oj.uz

Submission #319976

# Submission time Handle Problem Language Result Execution time Memory
319976 2020-11-07T04:28:57 Z jamezzz Furniture (JOI20_furniture) C++14
100 / 100
 462 ms 13028 KB 
#include <bits/stdc++.h>
using namespace std;

int n, m, q, x, y, c[2005];
bool r[1005][1005];

void dfs(int x, int y);

void push(int x, int y){
    if (r[x][y]){
        r[x][y] = false;
        --c[x + y];
        dfs(x, y);
    }
}

int add(int x, int y){
    if (!r[x][y]) return 1; //no path through (x, y)
    if (c[x + y] == 1) return 0;
    push(x, y);
    return 1;
}

void dfs(int x, int y){
    if (!r[x - 1][y + 1]){
        push(x - 1, y);
        push(x, y + 1);
    }
    if (!r[x + 1][y - 1]){
        push(x, y - 1);
        push(x + 1, y);
    }
}



int main(){
    scanf("%d%d", &n, &m);
    for (int i = 1; i <= n; ++i){
        for (int j = 1; j <= m; ++j){
            r[i][j] = true;
            ++c[i + j];
        }
    }

    for (int i = 1; i <= n; ++i){
        for (int j = 1; j <= m; ++j){
            scanf("%d", &x);
            if (x == 1) add(i, j);
        }
    }

    scanf("%d", &q);
    for (int i = 0; i < q; ++i){
        scanf("%d%d", &x, &y);
        printf("%d\n", add(x, y));
    }
}

Compilation message

furniture.cpp: In function 'int main()':
furniture.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   38 |     scanf("%d%d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~
furniture.cpp:48:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   48 |             scanf("%d", &x);
      |             ~~~~~^~~~~~~~~~
furniture.cpp:53:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   53 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
furniture.cpp:55:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   55 |         scanf("%d%d", &x, &y);
      |         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 2 ms 640 KB Output is correct
3 Correct 3 ms 492 KB Output is correct
4 Correct 4 ms 492 KB Output is correct
5 Correct 5 ms 492 KB Output is correct
6 Correct 5 ms 492 KB Output is correct
7 Correct 5 ms 492 KB Output is correct
8 Correct 5 ms 492 KB Output is correct
9 Correct 5 ms 568 KB Output is correct

Subtask #2
95.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 2 ms 640 KB Output is correct
3 Correct 3 ms 492 KB Output is correct
4 Correct 4 ms 492 KB Output is correct
5 Correct 5 ms 492 KB Output is correct
6 Correct 5 ms 492 KB Output is correct
7 Correct 5 ms 492 KB Output is correct
8 Correct 5 ms 492 KB Output is correct
9 Correct 5 ms 568 KB Output is correct
10 Correct 17 ms 888 KB Output is correct
11 Correct 4 ms 492 KB Output is correct
12 Correct 199 ms 5988 KB Output is correct
13 Correct 93 ms 3300 KB Output is correct
14 Correct 371 ms 10852 KB Output is correct
15 Correct 369 ms 11108 KB Output is correct
16 Correct 400 ms 11876 KB Output is correct
17 Correct 432 ms 12644 KB Output is correct
18 Correct 407 ms 12332 KB Output is correct
19 Correct 429 ms 12900 KB Output is correct
20 Correct 401 ms 13028 KB Output is correct
21 Correct 462 ms 13028 KB Output is correct