foo.cc:23:39: warning: bad option '-fwhole-program' to pragma 'optimize' [-Wpragmas]
   23 | #pragma GCC optimize("-fwhole-program")
      |                                       ^
foo.cc:30:41: warning: bad option '-fstrict-overflow' to pragma 'optimize' [-Wpragmas]
   30 | #pragma GCC optimize("-fstrict-overflow")
      |                                         ^
foo.cc:32:41: warning: bad option '-fcse-skip-blocks' to pragma 'optimize' [-Wpragmas]
   32 | #pragma GCC optimize("-fcse-skip-blocks")
      |                                         ^
foo.cc:46:51: warning: bad option '-funsafe-loop-optimizations' to pragma 'optimize' [-Wpragmas]
   46 | #pragma GCC optimize("-funsafe-loop-optimizations")
      |                                                   ^
foo.cc:62:17: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   62 | void read(int &x) {
      |                 ^
foo.cc:62:17: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
foo.cc:62:17: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
foo.cc:62:17: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
foo.cc:69:26: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   69 | void clear(vector<int> &x) { vector<int> tmp; swap(tmp, x);}
      |                          ^
foo.cc:69:26: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
foo.cc:69:26: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
foo.cc:69:26: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
foo.cc:70:11: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   70 | void Init() {
      |           ^
foo.cc:70:11: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
foo.cc:70:11: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
foo.cc:70:11: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
foo.cc:76:30: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   76 | void Dfs(int o, int V, int tp) {
      |                              ^
foo.cc:76:30: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
foo.cc:76:30: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
foo.cc:76:30: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
foo.cc:87:21: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
   87 | void Dp(int x, int y) {
      |                     ^
foo.cc:87:21: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
foo.cc:87:21: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
foo.cc:87:21: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]
foo.cc:100:10: warning: bad option '-fwhole-program' to attribute 'optimize' [-Wattributes]
  100 | int main() {
      |          ^
foo.cc:100:10: warning: bad option '-fstrict-overflow' to attribute 'optimize' [-Wattributes]
foo.cc:100:10: warning: bad option '-fcse-skip-blocks' to attribute 'optimize' [-Wattributes]
foo.cc:100:10: warning: bad option '-funsafe-loop-optimizations' to attribute 'optimize' [-Wattributes]

[Hydro](https://hydro.ac)提供评测服务