Compilare: main.cpp: In function 'int main()': main.cpp:43:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (int i=0; i<=n+1; i++) ^~~ main.cpp:45:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' while ( !q.empty() ) { ^~~~~ main.cpp:30:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("taxa.in","r",stdin); ^ main.cpp:31:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("taxa.out","w",stdout); ^ main.cpp:32:48: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d%d",&n , &m, &l0,&c0,&lf,&cf); ^ main.cpp:35:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]); ^