foo.cc: In function 'int main()':
foo.cc:36:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 1; i <= t; i++)
                 ~~^~~~
/tmp/cc0sY19N.o: In function `main':
foo.cc:(.text.startup+0x7): relocation truncated to fit: R_X86_64_PC32 against symbol `t' defined in .bss section in /tmp/cc0sY19N.o
foo.cc:(.text.startup+0x20): relocation truncated to fit: R_X86_64_PC32 against symbol `t' defined in .bss section in /tmp/cc0sY19N.o
foo.cc:(.text.startup+0x57): relocation truncated to fit: R_X86_64_PC32 against symbol `t' defined in .bss section in /tmp/cc0sY19N.o
foo.cc:(.text.startup+0x6c): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/cc0sY19N.o
foo.cc:(.text.startup+0x7f): relocation truncated to fit: R_X86_64_PC32 against symbol `n' defined in .bss section in /tmp/cc0sY19N.o
foo.cc:(.text.startup+0x95): relocation truncated to fit: R_X86_64_PC32 against symbol `y' defined in .bss section in /tmp/cc0sY19N.o
/tmp/cc0sY19N.o: In function `_GLOBAL__sub_I_t':
foo.cc:(.text.startup+0x103): relocation truncated to fit: R_X86_64_PC32 against `.bss'
foo.cc:(.text.startup+0x121): relocation truncated to fit: R_X86_64_PC32 against `.bss'
collect2: error: ld returned 1 exit status

自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。