0_0_13499831_11741.cpp: In function 'int check(int, int)':
0_0_13499831_11741.cpp:8:4: error: 's' was not declared in this scope
if(s[i]!=s[i+1])return false;
^
0_0_13499831_11741.cpp: In function 'int main()':
0_0_13499831_11741.cpp:17:1: error: 'flag' was not declared in this scope
flag = 0;
^
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