Compilare: main.cpp: In function 'int main()': main.cpp:30:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=1;i<=n;++i) ^~~ main.cpp:32:8: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' sort(v+1,v+n+1,cmp); ^~~~ main.cpp:56:7: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(j=i+1;j<=n;j++) ^~~ main.cpp:66:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' printf("%lld\n",1LL*n*(n-1)*(n-2)*(n-3)/24-sum); ^~~~~~ main.cpp:28:9: warning: unused variable 'm' [-Wunused-variable] int m ,n,i,j; ^ main.cpp:26:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("patrulatere.in","r",stdin); ^ main.cpp:27:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("patrulatere.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:31:37: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&v[i].x,&v[i].y); ^