0_0_37802299_30197.cpp: In function 'void solve()':
0_0_37802299_30197.cpp:82:28: error: 'begin_time' was not declared in this scope
int windowid=window_push(begin_time,end_time);
^
0_0_37802299_30197.cpp:82:39: error: 'end_time' was not declared in this scope
int windowid=window_push(begin_time,end_time);
^
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