Compilare: main.cpp: In function 'long long int eval_x(int, int)': main.cpp:73:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ok<fixed_x[x].size()&&fixed_x[x][ok].second!=-1) ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:90:9: warning: unused variable 'was_n' [-Wunused-variable] int was_n=m,was_m=n; ^~~~~ main.cpp:90:17: warning: unused variable 'was_m' [-Wunused-variable] int was_n=m,was_m=n; ^~~~~ main.cpp:85:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tower.in","r",stdin); ^ main.cpp:86:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tower.out","w",stdout); ^ main.cpp:88:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%i%i",&n,&m); ^ main.cpp:93:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%i%i",&total,&add); ^ main.cpp:96:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%i%i",&inp[i].x,&inp[i].y); ^ main.cpp:102:59: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%i%i%i",&inp[i].x,&inp[i].y,&inp[i].points); ^