Compilare: main.cpp: In function 'int main()': main.cpp:70:21: warning: unused variable 'w' [-Wunused-variable] if(p==2){ long long w=(long long) nrc; ^ main.cpp:43:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("aquapark.in","r",stdin); ^ main.cpp:44:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("aquapark.out","w",stdout); ^ main.cpp:45:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&p,&n,&m); ^ main.cpp:46:56: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=m;i++){scanf("%d%d",&mc[i][0],&mc[i][1]); ^