View Compilation Error

0_0_14515910_30497.cpp: In function 'void build(int, int)':
0_0_14515910_30497.cpp:49:9: error: expected ';' before 'for'
         for(int j = i+1; j <= n; ++j) {
         ^
0_0_14515910_30497.cpp:49:26: error: 'j' was not declared in this scope
         for(int j = i+1; j <= n; ++j) {
                          ^