Compilare: main.cpp: In function 'int main()': main.cpp:42:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("perioada.in", "r", stdin); ^ main.cpp:43:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("perioada.out", "w", stdout); ^ main.cpp:44:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int n; scanf("%d %s", &n, str + 1); ^ main.cpp:70:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int m; scanf("%d", &m); ^ main.cpp:72:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int le, ri; scanf("%d %d", &le, &ri); ^