/in/foo.c: In function 'main':
/in/foo.c:19:14: warning: implicit declaration of function 'min' [-Wimplicit-function-declaration]
    f[i][j] = min(f[i-1][(j+i-1)%i], f[i-1][j%i]) + a[i][j];
              ^~~
/tmp/ccAGzWXT.o: In function `main':
foo.c:(.text.startup+0x115): undefined reference to `min'
foo.c:(.text.startup+0x18b): undefined reference to `min'
foo.c:(.text.startup+0x1ed): undefined reference to `min'
collect2: error: ld returned 1 exit status