/in/foo.cc: In function 'void addflow()':
/in/foo.cc:51:9: warning: unused variable 'cost' [-Wunused-variable]
  double cost=0;
         ^~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:68:8: warning: unused variable 'x' [-Wunused-variable]
  int i,x,y,j;
        ^
/in/foo.cc:68:10: warning: unused variable 'y' [-Wunused-variable]
  int i,x,y,j;
          ^
/tmp/cchekBsp.o: In function `addflow()':
foo.cc:(.text+0x83): relocation truncated to fit: R_X86_64_PC32 against symbol `T' defined in .bss section in /tmp/cchekBsp.o
foo.cc:(.text+0x8a): relocation truncated to fit: R_X86_64_PC32 against symbol `S' defined in .bss section in /tmp/cchekBsp.o
foo.cc:(.text+0x9a): relocation truncated to fit: R_X86_64_PC32 against symbol `path' defined in .bss section in /tmp/cchekBsp.o
foo.cc:(.text+0xba): relocation truncated to fit: R_X86_64_PC32 against symbol `c' defined in .bss section in /tmp/cchekBsp.o
foo.cc:(.text+0x19c): relocation truncated to fit: R_X86_64_PC32 against symbol `c' defined in .bss section in /tmp/cchekBsp.o
/tmp/cchekBsp.o: In function `findpath(int)':
foo.cc:(.text+0x1c0): relocation truncated to fit: R_X86_64_PC32 against symbol `T' defined in .bss section in /tmp/cchekBsp.o
foo.cc:(.text+0x1e5): relocation truncated to fit: R_X86_64_PC32 against symbol `path' defined in .bss section in /tmp/cchekBsp.o
foo.cc:(.text+0x27c): relocation truncated to fit: R_X86_64_PC32 against symbol `c' defined in .bss section in /tmp/cchekBsp.o
foo.cc:(.text+0x2fd): relocation truncated to fit: R_X86_64_PC32 against symbol `T' defined in .bss section in /tmp/cchekBsp.o
foo.cc:(.text+0x339): relocation truncated to fit: R_X86_64_PC32 against symbol `T' defined in .bss section in /tmp/cchekBsp.o
foo.cc:(.text+0x3af): additional relocation overflows omitted from the output
collect2: error: ld returned 1 exit status