Compilare: main.cpp: In function 'bool isNr(char)': main.cpp:20:15: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if(c>='0' && c<='9' || c == '\0') ~~~~~~~^~~~~~~~~ main.cpp: In function 'void rez()': main.cpp:87:9: warning: unused variable 'x' [-Wunused-variable] int x; ^ main.cpp:64:29: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(s1, 100005, stdin); ^ main.cpp:65:29: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(s2, 100005, stdin); ^ main.cpp:66:29: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(s3, 100005, stdin); ^ main.cpp: In function 'int main()': main.cpp:297:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("puzzle3.in", "r", stdin); ^ main.cpp:298:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("puzzle3.out", "w", stdout); ^ main.cpp:299:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &t); ^