Compilare: main.cpp: In function 'int findd(int, int)': main.cpp:53:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(z<0) ^~ main.cpp:55:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' auto it=v[z%M].lower_bound({z,-1}); ^~~~ main.cpp: In function 'int solve(int, int, int, int)': main.cpp:84:6: warning: unused variable 'cnt' [-Wunused-variable] int cnt=0; ^~~ main.cpp: In function 'unsigned int getint()': main.cpp:18:40: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buf,maxb,1,fin),ptr=0; ^ main.cpp:23:40: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buf,maxb,1,fin),ptr=0; ^