Compilare: user.cpp: In function ‘int main()’: user.cpp:32:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for (int i=1;i<=n;i++) scanf("%d",&t[i]); st.insert(2e9); ^~~ user.cpp:32:47: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ for (int i=1;i<=n;i++) scanf("%d",&t[i]); st.insert(2e9); ^~ user.cpp:29:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("slidingwindow.in","r",stdin); ^ user.cpp:30:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("slidingwindow.out","w",stdout); ^ user.cpp:31:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); sol=2e9; ^ user.cpp:32:45: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (int i=1;i<=n;i++) scanf("%d",&t[i]); st.insert(2e9); ^