Compilare: main.cpp: In function 'int main()': main.cpp:43:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < lst.size(); ++j) ~~^~~~~~~~~~~~ main.cpp:30:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tenerife.in", "r", stdin); ^ main.cpp:31:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tenerife.out", "w", stdout); ^ main.cpp:32:44: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int n, m, k; scanf("%d %d %d", &n, &m, &k); ^ main.cpp:41:45: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int x, y, d; scanf("%d %d %d", &x, &y, &d); ^