Even Grid

input/code.cpp: In function 'int main()':
input/code.cpp:36:19: warning: ignoring return value of '__ssize_t getline(char**, size_t*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |     (void) getline(&line, &size, stdin);
      |            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
input/code.cpp:43:23: warning: ignoring return value of '__ssize_t getline(char**, size_t*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |         (void) getline(&line, &size, stdin);
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~~~

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>

#define LOOP(i,s,e) for (uint64_t i = (s); i < (e); i++)
#define SCAN(...) if (scanf(__VA_ARGS__) == 0) return EXIT_FAILURE

void pr(bool b){
    if (b)
        printf("1");
    else
        printf("0");
}

uint64_t find_first(bool *r, uint64_t s){
    uint64_t i = s;
    while (! r[i])
        i++;
    return i;
}

int main() {
    uint64_t n = 0;
    SCAN("%ld\n", &n);

    // main algo

    bool row[n];
    bool collumn[n];
    collumn[0] = true;
    char *line = NULL;
    size_t size;
    (void) getline(&line, &size, stdin);
    // printf("line : --%s--\n", line);
    LOOP(i, 0, n){
        row[i] = (line[i] == '1') ? true : false;
    }

    LOOP(i, 1, n){
        (void) getline(&line, &size, stdin);
        // printf("line : --%s--\n", line);
        collumn[i] = (line[0] == '1') ? true : false;
    }

    LOOP(i, 0, n){
        pr(row[i]);
    }
    printf("\n");
    uint64_t next = 0;
    LOOP(i, 1, n){
        pr(collumn[i]);
        if (! collumn[i]){ // 0
            LOOP(j, 1, n){
                pr(false);
            }
        } else { // 1
            next = find_first(row, next+1);
            LOOP(j, 1, n){
                pr(j==next);
            }
        }
        printf("\n");
    }

    return EXIT_SUCCESS;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: ACCEPTED

Test 10

Verdict: WRONG ANSWER

Test 11

Verdict: ACCEPTED