Compilare: main.cpp: In function 'int main()': main.cpp:131:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("razbunare.in", "r", stdin); ^ main.cpp:132:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("razbunare.out", "w", stdout); ^ main.cpp:134:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &l, &q); ^ main.cpp:136:87: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] for(int i = 1; i <= l ; ++i) scanf("%d%d%d%d", &a[i].u, &a[i].v, &a[i].c, &a[i].r); ^ main.cpp:142:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &u, &v, &a, &b); ^