Compilare: user.cpp: In function ‘i32 main()’: user.cpp:40:55: warning: operation on ‘i’ may be undefined [-Wsequence-point] v[--i] = (u64(v[-~i]) * A + B) % 914107849; ^ user.cpp:47:56: warning: operation on ‘i’ may be undefined [-Wsequence-point] v[--i] = (u64(v[-~i]) * A + B) % 2095480566; ^ user.cpp:54:56: warning: operation on ‘i’ may be undefined [-Wsequence-point] v[--i] = (u64(v[-~i]) * A + B) % 1869500027; ^ user.cpp:71:71: warning: operation on ‘i’ may be undefined [-Wsequence-point] for(u32 i = 0; i != 256; _index[++i] = _index[~-i] + frequence[~-i]); ^ user.cpp:71:71: warning: operation on ‘i’ may be undefined [-Wsequence-point] user.cpp:80:71: warning: operation on ‘i’ may be undefined [-Wsequence-point] for(u32 i = 0; i != 256; _index[++i] = _index[~-i] + frequence[~-i]); ^ user.cpp:80:71: warning: operation on ‘i’ may be undefined [-Wsequence-point] user.cpp:89:71: warning: operation on ‘i’ may be undefined [-Wsequence-point] for(u32 i = 0; i != 256; _index[++i] = _index[~-i] + frequence[~-i]); ^ user.cpp:89:71: warning: operation on ‘i’ may be undefined [-Wsequence-point] user.cpp:98:71: warning: operation on ‘i’ may be undefined [-Wsequence-point] for(u32 i = 0; i != 256; _index[++i] = _index[~-i] + frequence[~-i]); ^ user.cpp:98:71: warning: operation on ‘i’ may be undefined [-Wsequence-point] user.cpp: At global scope: user.cpp:15:37: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) void write(u32 x) ^ user.cpp: In function ‘i32 main()’: user.cpp:30:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radixsort.in", "r", stdin); ^ user.cpp:32:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &N, &A, &B, &C); ^ user.cpp:98:5: warning: iteration 255u invokes undefined behavior [-Waggressive-loop-optimizations] for(u32 i = 0; i != 256; _index[++i] = _index[~-i] + frequence[~-i]); ^ user.cpp:98:22: note: containing loop for(u32 i = 0; i != 256; _index[++i] = _index[~-i] + frequence[~-i]); ^ user.cpp:89:5: warning: iteration 255u invokes undefined behavior [-Waggressive-loop-optimizations] for(u32 i = 0; i != 256; _index[++i] = _index[~-i] + frequence[~-i]); ^ user.cpp:89:22: note: containing loop for(u32 i = 0; i != 256; _index[++i] = _index[~-i] + frequence[~-i]); ^ user.cpp:80:5: warning: iteration 255u invokes undefined behavior [-Waggressive-loop-optimizations]