View Compilation Error

0_0_36108521_30922.c:5:4: error: variably modified 'f' at file scope
 ll f[N][3][2];
    ^
0_0_36108521_30922.c:6:5: error: variably modified 'num' at file scope
 int num[N];
     ^
0_0_36108521_30922.c:7:17: error: unknown type name 'bool'
 ll dfs(int cur, bool lim, int pre, int cnt) {
                 ^
0_0_36108521_30922.c: In function 'fuck':
0_0_36108521_30922.c:37:24: error: 'true' undeclared (first use in this function)
     return dfs(sz - 1, true, 2, 0);
                        ^
0_0_36108521_30922.c:37:24: note: each undeclared identifier is reported only once for each function it appears in
0_0_36108521_30922.c: In function 'main':
0_0_36108521_30922.c:43:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for (int cas = 1; T--; ++cas) {
     ^
0_0_36108521_30922.c:43:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code