Compilare: main.cpp: In function 'int main()': main.cpp:48:27: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::stack<int>::size_type {aka long unsigned int}' [-Wformat=] printf("%d",sti.size()); ^ main.cpp:28:20: warning: unused variable 'vf' [-Wunused-variable] int n,m,i,j,nr,vf=1; ^~ main.cpp:26:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("liste.in","r",stdin); ^ main.cpp:27:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("liste.out","w",stdout); ^ main.cpp:29:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:32:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&m); ^ main.cpp:35:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&nr); ^