0_0_31214190_3322.c:4:1: error: unknown type name 'bool'
bool used[MAXN];
^
0_0_31214190_3322.c:4:6: error: variably modified 'used' at file scope
bool used[MAXN];
^
0_0_31214190_3322.c:5:1: error: unknown type name 'bool'
bool check(int a, int b)
^
0_0_31214190_3322.c: In function 'check':
0_0_31214190_3322.c:10:13: error: 'true' undeclared (first use in this function)
used[p] = true;
^
0_0_31214190_3322.c:10:13: note: each undeclared identifier is reported only once for each function it appears in
0_0_31214190_3322.c:13:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for (int i = 0; i < b; ++i)
^
0_0_31214190_3322.c:13:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_31214190_3322.c:17:11: error: 'false' undeclared (first use in this function)
return false;
^
0_0_31214190_3322.c: In function 'main':
0_0_31214190_3322.c:31:16: error: 'false' undeclared (first use in this function)
memset(used, false, b * sizeof(bool));
^
0_0_31214190_3322.c:31:34: error: 'bool' undeclared (first use in this function)
memset(used, false, b * sizeof(bool));
^
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