View Compilation Error

0_0_17236814_792.cpp: In function 'int main()':
0_0_17236814_792.cpp:23:9: error: 'minr' was not declared in this scope
         minr = 10000, maxr = 0;
         ^
0_0_17236814_792.cpp:23:23: error: 'maxr' was not declared in this scope
         minr = 10000, maxr = 0;
                       ^
0_0_17236814_792.cpp:24:9: error: 'minc' was not declared in this scope
         minc = 10000, maxc = 0;
         ^
0_0_17236814_792.cpp:24:23: error: 'maxc' was not declared in this scope
         minc = 10000, maxc = 0;
                       ^