0_0_19537970_14634.c:26:1: error: unknown type name 'bool'
bool check(int key)
^
0_0_19537970_14634.c: In function 'check':
0_0_19537970_14634.c:29:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for(int i=head[h];~i;i=nexts[i])
^
0_0_19537970_14634.c:29:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_19537970_14634.c:31:20: error: 'true' undeclared (first use in this function)
return true;
^
0_0_19537970_14634.c:31:20: note: each undeclared identifier is reported only once for each function it appears in
0_0_19537970_14634.c:32:12: error: 'false' undeclared (first use in this function)
return false;
^
0_0_19537970_14634.c: In function 'main':
0_0_19537970_14634.c:40:5: error: expected expression before '/' token
//freopen("in.txt","r",stdin);
^
0_0_19537970_14634.c:45:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for(int i=0;i<n;i++)
^
0_0_19537970_14634.c:50:17: error: redefinition of 'i'
for(int i=n-1;i>=0;i--){
^
0_0_19537970_14634.c:45:17: note: previous definition of 'i' was here
for(int i=0;i<n;i++)
^
0_0_19537970_14634.c:50:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for(int i=n-1;i>=0;i--){
^
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