0_0_19778406_18739.cpp: In function 'int main()':
0_0_19778406_18739.cpp:79:75: error: 'myabs' was not declared in this scope
ans = min(ans, myabs(tail[idx].second + head[i].second));
^
0_0_19778406_18739.cpp:81:75: error: 'myabs' was not declared in this scope
ans = min(ans, myabs(tail[idx].second + head[i].second));
^
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