Compilare: main.cpp: In member function 'void ciclu::prec()': main.cpp:76:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < nodes.size() ; ++i) u(i + 1, durata[nodes[i]] + k); ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:167:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tubeyou.in", "r", stdin); ^ main.cpp:168:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tubeyou.out", "w", stdout); ^ main.cpp:170:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &k, &q); ^ main.cpp:173:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &TT[i]); ^ main.cpp:260:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &durata[i]); ^ main.cpp:271:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ main.cpp:275:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ main.cpp:285:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^ main.cpp:215:31: warning: 'last' may be used uninitialized in this function [-Wmaybe-uninitialized] Arb[nra].root = last; ~~~~~~~~~~~~~~^~~~~~