squares tp

#include <stdio.h>
#include <stdbool.h>
#define NMAX 101
int sides[NMAX], n, p;
bool used[NMAX][NMAX];

bool isValid(int line, int col, int side) {
  if (side + line >= n || side + col >= n) {
    return false;
  }
  for (int i = line; i < line + side; i++) {
    for (int j = col; j < col + side; j++) {
      if (used[i][j]) {
    return false;
      }
    }
  }
  return true;
}

void setSquare(int line, int col, int side, bool val) {
  for (int i = line; i < line + side; i++) {
    for (int j = col; j < col + side; j++) {
      used[i][j] = val;
    }
  }
}

bool isSol() {
  bool ok = true;
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < n; j++) {
      ok &= used[i][j];
    }
  }
  return ok;
}

void bktr(int top) {
  for (int i = 0; i < n; i++) {
    for (int line = 0; line < n; line++) {
      for (int col = 0; col < n; col++) {
    if (isValid(line, col, sides[i])) {
      setSquare(line, col, sides[i], true);
      if (isSol()) {

      } else {

      }
    }
      }
    }
  }
}

int main(void) {
  int n;
  scanf("%d", &n);
  for (int i = 0; i < n; i++) {
    scanf("%d", sides + i);
  }
  scanf("%d", &p);
  return 0;
}