Compilare: main.cpp: In function 'int main()': main.cpp:12:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("plaja2.in" , "r" , stdin); ^ main.cpp:13:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("plaja2.out" , "w" , stdout); ^ main.cpp:14:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d" , &N , &K , &T); ^ main.cpp:16:37: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %lld" , &d[i] , &t[i]); ^ main.cpp:21:30: warning: 'tmp' may be used uninitialized in this function [-Wmaybe-uninitialized] long long res = 0, l, r, m, tmp; ^~~