Compilare: main.cpp: In function 'int vec(int, int)': main.cpp:80:44: warning: variable 'ok' set but not used [-Wunused-but-set-variable] int arie = arii[-a[iv][jv]]+1, ok = 0; ^~ main.cpp:73:9: warning: unused variable 'o' [-Wunused-variable] int o = 0, ll = 0; ^ main.cpp:73:16: warning: unused variable 'll' [-Wunused-variable] int o = 0, ll = 0; ^~ main.cpp:97:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:121:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.in", "r", stdin); ^ main.cpp:122:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.out", "w", stdout); ^ main.cpp:123:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &cer); ^ main.cpp:124:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &n, &m); ^ main.cpp:129:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c", &c[i][j]); ^ main.cpp:132:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^