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  1. //teja349
  2. #include <bits/stdc++.h>
  3. #include <vector>
  4. #include <set>
  5. #include <map>
  6. #include <string>
  7. #include <cstdio>
  8. #include <cstdlib>
  9. #include <climits>
  10. #include <utility>
  11. #include <algorithm>
  12. #include <cmath>
  13. #include <queue>
  14. #include <stack>
  15. #include <iomanip> 
  16. //setbase - cout << setbase (16); cout << 100 << endl; Prints 64
  17. //setfill -   cout << setfill ('x') << setw (5); cout << 77 << endl; prints xxx77
  18. //setprecision - cout << setprecision (14) << f << endl; Prints x.xxxx
  19. //cout.precision(x)  cout<<fixed<<val;  // prints x digits after decimal in val
  20.  
  21. using namespace std;
  22. #define f(i,a,b) for(i=a;i<b;i++)
  23. #define rep(i,n) f(i,0,n)
  24. #define fd(i,a,b) for(i=a;i>=b;i--)
  25. #define pb push_back
  26. #define mp make_pair
  27. #define vi vector< int >
  28. #define vl vector< ll >
  29. #define ss second
  30. #define ff first
  31. #define ll long long
  32. #define pii pair< int,int >
  33. #define pll pair< ll,ll >
  34. #define sz(a) a.size()
  35. #define inf (1000*1000*1000+5)
  36. #define all(a) a.begin(),a.end()
  37. #define tri pair<int,pii>
  38. #define vii vector<pii>
  39. #define vll vector<pll>
  40. #define viii vector<tri>
  41. #define mod (1000*1000*1000+7)
  42. #define pqueue priority_queue< int >
  43. #define pdqueue priority_queue< int,vi ,greater< int > >
  44.  
  45. const int MaxN = (int)1e5 + 10;
  46. const int MOD = (int)1e9 + 7;
  47. const int INF = 1e9;
  48.  
  49. long long readInt(long long l,long long r,char endd){
  50. 	long long x=0;
  51. 	int cnt=0;
  52. 	int fi=-1;
  53. 	bool is_neg=false;
  54. 	while(true){
  55. 		char g=getchar();
  56. 		if(g=='-'){
  57. 			assert(fi==-1);
  58. 			is_neg=true;
  59. 			continue;
  60. 		}
  61. 		if('0'<=g && g<='9'){
  62. 			x*=10;
  63. 			x+=g-'0';
  64. 			if(cnt==0){
  65. 				fi=g-'0';
  66. 			}
  67. 			cnt++;
  68. 			assert(fi!=0 || cnt==1);
  69. 			assert(fi!=0 || is_neg==false);
  70.  
  71. 			assert(!(cnt>19 || ( cnt==19 && fi>1) ));
  72. 		} else if(g==endd){
  73. 			if(is_neg){
  74. 				x= -x;
  75. 			}
  76. 			assert(l<=x && x<=r);
  77. 			return x;
  78. 		} else {
  79. 			assert(false);
  80. 		}
  81. 	}
  82. }
  83. string readString(int l,int r,char endd){
  84. 	string ret="";
  85. 	int cnt=0;
  86. 	while(true){
  87. 		char g=getchar();
  88. 		assert(g!=-1);
  89. 		if(g==endd){
  90. 			break;
  91. 		}
  92. 		cnt++;
  93. 		ret+=g;
  94. 	}
  95. 	assert(l<=cnt && cnt<=r);
  96. 	return ret;
  97. }
  98. long long readIntSp(long long l,long long r){
  99. 	return readInt(l,r,' ');
  100. }
  101. long long readIntLn(long long l,long long r){
  102. 	return readInt(l,r,'\n');
  103. }
  104. string readStringLn(int l,int r){
  105. 	return readString(l,r,'\n');
  106. }
  107. string readStringSp(int l,int r){
  108. 	return readString(l,r,' ');
  109. }
  110.  
  111. // int main() {
  112. // //	freopen("input.txt", "r", stdin);
  113. // //	ios::sync_with_stdio(false); cin.tie(NULL);
  114. // 	int t = readIntLn(1, 100);
  115. // 	while (t --> 0) {
  116. // 		int n = readIntLn(1, 1e5);
  117. // 	}
  118. // 	assert (getchar() == EOF);
  119. // 	return 0;
  120. // }     
  121.  
  122. //std::ios::sync_with_stdio(false);   
  123.  
  124. int row[1234],col[1234];
  125. int main(){
  126.     std::ios::sync_with_stdio(false);
  127.     int t=readIntLn(1,10000);
  128.     int sum2=0;
  129.     while(t--){
  130.     	int n=readIntLn(2,500);
  131.     	sum2+=n*n;
  132.     	int i,j;
  133.     	int val;
  134.     	rep(i,n){
  135.     		row[i]=0;
  136.     		col[i]=0;
  137.     	}
  138.     	rep(i,n){
  139.     		rep(j,n){
  140.     			if(j!=n-1){
  141.     				val=readIntSp(0,1e3);
  142.     			}
  143.     			else{
  144.     				val=readIntLn(0,1e3);
  145.     			}
  146.     			if(val==0){
  147.     				row[i]=1;
  148.     				col[j]=1;
  149.     			}
  150.     		}
  151.     	}
  152.     	rep(i,n){
  153.     		if(!row[i] || !col[i]){
  154.     			cout<<"NO"<<endl;
  155.     			break;
  156.     		}
  157.     	}
  158.     	if(i==n){
  159.     		cout<<"YES"<<endl;
  160.     	}
  161.     }
  162.     assert(sum2<=2e6);
  163.     assert (getchar() == EOF);
  164.     return 0;     
  165. }
Runtime error #stdin #stdout #stderr 0s 15248KB
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Standard input is empty
stdout
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Standard output is empty
stderr
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prog: prog.cpp:79: long long int readInt(long long int, long long int, char): Assertion `false' failed.
https://ideone.com/FB8qh2
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
secret

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