Created
April 1, 2020 02:48
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[PS][완전탐색][N자리 K진수]/[BOJ][2239][스도쿠]
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#include <iostream> | |
#include <string.h> | |
using namespace std; | |
int map[9][9]; | |
bool flag; | |
bool visited[10]; | |
bool check(int x, int y){ | |
memset(visited,false, sizeof(visited)); | |
for(int i=0; i<9; i++){ | |
int curr = map[x][i]; | |
if(curr && visited[curr]) return false; | |
visited[curr] = true; | |
} | |
memset(visited,false, sizeof(visited)); | |
for(int i=0; i<9; i++){ | |
int curr = map[i][y]; | |
if(curr && visited[curr]) return false; | |
visited[curr] = true; | |
} | |
memset(visited,false, sizeof(visited)); | |
for(int r=0; r<3; r++){ | |
for(int c=0; c<3; c++){ | |
int curr = map[(x/3)*3+r][(y/3)*3+c]; | |
if(curr && visited[curr]) return false; | |
visited[curr] = true; | |
} | |
} | |
return true; | |
} | |
void recur(int x, int y){ | |
if(flag) return; | |
if(y == 9){ | |
x++; | |
y=0; | |
} | |
if(x==9){ | |
flag = true; | |
for(int i=0; i<9; i++){ | |
for(int j=0; j<9; j++){ | |
cout<< map[i][j]; | |
} | |
cout<<"\n"; | |
} | |
return; | |
} | |
if(map[x][y]){ | |
recur(x,y+1); | |
}else | |
{ | |
for(int i=1; i<=9;i++){ | |
map[x][y] = i; | |
if(check(x,y)) recur(x,y+1); | |
} | |
map[x][y] = 0; | |
} | |
} | |
int main (void){ | |
for(int i=0; i<9; i++){ | |
for(int j=0; j<9; j++){ | |
scanf("%1d", &map[i][j]); | |
} | |
} | |
recur(0,0); | |
return 0; | |
} |
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