From f09bf30d08560cdd38b411ff057b895a57b8a0f4 Mon Sep 17 00:00:00 2001
From: azuminha <azuminha@azuminha.com>
Date: Thu, 3 Aug 2023 12:42:11 -0300
Subject: first commit~

---
 README.md |  2 ++
 solve.c   | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+)
 create mode 100644 README.md
 create mode 100644 solve.c

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..26714d9
--- /dev/null
+++ b/README.md
@@ -0,0 +1,2 @@
+-- links
+https://www.websudoku.com/?level=2
\ No newline at end of file
diff --git a/solve.c b/solve.c
new file mode 100644
index 0000000..d1f7114
--- /dev/null
+++ b/solve.c
@@ -0,0 +1,76 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+int** create_sudoku();
+void print_sudoku(int** sudoku);
+int calculate_square(int lin, int col);
+
+bool lines[9][10], columns[9][10], squares[9][10]; 
+
+int main(){
+    int** sudoku = create_sudoku();
+    print_sudoku(sudoku);
+
+    memset(lines, 0, sizeof(lines));
+    memset(columns, 0, sizeof(columns));
+    memset(squares, 0, sizeof(squares));
+
+    for(int i = 0; i < 9; ++i){
+        for(int j = 0; j < 9; ++j){
+            int val = sudoku[i][j];
+            if(val != 0){
+                lines[i][val] = true;
+                columns[j][val] = true;
+                squares[calculate_square(i, j)][val] = true;
+            }
+        }
+    }
+    
+}
+
+int calculate_square(int lin, int col){
+    /*
+    0 1 2
+    3 4 5
+    6 7 8
+    */
+    return (lin/3)*3 + col/3;
+}
+
+void print_sudoku(int** sudoku){
+    for(int i = 0; i < 9; ++i){
+        for(int j = 0; j < 9; ++j){
+            printf("%d ", sudoku[i][j]);
+        }
+        printf("\n");
+    }
+}
+
+int** create_sudoku(){
+    int s[9][9] = {
+        2,0,0,   0,0,3,  7,9,4,
+        4,0,0,   6,0,5,  0,8,0,
+        0,0,1,   0,0,7,  0,0,0,
+
+        0,3,2,   0,0,0,  0,0,8,
+        0,0,4,   0,0,0,  9,0,0,
+        9,0,0,   0,0,0,  5,4,0,
+
+        0,0,0,   9,0,0,  1,0,0,
+        0,4,0,   5,0,6,  0,0,7,
+        3,8,5,   1,0,0,  0,0,9,
+    };
+
+    int **r = (int**)malloc(sizeof(int*)*9);
+    for(int i = 0; i < 9; ++i){
+        r[i] = (int*)malloc(sizeof(int)*9);
+
+        for(int j = 0; j < 9; ++j){
+            r[i][j] = s[i][j];
+        }
+    }
+
+    return r;
+}
\ No newline at end of file
-- 
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