Compilare: main.cpp: In function 'void cauta_vecini_insula(int, int*, int*, int)': main.cpp:95:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < vecI[ind_insula].size(); i++) { ~~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void cauta_vecini_lac(int, int*, int*)': main.cpp:108:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < vecL[ind_lac].size(); i++) { ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:136:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pirati.in", "r", stdin); ^ main.cpp:137:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pirati.out", "w", stdout); ^ main.cpp:140:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d\n", &n, &m, &q); ^ main.cpp:144:33: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(sir, m + 2, stdin); ^ main.cpp:162:49: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &x1, &y1, &x2, &y2); ^