Compilare: main.cpp: In function 'long long int solve1(int)': main.cpp:46:30: warning: operation on 'top' may be undefined [-Wsequence-point] r[stk[top]] = stk[top--] - 1; ~~~^~ main.cpp: In function 'int main()': main.cpp:80:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("identice.in", "r", stdin); ^ main.cpp:81:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("identice.out", "w", stdout); ^ main.cpp:84:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d ", &t, &n, &d); ^ main.cpp:86:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s + 1); ^