Compilare: user.cpp: In function ‘void solve()’: user.cpp:90:9: warning: unused variable ‘l’ [-Wunused-variable] int l, x, i, j; ^ user.cpp:90:12: warning: variable ‘x’ set but not used [-Wunused-but-set-variable] int l, x, i, j; ^ user.cpp: In function ‘void read()’: user.cpp:33:37: 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:34:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:38:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i][j].h); ^ user.cpp:43:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i][j].r); ^ user.cpp:46:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &e[i][j]); ^ user.cpp: In function ‘void write()’: user.cpp:112:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] printf("%d %d %d", sol, minr, mine); ^ user.cpp: In function ‘void scmax(int)’: user.cpp:84:22: warning: ‘pos’ may be used uninitialized in this function [-Wmaybe-uninitialized] pos = w[pos]; ^