oj.uz

Submission #171205

# Submission time Handle Problem Language Result Execution time Memory
171205 2019-12-27T18:49:59 Z donentseto Red-blue table (IZhO19_stones) C++14
100 / 100
 30 ms 1428 KB 
#include <bits/stdc++.h>
using namespace std;
int main (){

    ios::sync_with_stdio (false);
    cin.tie (0);

    int t;
    cin >> t;
    while (t --){
        int n, m;
        cin >> n >> m;
        if (n <= 2 && m >= n){
            cout << m << '\n';
            for (int i = 0; i < n; i ++){
                for (int j = 0; j < m; j ++) cout << '-';
                cout << '\n';
            }
        }
        else if (m <= 2){
            cout << n << '\n';
            for (int i = 0; i < n; i ++){
                for (int j = 0; j < m; j ++) cout << '+';
                cout << '\n';
            }
        }
        /*else if (n <= 4 && m >= n){
            cout << m + 1 << '\n';
            for (int i = 0; i < m; i ++) cout << '+';
            cout << '\n';
            for (int i = 1; i < n; i ++){
                for (int i = 0; i < m; i ++) cout << '-';
                cout << '\n';
            }
        }
        else if (m <= 4){
            cout << n + 1 << '\n';
            for (int i = 0; i < n; i ++){
                cout << '-';
                for (int j = 1; j < m; j ++) cout << '+';
                cout << '\n';
            }
        }*/
        else if (m % 2 == 0 && (n - 1 >> 1) << 1 <= (m >> 1) + 1){
            cout << m + n - 3 + n % 2 << '\n';
            for (int i = 0; i < n - 1 >> 1; i ++){
                for (int j = 0; j <= m >> 1; j ++){
                    if (j >> 1 == i) cout << '+';
                    else cout << '-';
                }
                for (int j = 1; j < m >> 1; j ++) cout << '+';
                cout << '\n';
            }
            for (int i = n & 1; i < 3; i ++){
                for (int j = 0; j < m; j ++) cout << '-';
                cout << '\n';
            }
            for (int i = 1; i < n - 1 >> 1; i ++){
                for (int j = 0; j <= m >> 1; j ++) cout << '+';
                for (int j = 1; j < m >> 1; j ++) cout << '-';
                cout << '\n';
            }
        }
        else if (n % 2 == 0 && (m - 1 >> 1) << 1 <= (n >> 1) + 1){
           cout << m + n - 3 + m % 2 << '\n';
           for (int i = 0; i <= n >> 1; i ++){
               for (int j = 0; j < m - 1 >> 1; j ++){
                   if (i >> 1 == j) cout << '-';
                   else cout << '+';
               }
               for (int j = m & 1; j < 3; j ++) cout << '+';
               for (int j = 1; j < m - 1 >> 1; j ++) cout << '-';
               cout << '\n';
           }
           for (int i = 1; i < n >> 1; i ++){
               for (int j = 0; j < m - 1 >> 1; j ++) cout << '-';
               for (int j = 0; j <= m >> 1; j ++) cout << '+';
               cout << '\n';
           }
        }
        else{
            cout << n - 2 + n % 2 + m - 2 + m % 2 << '\n';
            for (int i = 0; i < n; i ++){
                for (int j = 0; j < m; j ++){
                    if (i <= n >> 1 && j < m - 1 >> 1) cout << '-';
                    else if (i >= n - 1 >> 1 && j > m >> 1) cout << '-';
                    else cout << '+';
                }
                cout << '\n';
            }
        }
    }

}

Compilation message

stones.cpp: In function 'int main()':
stones.cpp:44:35: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
         else if (m % 2 == 0 && (n - 1 >> 1) << 1 <= (m >> 1) + 1){
                                 ~~^~~
stones.cpp:46:35: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
             for (int i = 0; i < n - 1 >> 1; i ++){
                                 ~~^~~
stones.cpp:58:35: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
             for (int i = 1; i < n - 1 >> 1; i ++){
                                 ~~^~~
stones.cpp:64:35: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
         else if (n % 2 == 0 && (m - 1 >> 1) << 1 <= (n >> 1) + 1){
                                 ~~^~~
stones.cpp:67:38: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
                for (int j = 0; j < m - 1 >> 1; j ++){
                                    ~~^~~
stones.cpp:72:38: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
                for (int j = 1; j < m - 1 >> 1; j ++) cout << '-';
                                    ~~^~~
stones.cpp:76:38: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
                for (int j = 0; j < m - 1 >> 1; j ++) cout << '-';
                                    ~~^~~
stones.cpp:85:46: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
                     if (i <= n >> 1 && j < m - 1 >> 1) cout << '-';
                                            ~~^~~
stones.cpp:86:37: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
                     else if (i >= n - 1 >> 1 && j > m >> 1) cout << '-';
                                   ~~^~~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 5 ms 580 KB Output is correct

Subtask #4
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 1428 KB Output is correct
2 Correct 28 ms 1272 KB Output is correct
3 Correct 26 ms 1272 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 1404 KB Output is correct
2 Correct 25 ms 1144 KB Output is correct
3 Correct 23 ms 1144 KB Output is correct

Subtask #6
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 5 ms 580 KB Output is correct
5 Correct 26 ms 1428 KB Output is correct
6 Correct 28 ms 1272 KB Output is correct
7 Correct 26 ms 1272 KB Output is correct
8 Correct 30 ms 1404 KB Output is correct
9 Correct 25 ms 1144 KB Output is correct
10 Correct 23 ms 1144 KB Output is correct
11 Correct 11 ms 632 KB Output is correct
12 Correct 23 ms 1144 KB Output is correct
13 Correct 26 ms 1144 KB Output is correct
14 Correct 18 ms 1008 KB Output is correct
15 Correct 29 ms 1400 KB Output is correct
16 Correct 22 ms 1064 KB Output is correct
17 Correct 12 ms 760 KB Output is correct