Submission #286166

#	Time	Username	Problem	Language	Result	Execution time	Memory
286166		SomeoneUnknown	Red-blue table (IZhO19_stones)	C++14	38 / 100	6 ms	2048 KiB

stones

#include <bits/stdc++.h>
using namespace std;

int main(){
    int T;
    scanf("%d", &T);
    for(int t = 0; t < T; ++t){
        int r, c;
        scanf("%d %d", &r, &c);
        /*if(r == 2 && c == 1){
            printf("2\n+\n+\n");
            continue;
        }//*/
        char ans[r][c+1];
        for(int i = 0; i < r; ++i){
            ans[i][c] = '\0';
        }
        for(int i = 0; i < (r-1)/2; ++i){
            for(int j = 0; j < (c-1)/2; ++j){
                ans[i][j] = '+'; //horizontal
            }
        }
        for(int i = r/2+1; i < r; ++i){
            for(int j = 0; j < (c-1)/2; ++j){
                ans[i][j] = '-'; //vertical
            }
        }
        for(int i = r/2+1; i < r; ++i){
            for(int j = c/2+1; j < c; ++j){
                ans[i][j] = '+'; //horizontal
            }
        }
        for(int i = 0; i < (r-1)/2; ++i){
            for(int j = c/2+1; j < c; ++j){
                ans[i][j] = '-'; //vertical
            }
        }
        for(int i = (r-1)/2; i <= r/2; ++i){
            for(int j = 0; j < c; j++){
                ans[i][j] = '-';
            }
        }
        for(int j = 0; j < r; j++){
            for(int i = (c-1)/2; i <= c/2; ++i){
                ans[j][i] = '+';
            }
        }
        int ansnum = r+c-4+(r%2)+(c%2);
        int ans2 = ansnum;
        if(2 - (r%2) > (c-1)/2){
            for(int i = 0; i <= c/2; ++i){
                for(int j = (r-1)/2; j <= r/2; ++j){
                    ans[j][i] = '+';
                }
            }
            //printf("B");
            ans2 = ansnum+2-(r%2)-(c-1)/2;
        }
        if(2 - (c%2) > (r-1)/2 && ansnum+2-(c%2)-(r-1)/2>ans2){
            for(int i = 0; i <= r/2; ++i){
                for(int j = (c-1)/2; j <= c/2; ++j){
                    ans[i][j] = '-';
                }
            }
            for(int i = 0; i <= c/2; ++i){
                for(int j = (r-1)/2; j <= r/2; ++j){
                    ans[j][i] = '-';
                }
            }
            //printf("A");
            ans2 = ansnum+2-(c%2)-(r-1)/2;
        }
        printf("%d\n", ans2);
        for(int i = 0; i < r; ++i){
            printf("%s\n", ans[i]);
        }
    }
}

Compilation message (stderr)

stones.cpp: In function 'int main()':
stones.cpp:6:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    6 |     scanf("%d", &T);
      |     ~~~~~^~~~~~~~~~
stones.cpp:9:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |         scanf("%d %d", &r, &c);
      |         ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 17 / 17
• Subtask 2: 10 / 10
• Subtask 3: 0 / 16
• Subtask 4: 11 / 11
• Subtask 5: 0 / 15
• Subtask 6: 0 / 31