oj.uz

Submission #168426

# Submission time Handle Problem Language Result Execution time Memory
168426 2019-12-13T04:40:37 Z juggernaut Chessboard (IZhO18_chessboard) C++14
47 / 100
 661 ms 3836 KB 
#include<bits/stdc++.h>
#define int long long int
#define fr first
#define sc second
using namespace std;
int n,k,i,j,x,y,res;
pair<int,int>p[100001];
bool a[1001][1001];
int get(int f,int q){
    int cnt=0;
    for(int i=0;i<n;i++)
    for(int j=0;j<n;j++){
        x=i/f;
        y=j/f;
        if(q){
            if((x+y)%2==0){
                if(a[i][j])cnt++;
            }else{
                if(!a[i][j])cnt++;
            }
        }else{
            if((x+y)%2==0){
                if(!a[i][j])cnt++;
            }else{
                if(a[i][j])cnt++;
            }
        }
    }
    return cnt;
}
int get(int f){
    return min(get(f,0),get(f,1));
}
void subtask2(){
    int c[2];
    c[0]=c[1]=0;
    for(i=0;i<k;i++){
        scanf("%lld%lld%lld%lld",&p[i].fr,&p[i].sc,&p[i].fr,&p[i].sc);
        p[i].fr--;
        p[i].sc--;
        c[(p[i].fr+p[i].sc)%2]++;
    }
    res=(n/2)*n+((n%2)*(n/2))-c[1]+c[0];
    res=min(res,(n/2)*n+((n%2)*((n+1)/2))-c[0]+c[1]);
    printf("%lld",res);
    exit(0);
}
main(){
    scanf("%lld%lld",&n,&k);
    if(n>1000)subtask2();
    for(i=0;i<k;i++){
        scanf("%lld%lld%lld%lld",&p[i].fr,&p[i].sc,&p[i].fr,&p[i].sc);
        p[i].fr--;
        p[i].sc--;
        a[p[i].fr][p[i].sc]=1;
    }
    res=get(1);
    for(j=2;j*j<=n;j++){
        if(n%j==0){
            res=min(res,get(j));
            res=min(res,get(n/j));
        }
    }
    printf("%lld",res);
}

