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View Compilation Error

0_0_32856581_13803.cpp:1:1: error: expected unqualified-id before '<' token
 <span style="font-size:14px;">int n, m;
 ^
0_0_32856581_13803.cpp: In function 'int main()':
0_0_32856581_13803.cpp:8:15: error: 'n' was not declared in this scope
     while(~sf(n)) {
               ^
0_0_32856581_13803.cpp:8:16: error: 'sf' was not declared in this scope
     while(~sf(n)) {
                ^
0_0_32856581_13803.cpp:9:74: error: 'printf' was not declared in this scope
  printf("%I64d %I64d\n", (4 * n * n + 6 * n - 1), (2 * n * n + 2 * n + 1));
                                                                          ^
0_0_32856581_13803.cpp: At global scope:
0_0_32856581_13803.cpp:12:2: error: expected unqualified-id before '<' token
 }</span>//https://blog.csdn.net/Triose_Stream/article/details/51865875
  ^


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