0_0_38075467_27632.c:18:4: error: variably modified 'fac' at file scope
ll fac[MAXN+5],in[MAXN+5];
^
0_0_38075467_27632.c:18:16: error: variably modified 'in' at file scope
ll fac[MAXN+5],in[MAXN+5];
^
0_0_38075467_27632.c: In function 'init':
0_0_38075467_27632.c:21:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for(ll i=1;i<=MAXN;++i){
^
0_0_38075467_27632.c:21:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_38075467_27632.c:25:12: error: redefinition of 'i'
for(ll i=MAXN-1;i>=0;--i){
^
0_0_38075467_27632.c:21:12: note: previous definition of 'i' was here
for(ll i=1;i<=MAXN;++i){
^
0_0_38075467_27632.c:25:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for(ll i=MAXN-1;i>=0;--i){
^
0_0_38075467_27632.c: In function 'main':
0_0_38075467_27632.c:40:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for(int i=1;i*n<=k;++i){
^
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