/in/foo.c: In function 'main':
/in/foo.c:17:20: warning: implicit declaration of function 'min' [-Wimplicit-function-declaration]
    f[i][j]=s[i][j]+min(f[i+1][j],f[i][j-1]);
                    ^~~
/tmp/cccqiU1I.o: In function `main':
foo.c:(.text.startup+0x192): undefined reference to `min'
foo.c:(.text.startup+0x210): undefined reference to `min'
foo.c:(.text.startup+0x27c): undefined reference to `min'
collect2: error: ld returned 1 exit status