Compilare: user.cpp: In function ‘void solve()’: user.cpp:101:9: warning: unused variable ‘l’ [-Wunused-variable] int l, x, i, j; ^ user.cpp:101:12: warning: variable ‘x’ set but not used [-Wunused-but-set-variable] int l, x, i, j; ^ user.cpp: In function ‘void read()’: user.cpp:37:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rayman.in", "r", stdin); ^ user.cpp:38:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:42:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &v[i][j].h); ^ user.cpp:47:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &v[i][j].r); ^ user.cpp:50:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &e[i][j]); ^ user.cpp: In function ‘void write()’: user.cpp:122:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] printf("%lld %lld %lld", sol, minr, mine); ^ user.cpp: In function ‘void scmax(int)’: user.cpp:95:21: warning: ‘pos’ may be used uninitialized in this function [-Wmaybe-uninitialized] pos = w[pos]; ^