Toy Cars

Author: seikhchilli

545A.cpp

@@ -0,0 +1,49 @@
+#include<bits/stdc++.h>
+using namespace std;
+
+int main(){
+  ios_base::sync_with_stdio(false);
+  cin.tie(NULL);
+
+  int n;
+  cin>>n;
+
+  int arr[n][n];
+
+  map<int, bool> mp;
+
+  for(int i = 0; i< n; i++){
+    for(int j = 0; j< n; j++){
+      cin>>arr[i][j];
+    }
+  }
+
+  for(int i = 0; i < n; i++){
+    for(int j = i+1; j < n; j++){
+      if(arr[i][j] == 1){
+        mp[i] = true;
+        continue;
+      }
+      if(arr[i][j] == 2){
+        mp[j] = true;
+        continue;
+      }
+      if(arr[i][j] == 3){
+        mp[i] = mp[j] = true;
+      }
+
+    }
+  }
+
+  int arrb[n], k = 0;
+  for(int i = 0; i < n; i++){
+    if(!mp[i]){
+      arrb[k] = i + 1;
+      k++;
+    }
+  }
+  cout<<k<<'\n';
+  for(int i = 0; i < k; i++){
+    cout<<arrb[i]<<" ";
+  }
+}