;j<=m;j++){
            a[i][j] = tmp[i][j];
        }
    }
}

void flipy(int &x, int &y){
    y = m+1-y;
    for (int i=1;i<=n;i++){
        for (int j=1;j<=m;j++){
            tmp[i][m+1-j] = a[i][j];
        }
    }

    for (int i=1;i<=n;i++){
        for (int j=1;j<=m;j++){
            a[i][j] = tmp[i][j];
        }
    }
}

int main(){
    scanf("%d %d", &n, &m);
    d[0] = m;

    int mn = 2e9, x, y;
    for (int i=1;i<=n;i++){
        for (int j=1;j<=m;j++){
            scanf("%d", a[i]+j);
            if (mn > a[i][j]){
                mn = a[i][j];
                x = i, y = j;
            }
        }
    }

    int ans = getans(x, y); flipx(x, y);
    ans = min(ans, getans(x, y)); flipy(x, y);
    ans = min(ans, getans(x, y)); flipx(x, y);
    ans = min(ans, getans(x, y));

    printf("%d\n", ans);

    return 0;
}

Compilation message

joioi.cpp: In function 'int main()':
joioi.cpp:72:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
joioi.cpp:78:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   78 |             scanf("%d", a[i]+j);
      |             ~~~~~^~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 8 ms 2308 KB Output is correct
17 Correct 9 ms 2412 KB Output is correct
18 Correct 9 ms 2444 KB Output is correct
19 Correct 10 ms 2388 KB Output is correct
20 Correct 9 ms 2132 KB Output is correct
21 Correct 9 ms 2364 KB Output is correct
22 Correct 8 ms 2380 KB Output is correct
23 Correct 10 ms 2388 KB Output is correct
24 Correct 10 ms 2128 KB Output is correct
25 Correct 14 ms 2452 KB Output is correct
26 Correct 10 ms 2456 KB Output is correct
27 Correct 15 ms 2388 KB Output is correct
28 Correct 9 ms 2452 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 8 ms 2308 KB Output is correct
17 Correct 9 ms 2412 KB Output is correct
18 Correct 9 ms 2444 KB Output is correct
19 Correct 10 ms 2388 KB Output is correct
20 Correct 9 ms 2132 KB Output is correct
21 Correct 9 ms 2364 KB Output is correct
22 Correct 8 ms 2380 KB Output is correct
23 Correct 10 ms 2388 KB Output is correct
24 Correct 10 ms 2128 KB Output is correct
25 Correct 14 ms 2452 KB Output is correct
26 Correct 10 ms 2456 KB Output is correct
27 Correct 15 ms 2388 KB Output is correct
28 Correct 9 ms 2452 KB Output is correct
29 Correct 642 ms 30344 KB Output is correct
30 Correct 601 ms 31868 KB Output is correct
31 Correct 653 ms 32024 KB Output is correct
32 Correct 686 ms 32056 KB Output is correct
33 Correct 578 ms 28068 KB Output is correct
34 Correct 737 ms 32004 KB Output is correct
35 Correct 694 ms 31932 KB Output is correct
36 Correct 603 ms 31772 KB Output is correct
37 Correct 712 ms 31992 KB Output is correct