Compilare: main.cpp: In function 'int main()': main.cpp:8:15: warning: unused variable 'ct' [-Wunused-variable] int n,i,k,ct,l,nk,j,rez; ^~ main.cpp:9:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("interzis.in","r",stdin); ^ main.cpp:10:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("interzis.out","w",stdout); ^ main.cpp:11:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n%s",&n,&l,s+1); ^