0_0_7347364_5269.c: In function `main':
0_0_7347364_5269.c:5: error: `stack' undeclared (first use in this function)
0_0_7347364_5269.c:5: error: (Each undeclared identifier is reported only once
0_0_7347364_5269.c:5: error: for each function it appears in.)
0_0_7347364_5269.c:5: error: syntax error before "char"
0_0_7347364_5269.c:25: error: `s' undeclared (first use in this function)
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