Compilation message

chessboard.cpp:48:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
chessboard.cpp: In function 'void subtask2()':
chessboard.cpp:38:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld%lld%lld%lld",&p[i].fr,&p[i].sc,&p[i].fr,&p[i].sc);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chessboard.cpp: In function 'int main()':
chessboard.cpp:49:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld%lld",&n,&k);
     ~~~~~^~~~~~~~~~~~~~~~~~
chessboard.cpp:52:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld%lld%lld%lld",&p[i].fr,&p[i].sc,&p[i].fr,&p[i].sc);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 4 ms 256 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 3 ms 256 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 2808 KB Output is correct
2 Correct 9 ms 888 KB Output is correct
3 Correct 22 ms 1912 KB Output is correct
4 Correct 22 ms 1912 KB Output is correct
5 Correct 28 ms 2552 KB Output is correct
6 Correct 18 ms 1676 KB Output is correct
7 Correct 5 ms 632 KB Output is correct
8 Correct 18 ms 1788 KB Output is correct
9 Correct 45 ms 3836 KB Output is correct
10 Correct 26 ms 2296 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 380 KB Output is correct
3 Correct 4 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 3 ms 376 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 3 ms 504 KB Output is correct
8 Correct 3 ms 376 KB Output is correct
9 Correct 3 ms 380 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 3 ms 376 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 380 KB Output is correct
3 Correct 4 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 3 ms 376 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 3 ms 504 KB Output is correct
8 Correct 3 ms 376 KB Output is correct
9 Correct 3 ms 380 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 3 ms 376 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 81 ms 1760 KB Output is correct
17 Correct 63 ms 2652 KB Output is correct
18 Correct 119 ms 2784 KB Output is correct
19 Correct 657 ms 2724 KB Output is correct
20 Correct 661 ms 2808 KB Output is correct
21 Correct 62 ms 2552 KB Output is correct
22 Correct 376 ms 1244 KB Output is correct
23 Correct 183 ms 1912 KB Output is correct
24 Correct 119 ms 2732 KB Output is correct
25 Correct 173 ms 1400 KB Output is correct
26 Correct 95 ms 2300 KB Output is correct
27 Correct 146 ms 2372 KB Output is correct
28 Correct 111 ms 2680 KB Output is correct
29 Correct 41 ms 1788 KB Output is correct
30 Correct 76 ms 1372 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 2808 KB Output is correct
2 Correct 9 ms 888 KB Output is correct
3 Correct 22 ms 1912 KB Output is correct
4 Correct 22 ms 1912 KB Output is correct
5 Correct 28 ms 2552 KB Output is correct
6 Correct 18 ms 1676 KB Output is correct
7 Correct 5 ms 632 KB Output is correct
8 Correct 18 ms 1788 KB Output is correct
9 Correct 45 ms 3836 KB Output is correct
10 Correct 26 ms 2296 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 3 ms 380 KB Output is correct
13 Correct 4 ms 376 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 3 ms 376 KB Output is correct
16 Correct 3 ms 376 KB Output is correct
17 Correct 3 ms 504 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 3 ms 380 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 3 ms 376 KB Output is correct
24 Correct 3 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 81 ms 1760 KB Output is correct
27 Correct 63 ms 2652 KB Output is correct
28 Correct 119 ms 2784 KB Output is correct
29 Correct 657 ms 2724 KB Output is correct
30 Correct 661 ms 2808 KB Output is correct
31 Correct 62 ms 2552 KB Output is correct
32 Correct 376 ms 1244 KB Output is correct
33 Correct 183 ms 1912 KB Output is correct
34 Correct 119 ms 2732 KB Output is correct
35 Correct 173 ms 1400 KB Output is correct
36 Correct 95 ms 2300 KB Output is correct
37 Correct 146 ms 2372 KB Output is correct
38 Correct 111 ms 2680 KB Output is correct
39 Correct 41 ms 1788 KB Output is correct
40 Correct 76 ms 1372 KB Output is correct
41 Incorrect 42 ms 3536 KB Output isn't correct
42 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 4 ms 256 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 3 ms 256 KB Output is correct
9 Correct 31 ms 2808 KB Output is correct
10 Correct 9 ms 888 KB Output is correct
11 Correct 22 ms 1912 KB Output is correct
12 Correct 22 ms 1912 KB Output is correct
13 Correct 28 ms 2552 KB Output is correct
14 Correct 18 ms 1676 KB Output is correct
15 Correct 5 ms 632 KB Output is correct
16 Correct 18 ms 1788 KB Output is correct
17 Correct 45 ms 3836 KB Output is correct
18 Correct 26 ms 2296 KB Output is correct
19 Correct 3 ms 376 KB Output is correct
20 Correct 3 ms 380 KB Output is correct
21 Correct 4 ms 376 KB Output is correct
22 Correct 3 ms 376 KB Output is correct
23 Correct 3 ms 376 KB Output is correct
24 Correct 3 ms 376 KB Output is correct
25 Correct 3 ms 504 KB Output is correct
26 Correct 3 ms 376 KB Output is correct
27 Correct 3 ms 380 KB Output is correct
28 Correct 2 ms 376 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 3 ms 376 KB Output is correct
32 Correct 3 ms 376 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 81 ms 1760 KB Output is correct
35 Correct 63 ms 2652 KB Output is correct
36 Correct 119 ms 2784 KB Output is correct
37 Correct 657 ms 2724 KB Output is correct
38 Correct 661 ms 2808 KB Output is correct
39 Correct 62 ms 2552 KB Output is correct
40 Correct 376 ms 1244 KB Output is correct
41 Correct 183 ms 1912 KB Output is correct
42 Correct 119 ms 2732 KB Output is correct
43 Correct 173 ms 1400 KB Output is correct
44 Correct 95 ms 2300 KB Output is correct
45 Correct 146 ms 2372 KB Output is correct
46 Correct 111 ms 2680 KB Output is correct
47 Correct 41 ms 1788 KB Output is correct
48 Correct 76 ms 1372 KB Output is correct
49 Incorrect 42 ms 3536 KB Output isn't correct
50 Halted 0 ms 0 KB -