Compilare: user.cpp: In function ‘void precalcul()’: user.cpp:37:8: warning: statement has no effect [-Wunused-value] for(i;i<=n;i++){ ^ user.cpp:30:9: warning: unused variable ‘t’ [-Wunused-variable] int i,t; ^ user.cpp: In function ‘void sol(int)’: user.cpp:51:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In function ‘int main()’: user.cpp:88:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d%d",&n,&k,&m,&p); ^ user.cpp:90:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld%lld",&v[i].c,&v[i].t); ^ user.cpp:93:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld",&d[i]); ^ user.cpp:99:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&z); ^